Grade Percentage Calculator

Formula

grade percentage = (points earned ÷ points possible) × 100

Points possible must be greater than zero. Scores above the maximum are allowed so extra credit can produce a result over 100%.

Worked example

1. 1. Start with 36 points earned out of 40 possible.
2. 2. Divide 36 by 40 to get 0.9.
3. 3. Multiply 0.9 by 100 to get 90%.
4. 4. 90% maps to an estimated A on the standard 90/80/70/60 scale; you missed 4 points.

Letter-grade scales

• Standard A–F: A starts at 90%, B at 80%, C at 70%, and D at 60%.
• Plus/minus: uses common bands such as A+ at 97%, A at 93%, A− at 90%, and matching three-to-four-point bands below.
• Check your course: institutions and instructors may use different thresholds, weighting, curves, or pass requirements.