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TNToolsNexus

GPA converter & calculator

Convert percentages to letter grades and 4.0-scale GPA, and compute your credit-weighted cumulative GPA — with the full scale shown.

Percent → letter → 4.0 GPA

= B+ = 3.3 GPA

Cumulative GPA from courses

Cumulative GPA: 3.60 over 7 credits

The scale used here

LetterPercent4.0 GPA
A93–1004.0
A-90–923.7
B+87–893.3
B83–863.0
B-80–822.7
C+77–792.3
C73–762.0
C-70–721.7
D+67–691.3
D65–661.0
Fbelow 650.0

The most common US scale — your institution's may differ (some use A+ = 4.3, or different percent bands). Check your handbook when it matters.

Your grades never leave your browser — the conversion runs on your device.

Maintained by ToolsNexus

Three tools in one: percentage → letter → 4.0 GPA conversion, a credit-weighted cumulative GPA calculator for your course list, and the full scale table printed in the open — with the honest note that your institution’s scale may differ.

How to use it

  1. Type a percentage — the letter grade and 4.0 value appear instantly.
  2. For cumulative GPA: add each course’s letter grade and credit hours.
  3. Cross-check everything against the printed scale table below the calculator.

Why credits change everything

Cumulative GPA is not the average of your letter grades — it’s the average weighted by credit hours. A 4-credit organic chemistry B pulls harder than a 1-credit lab A, which is why two students with identical letter-grade lists can hold different GPAs. The course-list calculator here does that weighting explicitly, showing total credits alongside the result so transfer and part-time semesters compute honestly.

Boundaries, and the scale printed in full

The difference between 89.9% and 90% is a third of a grade point on this scale — boundary effects are where most GPA confusion lives, so the complete mapping sits on this page instead of behind the calculation. It’s the most common US scale; A+ = 4.3 schools and different band cutoffs exist, and for applications the registrar’s version is the one that counts. Working toward a boundary? The final grade calculator tells you what the exam needs to deliver, and the weighted grade calculator computes the percentage you’re converting.

Private by design

Transcript data is yours — conversions and the GPA math run entirely in your browser.

Last updated:

Frequently asked questions

Is this scale the same at every school?
No — and that honesty matters. This uses the most common US mapping (93+ = A = 4.0, 90–92 = A− = 3.7, and so on), but institutions differ: some award A+ = 4.3, some cut A at 94, percentage bands vary internationally. For anything official, your school's handbook wins.
How is cumulative GPA calculated?
Credit-weighted: each course's grade points (letter × its 4.0 value) times its credit hours, summed, divided by total credits. An A in a 4-credit course lifts your GPA more than an A in a 1-credit seminar — which is why the credits column exists.
Why do employers and grad schools ask for the 4.0 scale?
It's the common denominator across US institutions with different percentage schemes. Converting your percentages to the 4.0 scale is how transcripts get compared — imperfectly, but consistently.
What's the difference between 89.9% and 90%?
On this scale, a third of a grade point (B+ 3.3 vs A− 3.7) — boundary effects are real, which is why the full table is printed on this page rather than hidden in the code.
Are my grades sent anywhere?
No — conversions run in your browser.

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