Grade Calculator
Calculate your final grade from assignments and weights.
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How It Works
Calculates your grade percentage from earned points vs total possible, then assigns a letter grade. Formula: Grade% = (Score ÷ Total) × 100. A=90%+, B=80-89%, C=70-79%, D=60-69%, F=<60%.
Formula
Grade = Sum(Score x Weight)Quick Reference
Common calculations — results you can verify instantly.
90/100 points
90/100×100
90% = A
75/100 points
75/100×100
75% = C
42/50 quiz
42/50×100
84% = B
Tips & Shortcuts
Weight different assignments: exam 60%, homework 40% — use weighted average.
Calculate what you need on the final: missing points needed = (target% × total) - current points.
Know your syllabus grading scale — some use 93%+ for A, others 90%+.
Common Mistakes
Adding scores without weighting by point values
A 50-point exam matters more than a 10-point quiz. Calculate percentage, not raw sum.
Not knowing the exact grading scale
Different instructors use different cutoffs. Ask for the exact grading scale.
Frequently Asked Questions
Calculate: (Target grade × total possible) - current points = points needed on final.
Typically 70-79% in US schools. Some schools use 73%+ as C+ and 70-72% as C-.
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