How the calculator works
Everything the calculator does is shown below — the inputs, the maths, and what it deliberately does not do.
What it does
1. Credit-weighted level averages. Within each level of study (for example Year 2), every mark is multiplied by its credit value, the results are added together, and the total is divided by the total credits. A 60-credit module therefore influences your year average four times as much as a 15-credit module.
2. Level weightings applied after averages. Each level average is multiplied by the weighting you enter (for example 30% and 70%), then the contributions are added to produce the overall mark. Weightings must total 100%.
3. Generic classification thresholds. First ≥ 70, Upper Second / 2:1 ≥ 60, Lower Second / 2:2 ≥ 50, Third ≥ 40, below 40 is Below Third / Fail. See Generic UK degree classification thresholds.
4. No hidden rounding. No value is rounded at any stage of the calculation. Displayed results are shown to one decimal place; full precision is used internally.
Worked example
Year 2 modules: 62% (30 credits) and 71% (30 credits). Year 3 modules: 70% (60 credits), 74% (30 credits), 68% (30 credits). Weighting: 30:70.
At 69.3% you are near the 70% boundary. Borderline treatment varies by university — see the borderline guide and check your official regulations.
What it does not do
The calculator does not apply university-specific rules: no institution's rounding policy, borderline zone, profile or credit-majority rule, resit caps, condonement, or excluded-module logic is implemented or implied.
It does not store, transmit, or log your marks — everything runs in your browser. See Privacy and Assumptions & limitations.
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