Tools Category
Free Math & Science Tools — Calculators and Converters
Free science and maths calculators for chemistry, biology, physics, ecology and environmental science.
Science and maths underpin every field of study and industry. From chemistry labs to ecological surveys, accurate calculations matter. Furthermore, having instant access to the right formula saves hours of manual work.
All tools run locally in your browser. Your inputs never reach any server. Moreover, no account is needed and nothing is stored.
The collection covers eight areas — chemistry, biology, physics, environmental science, agriculture, mathematics, lab research and animal science. Additionally, use the search box or dropdown to find any tool quickly.
Chemistry
Molecular, reaction and solution chemistry tools for students and researchers.
Solutions & Concentrations
Molarity Calculator
Use the Molarity tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Molality Calculator
Use the Molality tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Normality Calculator
Use the Normality tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Concentration Calculator
Use the Concentration tool for fast, accurate results in your browser. Additionally, no account or download is needed.
PPM to Molarity Calculator
Use the PPM to Molarity tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Mole Fraction Calculator
The Mole Fraction Calculator adds, subtracts, multiplies and divides fractions with full step-by-step working.
Percent Solution Calculator
The Percent Solution Calculator handles all percentage calculations: percentage of a number, percentage change and rever
Mass Percent Calculator
The Mass Percent Calculator handles all percentage calculations: percentage of a number, percentage change and reverse percentage.
Percent Composition Calculator
The Percent Composition Calculator handles all percentage calculations: percentage of a number, percentage change and re
Solution Dilution Calculator
Use the Solution Dilution tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Dilution Factor Calculator
Use the Dilution Factor tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Serial Dilution Calculator
Use the Serial Dilution tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Cell Dilution Calculator
Use the Cell Dilution tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Stoichiometry & Reactions
Molar Mass Calculator
The Molar Mass Calculator parses any chemical formula and returns molar mass, elemental breakdown and mole-to-gram conversions.
Molecular Weight Calculator
The Molecular Weight Calculator parses any chemical formula and returns molar mass, elemental breakdown and mole-to-gram
Mole Calculator
Use the Mole tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Grams to Moles Calculator
Use the Grams to Moles tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Moles to Atoms Converter
Use the Moles to Atoms tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Atom Economy Calculator
Use the Atom Economy tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Theoretical Yield Calculator
Use the Theoretical Yield tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Actual Yield Calculator
Use the Actual Yield tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Percent Yield Calculator
The Percent Yield Calculator handles all percentage calculations: percentage of a number, percentage change and reverse
Empirical Formula Calculator
Use the Empirical Formula tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Chemical Equation Balancer
Use the Chemical Equation Balancer tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Combustion Analysis Calculator
Use the Combustion Analysis tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Combustion Reaction Calculator
Use the Combustion Reaction tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Neutralisation Calculator
Use the Neutralisation tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Net Ionic Equation Calculator
Use the Net Ionic Equation tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Thermodynamics & Equilibrium
Gibbs Free Energy Calculator
Use the Gibbs Free Energy tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Entropy Calculator
Use the Entropy tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Equilibrium Constant Calculator
Use the Equilibrium Constant tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Reaction Quotient Calculator
Use the Reaction Quotient tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Kp Calculator
Use the Kp tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Rate Constant Calculator
Use the Rate Constant tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Rate of Effusion Calculator
Use the Rate of Effusion tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Activation Energy Calculator
The Activation Energy Calculator adds or removes tax instantly.
Arrhenius Equation Calculator
Use the Arrhenius Equation tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Heat of Combustion Calculator
Use the Heat of Combustion tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Boiling Point Calculator
Use the Boiling Point tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Boiling Point Elevation Calculator
The Boiling Point Elevation Calculator adds or removes tax instantly.
