Grade Conversion Calculator — % to Letter to GPA

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4 modes

Percentage (%)

Percentage bands

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How grade conversion works

Three systems describe the same performance. A percentage measures points earned. A letter grade bands that percentage into a category. A GPA turns the letter into points per credit hour. Converting means walking that chain in whichever direction you need.

Percentage → Letter (via bands) → Grade Points (via 4.0 ladder)

The standard US table

Percentage	Letter	Grade points
97–100	A+	4.0
93–96	A	4.0
90–92	A−	3.7
87–89	B+	3.3
83–86	B	3.0
80–82	B−	2.7
77–79	C+	2.3
73–76	C	2.0
70–72	C−	1.7
67–69	D+	1.3
63–66	D	1.0
60–62	D−	0.7
0–59	F	0.0

This is the widely cited College Board detailed table. Many schools use a simpler flat 10-point scale (90 A, 80 B, 70 C, 60 D) — pick the preset that matches your syllabus.

International grading systems

United Kingdom: degree classifications

UK undergraduate degrees use classifications, not GPAs: 70%+ is First Class Honours, 60–69% Upper Second (2:1), 50–59% Lower Second (2:2), 40–49% Third Class. There is no official UK-to-US GPA mapping — published ranges (e.g., a 2:1 around 3.3–3.7) are approximations, and many universities ask applicants not to convert at all.

India: CGPA and SGPA

For older CBSE mark sheets from the CCE era (pre-2018), percentage = CGPA × 9.5. For university SGPA, the widely cited estimate is (SGPA × 10) − 7.5 — so an 8.5 SGPA ≈ 77.5%. But Indian universities define their own formulas (some use ×8.8, some ×10 flat), so always check your institution's official rule.

Canada: provinces differ

Canada has no single national scale. The Ontario OUAC reference is the closest thing to a standard: 90–100% = A+ (4.0), 85–89% = A (3.9), 80–84% = A− (3.7), and so on down to 50–52% = D− (0.7). Note that a Canadian A at 85–89% maps to 3.9, unlike the US 4.0.

ECTS (Europe)

The European ECTS scale grades by cohort percentile (A = top 10%, B = next 25%, and so on), not by absolute marks — so there is no fixed percentage-to-ECTS conversion. An ECTS grade describes rank within a class, not a score.

For the full walkthrough with examples, read our GPA-to-percentage conversion guide.

Grade Conversion FAQs

How do I convert a percentage to a letter grade?

Match the percentage against your school’s bands. On the common US plus/minus scale, 93–96% is an A, 90–92% an A−, 87–89% a B+, and so on. Pick the band preset that matches your syllabus.

How do I convert GPA to percentage?

On a 4.0 scale, a rough estimate is GPA ÷ 4 × 100, so 3.2 ≈ 80%. It is an approximation, not an official conversion — schools do not define one.

What is a 70% in the UK grading system?

70% or higher is a First Class Honours degree — the top UK classification. UK percentages are marked more strictly than US ones, so never swap the two directly.

How do I convert CGPA to percentage in India?

For older CBSE CCE-era mark sheets, percentage = CGPA × 9.5. For university SGPA, the common estimate is (SGPA × 10) − 7.5, but universities define their own formulas — check yours.

Is there an official UK-to-US GPA conversion?

No. Published mappings are approximate ranges — for example, an Upper Second (2:1) is often placed around 3.3–3.7 — and many universities ask applicants not to convert at all.

Why do grade conversions say “estimate”?

Because every school defines its own scale. A calculator can apply the common published tables, but only your transcript or registrar defines your official grades.