A-Level Grade Calculator
Written by the percentages.co.uk team. Reviewed for accuracy.
Work out your predicted A-Level grade from your exam component scores. Add each paper with its weighting and marks to see your overall percentage and grade. Leave a component blank to use the reverse calculator and find out what you need on remaining papers to hit a target grade.
Leave score blank for components not yet sat.
How it works
Most A-Levels consist of two or three exam papers or components, each carrying a set weighting. Your overall grade is the weighted average of your percentage scores across all components, mapped to the A-Level grade scale.
The formula
Overall % = sum of (Component weight x Component score %) / Total weight
Why this works: Each component contributes to your final grade in proportion to its weighting. A paper worth 40% of the marks has twice the influence of one worth 20%. The weighted average correctly reflects that.
A-Level grade boundaries
| Grade | Percentage | UCAS points |
|---|---|---|
| A* | 90%+ | 56 |
| A | 80–89% | 48 |
| B | 70–79% | 40 |
| C | 60–69% | 32 |
| D | 50–59% | 24 |
| E | 40–49% | 16 |
| U | Below 40% | 0 |
Note: exact grade boundaries are set by exam boards after each sitting and vary by subject. These percentages are approximate guides only.
Worked examples
Two equal papers: Paper 1 (50%) scores 78/100, Paper 2 (50%) scores 82/100.
- Paper 1 %: 78%, Paper 2 %: 82%
- Weighted avg: (50% x 78) + (50% x 82) = 80%
Answer: 80% (Grade A)
Three components: Paper 1 (40%) scores 75/100, Paper 2 (40%) scores 68/100, Coursework (20%) scores 72/100.
- Weighted avg: (40% x 75) + (40% x 68) + (20% x 72) = 71.8%
Answer: 71.8% (Grade B)
Aiming for A*: Paper 1 (50%) scored 88%. What is needed on Paper 2 (50%)?
- Paper 1 contribution: 50% x 0.88 = 44%
- Remaining needed: 90% - 44% = 46% from Paper 2
- Paper 2 target: 46% / 0.5 = 92%
Answer: 92% needed on Paper 2
Recovering a weak first paper: Paper 1 (50%) scored 55%. What is needed on Paper 2 for a grade B (70%)?
- Paper 1 contribution: 50% x 0.55 = 27.5%
- Remaining needed: 70% - 27.5% = 42.5%
- Paper 2 target: 42.5% / 0.5 = 85%
Answer: 85% needed on Paper 2
Securing a grade C for a university offer: Papers 1 and 2 (40% each) scored 62% and 58%. What is needed on Paper 3 (20%) for 60%?
- Papers 1 and 2 contribution: (40% x 0.62) + (40% x 0.58) = 48%
- Remaining needed: 60% - 48% = 12% from Paper 3
- Paper 3 target: 12% / 0.2 = 60%
Answer: 60% needed on Paper 3
When to use this
A-Level grade calculations are useful throughout the exam cycle:
- During revision: Set paper-by-paper targets before you sit any exams. If your university offer requires an A in Chemistry and the subject has two equal papers, you know you need an average of 80% across both. If you are stronger on one paper topic, you can plan an asymmetric strategy — for example, aiming for 86% on Paper 1 and 74% on Paper 2.
- After mock results: Enter your mock paper scores to see your predicted grade and how much margin you have before your actual exams. A student scoring 72% on a 50% paper knows they need 88% on the remaining 50% paper to achieve an A*, which focuses revision effort precisely.
- Between exam sittings: For subjects where Paper 1 and Paper 2 are sat in different sessions, knowing your Paper 1 result before Paper 2 lets you use the reverse calculator to set an exact target for the second sitting.
- UCAS applications: When predicted grades influence your university choices, understanding the range of outcomes from best-to-worst paper performance helps you decide whether to apply to stretch, realistic, or insurance choices with confidence.
Understanding the result
The grade shown uses the approximate percentage boundaries in the table above. Actual A-Level grade boundaries are set by exam boards (AQA, OCR, Edexcel, WJEC) after each sitting, based on paper difficulty and cohort performance, and overseen by Ofqual. The boundary for an A may not be exactly 80% in your subject and year. For planning and revision purposes, aim for 2-3 percentage points above the approximate boundary for your target grade to allow for this variation.
UCAS points are awarded per grade per A-Level. An A gives 48 UCAS points, a B gives 40, and so on. University offers can be expressed either as specific grades (e.g. AAB) or as a UCAS points total (e.g. 128). If your offer is in UCAS points, check the combination of grades that meets the threshold, since ABB (40+48+40=128) and AAC (48+48+32=128) both give 128 points but are different grade profiles.
Related concepts
➡ For GCSE planning earlier in your studies, the GCSE grade calculator uses the same weighted paper method to predict your 9-1 grade. ➡ Once you start university, the UK honours degree calculator applies the same weighted average approach to predict your degree classification. ➡ To convert any individual paper score to a percentage before entering it, the percentage grade calculator converts marks scored against total available marks to a percentage.
How to do this in Excel
=SUMPRODUCT(B1:B3,C1:C3)/SUM(B1:B3)
Enter the component weightings in column B and the percentage scores in column C. SUMPRODUCT multiplies each weight by its score and sums the results; dividing by SUM of weights gives the overall weighted percentage. Adjust the row range to match the number of components. For a two-paper 50:50 split with scores of 78% and 82%, the formula gives 80%.
How to do this without a calculator
Multiply each component's percentage score by its weighting as a decimal, sum all products, and divide by the total weighting. For two equal papers with scores of 75% and 65%: (0.5 x 75) + (0.5 x 65) = 37.5 + 32.5 = 70%. For the reverse calculation, subtract the contribution of completed components from the target, then divide by the weighting of the remaining paper. After scoring 55% on a 50% paper targeting 70% overall: 70 - (0.5 x 55) = 70 - 27.5 = 42.5, then 42.5 / 0.5 = 85% needed.
Common mistakes
Confusing UCAS points with the percentage required
A Grade A carries 48 UCAS points but requires around 80% in the exam. These are completely separate scales. University offers are usually stated in grades (A, B, C) or UCAS points, not percentage thresholds.
Applying equal weights when components differ
Always check the official component weightings for your subject and exam board. For many A-Levels, papers are split 50:50 or 40:40:20, but some subjects differ. Using the wrong weighting will give an inaccurate predicted grade.
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