Freezing Point Depression Calculator
Use the Freezing Point Depression tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Boiling Point Altitude Calculator
Use the Boiling Point Altitude tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Vapor Pressure Calculator
Use the Vapor Pressure tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Vapor Pressure of Water Calculator
Use the Vapor Pressure of Water tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Electrochemistry & Atomic
Electron Configuration Calculator
Use the Electron Configuration tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Electronegativity Calculator
Use the Electronegativity tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Ionic Strength Calculator
Use the Ionic Strength tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Lattice Energy Calculator
Use the Lattice Energy tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Nernst Equation Calculator
Use the Nernst Equation tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Cell EMF Calculator
Use the Cell EMF tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Electrolysis Calculator
Use the Electrolysis tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Percent Ionic Character Calculator
The Percent Ionic Character Calculator handles all percentage calculations: percentage of a number, percentage change an
Bond Order Calculator
Use the Bond Order tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Double Bond Equivalent Calculator
Use the Double Bond Equivalent tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Degree of Unsaturation Calculator
Use the Degree of Unsaturation tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Average Atomic Mass Calculator
Use the Average Atomic Mass tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Atomic Mass Calculator
Use the Atomic Mass tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Atom Calculator
Use the Atom tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Avogadro Number Calculator
Use the Avogadro Number tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Acids, Bases & Solutions
pH Calculator
The pH Calculator calculates pH, pOH, hydrogen ion concentration and buffer pH using Henderson-Hasselbalch.
pKa Calculator
Use the pKa tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Henderson-Hasselbalch Calculator
Use the Henderson-Hasselbalch tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Buffer pH Calculator
The Buffer pH Calculator calculates pH, pOH, hydrogen ion concentration and buffer pH using Henderson-Hasselbalch.
Buffer Capacity Calculator
Use the Buffer Capacity tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Hydrogen Ion Concentration Calculator
Use the Hydrogen Ion Concentration tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Isoelectric Point Calculator
Use the Isoelectric Point tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Osmotic Pressure Calculator
Use the Osmotic Pressure tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Partial Pressure Calculator
Use the Partial Pressure tool for fast, accurate results in your browser. Additionally, no account or download is needed.
STP Calculator
Use the STP tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Molar Mass of Gas Calculator
The Molar Mass of Gas Calculator parses any chemical formula and returns molar mass, elemental breakdown and mole-to-gra
Mixing Ratio Calculator
Use the Mixing Ratio tool for fast, accurate results in your browser. Additionally, no account or download is needed.
No matching tools found.
Biology & Life Sciences
Genetics, microbiology and ecology tools for biology students and researchers.
Genetics & Molecular Biology
Punnett Square Calculator
Use the Punnett Square tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Dihybrid Cross Calculator
Use the Dihybrid Cross tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Trihybrid Cross Calculator
Use the Trihybrid Cross tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Allele Frequency Calculator
Use the Allele Frequency tool for fast, accurate results in your browser. Additionally, no account or download is needed.
DNA Concentration Calculator
Use the DNA Concentration tool for fast, accurate results in your browser. Additionally, no account or download is needed.
DNA Copy Number Calculator
Use the DNA Copy Number tool for fast, accurate results in your browser. Additionally, no account or download is needed.
DNA to mRNA Converter
Use the DNA to mRNA tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Ligation Calculator
Use the Ligation tool for fast, accurate results in your browser. Additionally, no account or download is needed.
