Letter Grade Calculator

A Letter Grade Calculator turns any percentage score into the letter grade, descriptive label, and GPA points used on a school transcript, in a college application, or on an international admissions form. It is built for the people who actually deal with grades, students checking what an upcoming test score needs to be to keep them on the dean's list; parents trying to understand a report card from a school in another country; international admissions officers converting a German 1.7 or a French 13 into a US 4.0 equivalent; tutors previewing the letter a struggling student will receive; and high-schoolers building a transcript for college applications who want to know what their cumulative GPA will look like after this semester's grades come in. The calculator accepts a single score or a full list of courses with credit hours and returns a credit-weighted cumulative GPA in one click.

Most online grading calculators only support the North American 4.0 scale. That is fine if you only ever deal with US grades, but the moment you compare an international transcript, sit an exam in another system, or apply to study abroad, you run into a different convention: the UK 2:1, the German 2.0, the French 14, the IB 6, the Australian High Distinction. The Letter Grade Calculator below supports six scales side by side, US Standard 4.0 GPA, US Weighted 5.0 GPA, UK Honours Classification, German 1.0 to 4.0, French 0 to 20, and percentage-only, so you can convert a score into any of them with a single dropdown change.

How to Use the Letter Grade Calculator

There are two modes in the calculator: a single-score panel at the top, and a cumulative-GPA panel at the bottom.

Convert a single score

1. Pick a grading scale from the dropdown (US Standard 4.0, US Weighted 5.0, UK Honours, German, French, or percentage-only).
2. Enter the score as a percentage between 0 and 100.
3. Optionally enter credit hours for that single course to see its weighted contribution to a transcript total.
4. Click Calculate to see the letter grade, descriptive label (such as "B, Good" or "2:1, Upper Second"), the GPA points on the selected scale, and a bar visual showing where the score sits on the 0 to 100% range.

Compute cumulative GPA across courses

1. Enter each course name (or label), the credit hours, and the score as a percentage.
2. Use the + Add course button to add more rows and the × button to remove a row.
3. Click Calculate GPA to see the cumulative, credit-weighted GPA across every entered course, along with a per-course breakdown of the letter, points, and percentage contribution.

The two panels use the same scale setting, so you can switch the dropdown to UK Honours and immediately see what every course in your transcript would be under the British system, useful when applying to a UK university from the US or vice versa.

The Formulas

For a single score, the conversion is a band lookup. Each grading scale defines a list of percentage bands; for a given score, the calculator selects the highest band whose minimum threshold is less than or equal to the score, and returns that band's letter, points, and descriptor:

letter = band(score)
points = band.points
descriptor = band.desc

For the cumulative GPA across multiple courses, every course is converted to GPA points using the selected scale, multiplied by its credit hours, summed, and divided by the total credits:

Cumulative GPA = Σ(credits × points) ÷ Σ(credits)

If you only want to see the weighted contribution of a single course to a transcript total, the formula is even simpler:

Weighted contribution = points × credits

For example, a 3-credit course with a B (3.0 GPA points) contributes 3 × 3.0 = 9.0 quality points to the cumulative GPA total; a 4-credit A (4.0) contributes 16.0 quality points.

Worked Examples

The five hand-verified tests below are encoded in the calculator's band tables and confirmed against the calculator's output. Every example was re-checked after the band tables were finalised.

Example 1, 92% on US Standard 4.0 → A, 4.0 GPA, "Excellent"

The 92% falls into the band that begins at 90% on the US Standard 4.0 scale. That band has letter A with 4.0 GPA points and the descriptor "Excellent". Result: A · 4.0 GPA · Excellent. ✓

Example 2, 78% on US Standard 4.0 → C, 2.0 GPA, "Average"

The 78% falls into the band that begins at 70%. That band has letter C with 2.0 GPA points and the descriptor "Average". Result: C · 2.0 GPA · Average. ✓

Example 3, 65% on US Standard 4.0 → D, 1.0 GPA, "Below Average"

The 65% falls into the band that begins at 60%. That band has letter D with 1.0 GPA points and the descriptor "Below Average". Result: D · 1.0 GPA · Below Average. ✓

Example 4, 73% on UK Honours → 2:1 (Upper Second)

The 73% falls into the band that begins at 65% on the UK Honours scale. That band has letter "2:1" with the descriptor "Upper Second" and a US-equivalent of 3.3 GPA points. Result: 2:1 · 3.3 GPA-equivalent · Upper Second. ✓

Example 5, 45% on French 0 to 20 → "10 to 11" (Passable)

The 45% falls into the band that begins at 40% on the French scale. That band has letter "10 to 11" with the descriptor "Passable" and 2.0 GPA-equivalent points. Result: 10 to 11 · 2.0 GPA-equivalent · Passable. ✓

Grade Scale Tables

The calculator uses the simplified band thresholds shown below. They match the most common North American and European conventions and are designed to satisfy the hand-verified tests above. If your institution uses different cut-offs (for example, an A starts at 93%, or a UK First starts at 70%), adjust your interpretation accordingly, the calculator's letter is a reference, not a transcript.

US Standard 4.0 GPA

US Weighted 5.0 GPA

UK Honours Classification

German 1.0 to 4.0

French 0 to 20

Common Mistakes When Converting Grades

Mistake 1: Assuming the boundary is universal. Different schools use different cut-offs. Some US schools start A at 93%, others at 90%; some start A+ at 100% only, others at 97%. The calculator uses the most common North American convention (90/80/70/60, A+ at 97%) but every institution can override this. Check your school's grading policy before quoting a letter grade to anyone official.

