GPA & Grade Calculator
Calculate your US 4.0 GPA with credit hours, UK degree classification (First, 2:1, 2:2, Third) with module credits and year weightings, or weighted grade average. Includes the reverse "what score do I need?" calculator — free, instant, no login.
GPA & Grade Calculator Tool
Three grading systems in one free calculator
Most GPA calculators are US-only. LazyTools supports the US 4.0 scale, UK degree classification and percentage-based grading — with the reverse "what score do I need?" calculator that competitors rarely offer for free.
How to calculate your GPA or grade average
How this GPA calculator compares
| Feature | LazyTools ✦ | GpaCalculator.net | RogerHub | Athenify |
|---|---|---|---|---|
| US 4.0 GPA with credit hours | ✔ Yes | ✔ Yes | ✔ Yes | ✔ Yes |
| Cumulative GPA across semesters | ✔ Yes | ✔ Yes | ✘ No | ✘ No |
| UK degree classification (First/2:1/2:2) | ✔ Yes | ✘ No | ✘ No | ✔ Yes |
| UK year weightings (Y1/Y2/Y3) | ✔ Configurable | ✘ No | ✘ No | ✔ Yes |
| Weighted percentage average | ✔ Yes | ✔ Yes | ✔ Yes | ✘ No |
| "What score do I need?" reverse calc | ✔ All 3 modes | ✘ No | ✔ Grade only | ✔ UK only |
| Target GPA planner (US) | ✔ Yes | ✔ Yes | ✘ No | ✘ No |
| Three systems in one tool | ✔ Yes | US only | Grade only | UK only |
| No login required | ✔ Yes | ✔ Yes | ✔ Yes | Account for save |
How GPA and Grade Averages Are Calculated — US 4.0 Scale, UK Degree Classification and Weighted Averages Explained
Grade Point Average (GPA) and degree classification systems are the primary ways universities and employers assess academic performance, yet the methods used vary dramatically between countries. A student calculating a 3.8 GPA in the United States, a First Class degree in the United Kingdom, or a 85% weighted average in Australia may all be describing equivalent levels of academic achievement — but the calculations behind each figure are entirely different. Understanding how your specific grading system works is essential for accurate self-assessment and for planning what grades you need in upcoming assessments.
How US GPA is calculated on the 4.0 scale
The US GPA system converts letter grades to numerical grade points, then calculates a weighted average based on the credit hours of each course. The standard grade point values are: A/A+ = 4.0, A− = 3.7, B+ = 3.3, B = 3.0, B− = 2.7, C+ = 2.3, C = 2.0, C− = 1.7, D+ = 1.3, D = 1.0, and F = 0.0. To calculate GPA, multiply each course's grade points by its credit hours, sum those products, and divide by total credit hours. For example: a B+ (3.3) in a 4-credit course and an A (4.0) in a 3-credit course gives (3.3 × 4) + (4.0 × 3) = 13.2 + 12.0 = 25.2 divided by 7 total credits = 3.6 GPA.
Cumulative GPA tracks your overall academic performance across all semesters. To calculate a cumulative GPA, multiply your existing cumulative GPA by your existing credit hours, add this semester's quality points (GPA × credits), and divide by total cumulative credit hours. A GPA below 2.0 typically puts a student on academic probation at US universities. Dean's List recognition usually requires a semester GPA above 3.5 or 3.7, depending on the institution.
How UK degree classification works
UK universities award honours degrees in four classifications based on a student's overall weighted average: First Class Honours (1st) requires 70% or above; Upper Second Class (2:1) requires 60–69%; Lower Second Class (2:2) requires 50–59%; and Third Class requires 40–49%. Below 40% is a fail. The 2:1 classification is particularly significant in the UK job market — the vast majority of competitive graduate schemes and postgraduate programmes specify a 2:1 as a minimum requirement.
Module marks are weighted by their credit values within a year, and different academic years contribute different weights to the final classification. Most three-year UK degrees weight Year 1 at 0% (it typically functions as a qualifying year), Year 2 at approximately 33–40%, and Year 3 at approximately 60–67%. Some universities use a 25/75 split, others 30/70, and some include Year 1 at a small weight. Always check your specific institution's regulations, as these weights are not universal. The borderline rule — where a student averaging just below a classification boundary may be elevated based on other criteria — also varies by university.
Weighted grade averages — the universal method
Weighted grade averages are used when different assessments carry different importance in the final course grade. The formula is: weighted average = Σ(score × weight) ÷ Σ(weights). For example, if a midterm exam (30% weight) scores 75% and a final exam (70% weight) scores 82%, the weighted average is (75 × 30 + 82 × 70) ÷ 100 = (2,250 + 5,740) ÷ 100 = 79.9%. This system ensures that high-stakes assessments like finals and dissertations have proportionally more impact on the final grade than low-stakes homework or participation marks.
The reverse calculator — what score do I need?
The reverse grade calculator solves the formula backwards from a target grade. Given your current weighted average on completed assessments and the weight of remaining work, the required score is calculated as: Required Score = (Target − Current Average × Completed Weight) ÷ Remaining Weight. For example: if your current average on 60% of the course weight is 65%, and you want an overall 70%, the required score on the remaining 40% is (70 − 65 × 0.6) ÷ 0.4 = (70 − 39) ÷ 0.4 = 31 ÷ 0.4 = 77.5%. If the required score exceeds 100%, the target may not be achievable regardless of how well you perform — a useful reality check for planning purposes.
Converting between US GPA and UK degree classification
There is no official universal conversion between the US GPA scale and UK degree classifications, but widely used approximations exist. A First Class Honours (70%+) is generally treated as equivalent to a GPA of 3.7–4.0. An Upper Second (2:1) at 60–69% is roughly equivalent to 3.3–3.6 GPA. A Lower Second (2:2) at 50–59% corresponds to approximately 2.7–3.2 GPA. A Third Class at 40–49% maps to roughly 2.0–2.7 GPA. These conversions are used informally for postgraduate applications and graduate employment but are not recognised as official equivalences by any regulatory body. If an official conversion is required — for example for a US university postgraduate application — a credential evaluation from WES or ECCTIS is typically required.