qPCR Efficiency Calculator
Use the qPCR Efficiency tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Annealing Temperature Calculator
Use the Annealing Temperature tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Microbiology & Biochemistry
Bacteria Generation Time Calculator
Use the Bacteria Generation Time tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Cell Doubling Time Calculator
Use the Cell Doubling Time tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Log Reduction Calculator
Use the Log Reduction tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Enzyme Activity Calculator
Use the Enzyme Activity tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Michaelis-Menten Calculator
Use the Michaelis-Menten tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Protein Concentration Calculator
Use the Protein Concentration tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Protein Solubility Calculator
Use the Protein Solubility tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Reconstitution Calculator
Use the Reconstitution tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Resuspension Calculator
Use the Resuspension tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Activity Coefficient Calculator
Use the Activity Coefficient tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Calibration Curve Calculator
Use the Calibration Curve tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Ecology & Population
Carrying Capacity Calculator
Use the Carrying Capacity tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Lotka-Volterra Calculator
Use the Lotka-Volterra tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Shannon Diversity Index Calculator
The Shannon Diversity Index Calculator generates SHA-256, SHA-512, SHA-1 and SHA-384 hashes for any text input in your b
Q10 Calculator
Use the Q10 tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Animal Mortality Rate Calculator
Use the Animal Mortality Rate tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Feed Conversion Ratio Calculator
Use the Feed Conversion Ratio tool for fast, accurate results in your browser. Additionally, no account or download is needed.
No matching tools found.
Physics & Engineering
Physics formulas and engineering calculators for mechanics, electricity and fluids.
Mechanics & Motion
Acceleration / Force / Newton Calculator (F=ma)
Use the Acceleration / Force / Newton (F=ma) tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Physics Formula Solver
The Physics Formula Solver calculates pH, pOH, hydrogen ion concentration and buffer pH using Henderson-Hasselbalch.
Vector Calculator (add, dot product, cross product, magnitude)
Use the Vector (add, dot product, cross product, magnitude) tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Triangle Calculator
The Triangle Calculator solves any triangle from the sides and angles you know.
Circle & Sphere Calculator
The Circle & Sphere Calculator calculates pH, pOH, hydrogen ion concentration and buffer pH using Henderson-Hasselbalch.
Electricity & Optics
Hydroelectric Power Calculator
Use the Hydroelectric Power tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Wind Turbine Calculator
Use the Wind Turbine tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Wind Turbine Profit Calculator
Use the Wind Turbine Profit tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Solar Panel Calculator
Use the Solar Panel tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Solar Panel Wattage Calculator
The Solar Panel Wattage Calculator shows your exact age in years, months, days and hours from any date of birth.
Two-Photon Absorption Calculator
The Two-Photon Absorption Calculator calculates pH, pOH, hydrogen ion concentration and buffer pH using Henderson-Hasselbalch.
Diffusion Coefficient Calculator
The Diffusion Coefficient Calculator highlights every addition, deletion and change between two text blocks.
Fluids & Thermodynamics
Hydraulic Retention Time Calculator
Use the Hydraulic Retention Time tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Detention Time Calculator
Use the Detention Time tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Langmuir Isotherm Calculator
Use the Langmuir Isotherm tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Osmotic Pressure Calculator
Use the Osmotic Pressure tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Vapor Pressure Calculator
Use the Vapor Pressure tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Young-Laplace Equation Calculator
Use the Young-Laplace Equation tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Liquid Ethylene Density Calculator
Use the Liquid Ethylene Density tool for fast, accurate results in your browser. Additionally, no account or download is needed.
No matching tools found.
Environmental Science
Carbon footprint, water and sustainability calculators for environmental awareness.
Carbon & Emissions
Flight Carbon Footprint Calculator
The Flight Carbon Footprint Calculator estimates your annual CO₂ equivalent emissions from transport, diet, home energy
Flight Carbon Footprint Calculator
The Flight Carbon Footprint Calculator estimates your annual CO₂ equivalent emissions from transport, diet, home energy
CO2 Breathing Emission Calculator
The CO2 Breathing Emission Calculator estimates your annual CO₂ equivalent emissions from transport, diet, home energy a
CO2 Grow Room Calculator
The CO2 Grow Room Calculator estimates your annual CO₂ equivalent emissions from transport, diet, home energy and purchases.