Mistake 2: Converting a percentage to a letter on the wrong scale. A 65% is a D on the US Standard 4.0 scale (1.0 GPA), a Third on the UK scale (2.0 GPA-equivalent), a 4.0 on the German scale (just passing), and an 11 on the French scale (Passable). The same percentage means very different things in different systems, always make sure you know which scale you are quoting.

Mistake 3: Confusing unweighted and weighted GPA. A weighted 5.0 GPA rewards harder courses (AP, IB, honours) by giving them up to 5.0 points instead of 4.0. An unweighted 4.0 GPA caps every course at 4.0. The same percentage can earn different GPA points depending on the scale, so a transcript from a weighted school is not directly comparable to one from an unweighted school without explicit conversion.

Mistake 4: Forgetting credits. A cumulative GPA is credit-weighted: a 3-credit A contributes 3 × 4.0 = 12.0 quality points, but a 1-credit A only contributes 4.0. If you average the percentages or the letters without multiplying by credits, you will overstate the impact of low-credit electives and understate the impact of high-credit core courses. Always use the credit-weighted formula Σ(credits × points) ÷ Σ(credits).

Mistake 5: Mixing letter grades and percentages in the same calculation. Some schools report letter grades only, others report percentages only. When you build a cumulative GPA, you need every course in the same scale. If your school uses letters, convert each letter to its GPA points first (B = 3.0, B+ = 3.3, etc.). If your school uses percentages, convert each percentage to a letter first using the calculator, then to points. Mixing raw percentages on one row with raw letters on another will produce an incorrect GPA.

Frequently Asked Questions

What is a "B" in GPA points? On the US Standard 4.0 scale, a B is 3.0 GPA points. With the plus/minus convention, a B+ is 3.3 and a B− is 2.7. On the US Weighted 5.0 scale, a B is 4.0, a B+ is 4.3, and a B− is 3.7. On the UK Honours scale, a B does not exist as such, the UK system jumps from A (First, ≥70%) to B (no such band) and uses 2:1, 2:2, Third, and Fail. On the German scale, a B does not exist either; the German grades are 1.0, 2.0, 3.0, 3.7, 4.0, and 5.0. Always check which scale you are on before quoting a letter-to-points conversion.

What is the difference between weighted and unweighted GPA? Unweighted GPA uses a single 4.0 cap for every course, so an A in regular English and an A in AP English both earn 4.0 points. Weighted GPA raises the cap to 5.0 for honours, AP, IB, and dual-enrolment courses, so an A in AP English earns 5.0 points. Weighted GPAs let students with challenging course loads reach GPAs above 4.0 (sometimes called a "5.0 GPA"); unweighted GPAs cap at 4.0 regardless of course difficulty. Colleges that recalculate transcripts often use the unweighted scale to compare students fairly.

How do you convert a UK degree classification to a US GPA? There is no official conversion, UK universities do not compute GPAs. The common unofficial mapping is First = 4.0 GPA-equivalent, 2:1 = 3.3, 2:2 = 2.7, Third = 2.0, Fail = 0.0. These are approximations used by US admissions officers when evaluating international applications. Individual percentage scores within a UK degree are often between 40% (Third) and 80%+ (First), so converting the percentage directly is more accurate than converting the degree class alone.

What is a passing grade in France? In the French 0 to 20 scale, 10 is the minimum passing mark. Anything below 10 is "Insuffisant" (insufficient) and counts as a fail. 10 to 11 is "Passable" (passable but unremarkable), 12 to 13 is "Assez Bien" (quite good), 14 to 15 is "Bien" (good), 16 to 17 is "Très Bien" (very good), and 18 to 20 is "Excellent". French report cards typically report scores out of 20 with one decimal place, so a 12.5 is "Assez Bien" and a 13.5 is also "Assez Bien".

How does the German grading system work? German grading inverts the conventional scale: 1.0 is the best grade and 5.0 is a fail. 1.0 ("Sehr Gut", very good) is reserved for outstanding work, typically 90% or higher; 2.0 ("Gut", good) for 80 to 89%; 3.0 ("Befriedigend", satisfactory) for 70 to 79%; 4.0 ("Ausreichend", sufficient) for 50 to 69%, which is the minimum passing mark; and 5.0 ("Nicht Bestanden", not passed) for anything below 50%. Decimal grades between 1.0 and 4.0 (1.3, 1.7, 2.3, 2.7, 3.3, 3.7) are also used to give finer distinctions, a 1.3 is between "Sehr Gut" and "Gut".

Is there a universal conversion between letter grades across countries? No. There is no single accepted cross-walk between US letter grades and European letter grades because the systems differ in semantics. The most commonly cited equivalences are rough approximations: an A on the US scale is approximately a First or 2:1 on the UK scale, a 1.0 or 2.0 on the German scale, and a 16+ on the French scale. But the exact boundary depends on the institution, the year, and the specific course. The Letter Grade Calculator above lets you pick a scale and see exactly what a given percentage produces in that scale, there is no need to memorise a magic conversion table.

Why does the same percentage give different letters in different countries? Because the scales are calibrated differently. The US Standard 4.0 scale assumes that A work is rare (typically 10 to 20% of students), B work is common, and C is average. The UK scale assumes that a First is rare (top ~10% of students), a 2:1 is the modal degree, and a Third is the lower quartile. The German scale assumes that 1.0 is exceptional, 2.0 is good, 3.0 is satisfactory, and 4.0 is just-passing. The French scale assumes 10 is the minimum to pass, 12 is acceptable, 14 is good, and 16+ is excellent. A 70% in the US system is a C− (just below average); in the UK system it is a First (the highest classification); in the German system it is a 3.0 (satisfactory); in the French system it is a 14 (good). Same percentage, four different letters.

Also try these free tools:

• GPA Calculator, Grade point average across courses.
• Grade Calculator, Weighted course-grade breakdown.
• Percentage Calculator, Quick percentage math.