UK qualifications & percentage conversion

A-Level Grades to Percentage

Convert UK A-Level grades (A*, A, B, C, D, E, U) to percentage equivalents using the Uniform Mark Scale (UMS) midpoint methodology — the standard approach when raw marks are not published. Pair this page with our A-Level to GPA Converter when you also need a US grade equivalent, and with A-Level to UCAS Points for UK tariff totals. For course-weighted percentage averages (not UMS), use our percentage grade calculator.

A-Level to percentage

UMS midpoint estimates — single subject or multiple subjects (2–5)

Mode

Subjects (2–5)

Subject 1#1

Subject 2#2

Result

UMS midpoint basis

Select grades for all subjects (2–5) to see your average percentage and classification.

Conversion table

The table maps each grade to its typical UMS band, the midpoint percentage used for conversions, how the result is usually reported on forms, and a US letter equivalent for context. For scale context across countries, see our GPA scale overview.

A-Level grade to UMS range, midpoint percentage, reported percentage, classification, and US letter equivalent
A-Level Grade	UMS Range	Midpoint %	Percentage Equivalent (Reported)	Classification	US Letter Equivalent
A*	90–100	95%	90%+	Distinction	A+
A	80–89	84.5%	80–89%	Excellent	A
B	70–79	74.5%	70–79%	Very Good	B+
C	60–69	64.5%	60–69%	Good	B
D	50–59	54.5%	50–59%	Satisfactory	C+
E	40–49	44.5%	40–49%	Pass	C
U	0–39	—	Below 40%	Unclassified	F

Note: UMS boundaries are set by AQA, Edexcel, OCR, and WJEC each year after results. The percentages above represent midpoint estimates and are widely used for academic conversion purposes.

Classification bands

Use this key to interpret midpoint-based percentages when filling percentage fields on international forms.

Percentage band	Classification	Typical grade
90%+	Distinction	(A*)
80–89%	Excellent	(A)
70–79%	Very Good	(B)
60–69%	Good	(C)
50–59%	Satisfactory	(D)
40–49%	Pass	(E)
Below 40%	Unclassified	(U)

How A-Level percentages work

What UMS is. The Uniform Mark Scale (UMS) is how UK exam boards normalize marks when papers differ in difficulty between years. Your scripts are marked, converted to UMS, and then placed into grade boundaries. An A* typically requires 90+ UMS at A2 in reformed specifications; an A aligns with 80+ UMS on that scale, stepping down to E at 40 UMS — reflecting the minimum pass threshold on the UMS scale used for grading.

Why conversion matters. US, Canadian, and Australian admissions portals, scholarship forms, and some graduate programmes often ask for a percentage alongside or instead of letter grades. Employers may use the same fields. Because certificates show grades rather than a single percentage, midpoint conversion is the most transparent way to complete those forms consistently. When you also need UK tariff figures, our UCAS Points calculator aggregates multiple qualifications.

Midpoint methodology. When raw UMS sub-scores are unavailable, taking the midpoint of each grade's UMS band (e.g. 84.5% for an A in the 80–89 band) is the most defensible single number for each grade. Averaging those midpoints across subjects yields a composite percentage for multi-subject profiles — the same approach illustrated in the worked examples below.

Disclaimer: This page provides academic estimates for planning and application forms. Official conversions and certificated marks come from your exam board via your school or centre. Always supply certified transcripts where institutions require verified results.

Worked examples

Example 1 — Single subject

A* in Mathematics

A student earned an A* in Mathematics. A* maps to 90–100% on the UMS scale. Reported midpoint percentage: 95%. Use case: US university application requiring a percentage transcript line per subject.

Example 2 — Three A-Levels

Biology (A), Chemistry (B), Mathematics (A*)

Biology (A) = 84.5%, Chemistry (B) = 74.5%, Mathematics (A*) = 95%.

Average = (84.5 + 74.5 + 95) ÷ 3 = 84.67%. Classification: Excellent.

Context: Competitive for UK medicine/bioscience shortlists and strong for US pre-med academic screening alongside other application components.

Example 3 — UCAS context (ABB)

Biology (A), History (B), English Literature (B)

A student with ABB achieved Biology (84.5%), History (74.5%), English Literature (74.5%). Average: 77.8%. This falls in the 70–79% (Very Good) band, often described in honours terms as broadly in line with an upper second-class standard when mapping to degree-class language — always subject-specific.

Use cases

US university applications

Common App and Coalition App percentage fields where you report secondary qualifications as percentages per subject or as an average.

Canadian admissions

Ontario and British Columbia programmes that publish minimum percentage averages for international high school credentials.

Scholarship applications

Funding awards that ask for percentage-based academic standing alongside or instead of GPA.

Graduate school

Postgraduate programmes (US, Australia, EU) that request undergraduate entry qualification as a percentage.

Job applications

Graduate employers that require A-Level percentage grades on standardised recruitment forms.

Frequently Asked Questions

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Conversion table

Classification bands

How A-Level percentages work

Worked examples

Example 1 — Single subject

Example 2 — Three A-Levels

Example 3 — UCAS context (ABB)

Use cases

Frequently Asked Questions

What percentage is an A* at A-Level?

What percentage is an A at A-Level?

What percentage is a B at A-Level?

How do I convert my A-Level grades to a percentage for a US university?

Is the A-Level percentage conversion official?

What percentage is a pass at A-Level?