Cryptocurrency Footprint Calculator
Use the Cryptocurrency Footprint tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Meat Footprint Calculator
Use the Meat Footprint tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Vegan Footprint Calculator
Use the Vegan Footprint tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Christmas Tree Footprint Calculator
Use the Christmas Tree Footprint tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Bag Footprint Calculator
Use the Bag Footprint tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Hand Drying Footprint Calculator
Use the Hand Drying Footprint tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Books vs e-Books Calculator
The Books vs e-Books Calculator compares the total cost of physical books against e-books over any reading period.
Car vs Bike Calculator
Use the Car vs Bike tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Plug-in Hybrid Economy Calculator
Use the Plug-in Hybrid Economy tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Water & Waste
Water Demand Calculator
Use the Water Demand tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Water Hardness Calculator
Use the Water Hardness tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Water Potential Calculator
Use the Water Potential tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Tap Water Calculator
Use the Tap Water tool for fast, accurate results in your browser. Additionally, no account or download is needed.
TDS Calculator
Use the TDS tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Drip Faucet Calculator
Use the Drip Faucet tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Chemical Oxygen Demand Calculator
Use the Chemical Oxygen Demand tool for fast, accurate results in your browser. Additionally, no account or download is needed.
COVID-19 Waste Calculator
The COVID-19 Waste Calculator estimates the volume and weight of COVID-19 PPE waste generated over a given period.
Cigarette Butts Cleanup Calculator
Use the Cigarette Butts Cleanup tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Plastic Footprint Calculator
Use the Plastic Footprint tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Reduce Your Plastic Calculator
Use the Reduce Your Plastic tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Global Plastic Policy Calculator
Use the Global Plastic Policy tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Energy & Sustainability
Passive House Savings Calculator
Use the Passive House Savings tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Kaya Identity Calculator
Use the Kaya Identity tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Smog Calculator
Use the Smog tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Olympic Games Sustainability Calculator
Use the Olympic Games Sustainability tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Air-Fuel Ratio Calculator
Use the Air-Fuel Ratio tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Bleach Dilution Calculator
Use the Bleach Dilution tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Alligation Calculator
Use the Alligation tool for fast, accurate results in your browser. Additionally, no account or download is needed.
No matching tools found.
Agriculture & Plants
Crop yield, plant spacing and farming tools for growers and agricultural workers.
Crop & Soil
Corn Yield Calculator
Use the Corn Yield tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Grass Seed Calculator
Use the Grass Seed tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Vegetable Seed Calculator
Use the Vegetable Seed tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Vegetable Yield Calculator
Use the Vegetable Yield tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Fertilizer Calculator
Use the Fertilizer tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Water Soluble Fertilizer Calculator
Use the Water Soluble Fertilizer tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Soil (Topsoil) Calculator
The Soil (Topsoil) Calculator estimates the volume and weight of topsoil needed for any area and depth.
Potting Soil Calculator
Use the Potting Soil tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Mulch Calculator
Use the Mulch tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Sod Calculator
Use the Sod tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Compost Calculator
Use the Compost tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Daily Light Integral (DLI) Calculator
The Daily Light Integral (DLI) Calculator calculates Daily Light Integral (DLI) in mol/m²/day from PPFD and photoperiod.
Vapor Pressure Calculator
Use the Vapor Pressure tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Crude Protein Calculator
Use the Crude Protein tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Farm & Livestock
Cattle per Acre Calculator
Use the Cattle per Acre tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Plant Population Calculator
Use the Plant Population tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Plant Spacing Calculator
Use the Plant Spacing tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Tree Spacing Calculator
Use the Tree Spacing tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Bulb Spacing Calculator
Use the Bulb Spacing tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Basal Area Calculator
Use the Basal Area tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Grain Bin Calculator
Use the Grain Bin tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Grain Conversion Calculator
Use the Grain Conversion tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Livestock Fence Cost Calculator
Use the Livestock Fence Cost tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Lawn Mowing Cost Calculator
Use the Lawn Mowing Cost tool for fast, accurate results in your browser. Additionally, no account or download is needed.
