GPA calculator

How a GPA is worked out

Each letter grade is worth a number of grade points, and each course counts as many times as it has credits. Multiply each course's points by its credits, add those up, and divide by the total credits. The example the calculator opens with:

That is 49 grade points over 14 credits, a GPA of 3.50, which the tool shows with the Credits counted and Grade points beside it. A four-credit course moves the average more than a three-credit one, so a B+ in Calculus costs more than a B in History would gain.

The 4.0 scale, plus and minus grades

Octoolo uses the scale most US colleges and high schools use: A 4.0, B 3.0, C 2.0, D 1.0 and F 0, with a plus adding 0.3 and a minus taking 0.3 away (A− 3.7, B+ 3.3, B− 2.7 and so on). There is no A+ above 4.0 unless you switch on A+ counts as 4.3, which some schools use; D− is 0.7.

Courses graded Pass or Withdrawn are left out of the average and their credits are not counted, which matches how most transcripts treat P/NP and W. Schools differ on details, such as an A+ worth 4.33 or repeated courses that replace an old grade, so check your registrar's rules when a decimal matters, for example for a scholarship cut-off.

Cumulative and weighted GPA

A cumulative GPA combines all your terms, weighted by credits. Type your GPA so far and Credits so far from your transcript and the calculator adds this term's courses: with a 3.20 over 60 credits, the example term above brings it to (3.20 × 60 + 49) ÷ 74 = 3.26. Averaging the two GPAs as 3.35 would be wrong, because the earlier terms carry far more credits.

Many high schools also report a weighted GPA, where harder classes count extra: Octoolo adds 0.5 for Honors and 1.0 for AP or IB courses, so an A in an AP class counts as 5.0. The weighting is added to passing grades only; an F stays at 0. With weighting on, the calculator shows the Unweighted GPA beside the weighted one, since colleges often recalculate it their own way. Four one-credit classes, an AP A, an Honors B+, an A− and a B, give 3.88 weighted and 3.50 unweighted.

For the grade you need in a single class, use the grade calculator.