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High School GPA Calculator

Add every class from your report card — including PE and semester classes worth half a credit — and switch on weighting if you take Honors or AP.

Short answer

Turn each letter grade into points (A = 4.0, A− = 3.7, B+ = 3.3), multiply by the class’s credits — most full-year classes are 1 credit, while PE and semester classes are often 0.5 — then divide total points by total credits. Four As and one B across five 1-credit classes is (4+4+4+4+3) ÷ 5 = 3.80. Turn on weighted mode to add +0.5 for Honors and +1.0 for AP/IB.

How we calculate this

Your GPA is a credit-weighted average of your grade points — not a plain average of your letter grades. This tool applies that arithmetic exactly:

  1. Letter grades become grade points. Each letter maps to a point value on the scale below — A = 4.0, A− = 3.7, B+ = 3.3, and so on down to F = 0. An unrecognised grade scores 0 rather than breaking the calculation.
  2. Weighted mode adds a bonus for harder classes. Honors adds +0.5; AP, IB, and dual-enrollment classes add +1.0. The bonus is capped one point above the scale maximum, so an A in an AP class is worth 5.0 and never more. In unweighted mode the course level is ignored entirely.
  3. Each course is weighted by its credits. Grade points are multiplied by credits, so a 5-credit class moves your GPA five times as much as a 1-credit class. An A in a 1-credit art class and a C in a 5-credit chemistry class is (4.0 × 1 + 2.0 × 5) ÷ 6 = 2.33 — not the 3.0 a plain average of an A and a C would suggest.
  4. Total points divided by total credits. GPA = Σ(grade points × credits) ÷ Σ(credits). Cumulative GPA rolls your prior transcript in the same way: (prior GPA × prior credits + this term's points) ÷ all credits combined.

Assumptions

  • Defaults to the standard 4.0 scale with plus/minus grades, with A+ capped at 4.0 — the most common US convention, but not universal. Your registrar's published scale is authoritative; edit the scale to match it.
  • Weighted bonuses (+0.5 Honors, +1.0 AP/IB) are conventions, not standards. Schools weight differently, and some don't weight at all.
  • Only graded, credit-bearing courses count. Pass/fail, audited, and withdrawn courses are normally excluded from GPA — leave them out.
  • Courses with zero or negative credits are skipped rather than silently averaged in.
  • Everything is computed in your browser. Nothing is uploaded or stored.

Sources

Last reviewed: July 15, 2026

Standard 4.0 grade scale (unweighted)

Letter gradeGrade points
A+4.0
A4.0
A-3.7
B+3.3
B3.0
B-2.7
C+2.3
C2.0
C-1.7
D+1.3
D1.0
D-0.7
F0.0

The scale most US schools use. Some award 4.3 for an A+, and some don't use minus grades at all — if yours differs, edit the scale in the calculator and every figure updates.

Weighted GPA bonus by course level

Course levelBonus addedAn A is worthA B is worth
Regular+0.04.03.0
Honors+0.54.53.5
AP / IB+1.05.04.0
Dual-enrollment / College+1.05.04.0

The most common US convention. A weighted course tops out one point above the scale maximum, so an A in AP is 5.0 — never higher. Schools vary: some give Honors a full point, some don't weight at all.

How do you calculate high school GPA?+

Convert each letter grade to points on the 4.0 scale, multiply by the class's credits (most full-year classes are 1 credit, PE and semester classes often 0.5), add up the points, and divide by total credits. If you're in Honors or AP classes, switch on weighted mode to add their bonus.

How do I calculate my GPA for all four years?+

Enter every course from every year and let it average them by credits — that's your cumulative high school GPA. If you already know your GPA so far and just want to add this year, the cumulative calculator is faster: enter your prior GPA and credits, then this year's classes.

Do freshman year grades count toward my GPA?+

For your cumulative high school GPA, yes — every graded course counts, weighted by credits. Many colleges do look most closely at grades from 10th and 11th grade and at your trend over time, but your transcript GPA includes all four years.

Does PE or a half-credit class count?+

Yes, if it's graded — but proportionally. A 0.5-credit class moves your GPA half as much as a 1-credit class. Enter 0.5 in the credits box; the calculator handles fractional credits.

How do I raise my GPA?+

The more credits already on your transcript, the harder each new grade moves the average — this is just arithmetic, not pessimism. Use the target-GPA planner to see the exact GPA you'd need this term to reach the number you're aiming for, and whether it's reachable at all.

Want just the weighted maths? Use the weighted GPA calculator, or start from the main GPA calculator.