No matching tools found.
Animal Science
Gestation and reproductive calculators for livestock and companion animals.
Gestation Calculators
Cat Pregnancy Calculator
Use the Cat Pregnancy tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Dog Pregnancy Calculator
Use the Dog Pregnancy tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Cow Gestation Calculator
Use the Cow Gestation tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Horse Gestation Calculator
The Horse Gestation Calculator predicts the foaling date from the breeding or last ovulation date.
Goat Gestation Calculator
Use the Goat Gestation tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Sheep Gestation Calculator
Use the Sheep Gestation tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Swine Gestation Calculator
Use the Swine Gestation tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Rabbit Gestation Calculator
Use the Rabbit Gestation tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Guinea Pig Pregnancy Calculator
Use the Guinea Pig Pregnancy tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Llama Gestation Calculator
Use the Llama Gestation tool for fast, accurate results in your browser. Additionally, no account or download is needed.
No matching tools found.
Mathematics
Algebra, statistics, geometry and number theory tools for maths students.
Algebra & Numbers
Equation Solver (linear, quadratic, simultaneous)
The Equation Solver (linear, quadratic, simultaneous) finds both roots of ax²+bx+c=0 using the quadratic formula.
Fraction Calculator
The Fraction Calculator adds, subtracts, multiplies and divides fractions with full step-by-step working.
GCD & LCM Calculator
Use the GCD & LCM tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Significant Figures Calculator
Use the Significant Figures tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Scientific Notation Converter
Use the Scientific Notation tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Z-Score Calculator
The Z-Score Calculator computes the z-score, percentile and standard deviations from the mean for any value.
P Value Calculator
Use the P Value tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Geometry & Units
Miller Indices Calculator
Use the Miller Indices tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Cubic Cell Calculator
Use the Cubic Cell tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Unit Conversion for Chemistry
Use the Unit Conversion for Chemistry tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Gibbs Phase Rule Calculator
The Gibbs Phase Rule Calculator calculates pH, pOH, hydrogen ion concentration and buffer pH using Henderson-Hasselbalch.
Radioactivity & Decay
Half-life Calculator
The Half-life Calculator calculates remaining quantity after radioactive decay using half-life, initial amount and elapsed time.
Half-Life Calculator (radioactive decay + drug dosing)
The Half-Life Calculator (radioactive decay + drug dosing) calculates remaining quantity after radioactive decay using h
Radioactive Decay Calculator
Use the Radioactive Decay tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Radiocarbon Dating Calculator
Use the Radiocarbon Dating tool for fast, accurate results in your browser. Additionally, no account or download is needed.
No matching tools found.
Trees & Forestry
Tree measurement, valuation and benefit calculators for arborists and land managers.
Tree Measurement & Value
Tree Age Calculator
The Tree Age Calculator shows your exact age in years, months, days and hours from any date of birth.
Tree Diameter Calculator
Use the Tree Diameter tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Tree Height Calculator
Use the Tree Height tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Tree Value Calculator
Use the Tree Value tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Tree Benefits Calculator
Use the Tree Benefits tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Tree Leaves Calculator
Use the Tree Leaves tool for fast, accurate results in your browser. Additionally, no account or download is needed.
Fish Mercury Calculator
Use the Fish Mercury tool for fast, accurate results in your browser. Additionally, no account or download is needed.
No matching tools found.
Math & Science Tools for Everyone
Science tools are most useful when they are fast, accurate and accessible. These calculators cover everything from balancing chemical equations to modelling population dynamics. Furthermore, students can verify coursework results and researchers can speed up routine calculations.
Each tool applies the correct scientific formula. Inputs are validated and results appear immediately. Moreover, the plain-language outputs help you interpret results without needing a reference textbook nearby.
Nothing is stored and no account is required. Your experimental data, concentrations and research inputs stay entirely on your device. Additionally, all tools work on phones and tablets as well as desktops.