Calculating your GPA is straightforward once you know the GPA formula and what each input means. This guide explains the method in plain language, walks through a manual calculation, and gives worked examples you can follow — then you can do it instantly with the GPA Calculator.
What is GPA?
The GPA calculation tells you your GPA from a few simple inputs. The figure you are solving for here is the GPA.
The GPA formula
This calculation combines several inputs through a multi-step method rather than a single one-line formula. Enter the values below and the calculator resolves each step in order. The inputs it needs are:
- Grade points per subject (e.g. 9, 8, 7.5) — a list of numbers (one per line). Example: 9, 8, 7.5, 9.5, 8.
How to calculate it step by step
- Write down the grade points per subject (e.g. 9, 8, 7.5) (for example, 9, 8, 7.5, 9.5, 8).
- Apply the formula above to get your GPA.
- Double-check the result with the GPA Calculator.
Worked examples
Example 1
| Input / Output | Value |
|---|---|
| Grade points per subject (e.g. 9, 8, 7.5) | 9, 8, 7.5, 9.5, 8 |
| GPA | 8.40 |
| Subjects | 5 |
| Percentage (× 9.5) | 79.80% |
With grade points per subject (e.g. 9, 8, 7.5) of 9, 8, 7.5, 9.5, 8, the GPA works out to 8.40.
Tips for an accurate result
- Keep your units consistent — mixing, say, months with years or grams with kilograms is the most common source of error.
- Round only at the very end. Rounding inputs early can shift the final answer noticeably.
- Re-run the numbers whenever an input changes, rather than estimating from an old result.
Prefer not to do the maths by hand? — the GPA Calculator does it instantly, for free, with the formula and a worked example built in.
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