How this math works
GPA is a credit-weighted mean: points for a course are the letter’s scale value times its credits, and the term GPA is total points divided by total credits.
Points = scale value × credits
GPA = total points ÷ total credits
Unweighted 4.0 counts A+ and A as 4.0 and is the usual college GPA. Weighted adds 0.5 for honors and 1.0 for AP or IB, capped at 5.0 per course. The 4.3 scale counts A+ as 4.3. Credits default to 3 when you pick a letter; rows with no letter, zero credits, or a P, NP, W or I are left out of both totals.
The weighted page explains the honors and AP bumps. Catalog starts from your school’s course list. Your registrar keeps the official record.
Scale table
| Letter | Unweighted | Honors | AP / IB |
|---|---|---|---|
| A+ or A | 4.0 | 4.5 | 5.0 |
| A− | 3.7 | 4.2 | 4.7 |
| B+ | 3.3 | 3.8 | 4.3 |
| B | 3.0 | 3.5 | 4.0 |
| B− | 2.7 | 3.2 | 3.7 |
| C+ | 2.3 | 2.8 | 3.3 |
| C | 2.0 | 2.5 | 3.0 |
| C− | 1.7 | 2.2 | 2.7 |
| D+ | 1.3 | 1.8 | 2.3 |
| D | 1.0 | 1.5 | 2.0 |
| D− | 0.7 | 1.2 | 1.7 |
| F | 0.0 | 0.5 | 1.0 |
A worked example
One term: Biology 101, B+, 4 credits. Honors Chemistry, A−, 3 credits. English Composition, A, 3 credits.
- Biology 101: 3.3 × 4 = 13.2 points.
- Honors Chemistry: 3.7 × 3 = 11.1 points.
- English Composition: 4.0 × 3 = 12.0 points.
36.3 points ÷ 10 credits = 3.63 on the unweighted 4.0 scale. On Weighted, Honors Chemistry scores (3.7 + 0.5) × 3 = 12.6 points, so the term is 37.8 ÷ 10 = 3.78.
A target of 3.50 with 15 credits left needs (3.50 × 25 − 36.3) ÷ 15 = 3.41 on those credits. Add a prior GPA of 3.40 over 45 credits and the cumulative becomes 189.3 ÷ 55 = 3.44, so the same target needs (3.50 × 70 − 189.3) ÷ 15 = 3.71.
FAQ
Why is my school’s number different?
Your school may differ: no plus/minus, A+ = 4.3, other honors bumps, or a cap on weighted GPA. Repeats, withdrawals and pass/fail follow local policy and are not applied here.
Do P, NP, W or I courses count?
No. Those letters leave the row out of both totals, credits included.
How is the target answer worked out?
Required average = (target × (earned credits + credits left) − earned points) ÷ credits left. Earned figures include prior GPA and prior credits plus this term’s rows.
Which scale should I pick?
Most colleges report unweighted 4.0. Pick Weighted when your high school adds honors or AP points, and 4.3 when A+ is worth more than A.
Are my grades saved?
In this browser only, so a refresh keeps the rows. Copy link puts the rows in a URL you choose to share. Nothing is sent to HALOX Co.