LazyTools Header
Smog Calculator — Air Quality & PM2.5 | LazyTools
Math & Science

Smog Calculator

Calculate the Air Quality Index (AQI) from PM2.5 concentration (μg/m³) and translate into health impact categories. Furthermore, AQI 0–50: Good; 51–100: Moderate; 101–150: Unhealthy for Sensitive Groups; 151–200: Unhealthy; 201–300: Very Unhealthy; 301+: Hazardous.

✓ Free forever ✓ No login required ✓ Works offline ✓ Instant results ✓ Step-by-step shown

Calculate the Air Quality Index (AQI) from PM2.5 concentration (μg/m³) and translate into health impact categories. Furthermore, AQI 0–50: Good; 51–100: Moderate; 101–150: Unhealthy for Sensitive Groups; 151–200: Unhealthy; 201–300: Very Unhealthy; 301+: Hazardous.

How to use the Smog Calculator

1
Enter values

Type inputs.

2
Click Calculate

Results appear.

3
Read table

Key values highlighted.

4
Check insight

Context shown.

5
Apply

Use in analysis.

Variants, options and when to use each

InputRangeNotes
PrimaryVariesRequired

The formula explained

AQI from PM2.5: linear interpolation within breakpoint ranges (EPA AQI formula)
See formula section.

Standard formula. Furthermore, valid under stated conditions.

Worked example — Smog Calculator

StepResult
Enter values aboveSee widget
ResultShown in green
Results in output table. Furthermore, the insight provides interpretation.

What is Smog Calculator?

The Smog Calculator uses standard formulas. Furthermore, inputs are validated. Moreover, results include context.

Used by students and professionals. Furthermore, saves time.

Key values highlighted. Additionally, insight notes context.

Who uses this calculator?

Students and professionals use this calculator.

Historical context and related concepts

Formula is well established.

Why Smog Calculator matters

Accurate calculation supports science and engineering.

Smog Calculator in practice

Widely used in research and industry.

Frequently asked questions

Use SI units consistently. Furthermore, unit labels are shown in each field. Moreover, convert inputs before entry if needed.
As accurate as your inputs. Furthermore, the formula is exact. Moreover, real measurements introduce additional uncertainty.
Yes — standard textbook equations are used. Furthermore, source references are given in the Formula section. Moreover, results match published tables within rounding.
The numerical result with units. Furthermore, the insight explains physical meaning and typical ranges. Moreover, compare to reference values for sanity-checking.
Note inputs, formula, and result. Furthermore, cite the relevant primary standard or textbook. Moreover, report to appropriate significant figures.

Related tools

Significant Figures Calculator

Round results to appropriate precision.

→

Scientific Notation Converter

Express large or small values in scientific notation.

→

Molar Mass Calculator

Molar mass for stoichiometric calculations.

→

Molarity Calculator

Concentration calculations in mol/L.

→

Ideal Gas Law Calculator

PV=nRT for gas law problems.

→

Stoichiometry Calculator

Full stoichiometry from balanced equations.

→

Rate this tool

4.5
out of 5
★★★★★
314 ratings
5 ★
70%
4 ★
19%
3 ★
5%
2 ★
3%
1 ★
3%
How useful was this tool?
★ ★ ★ ★ ★