GradeArc

GradeArc is the grade curve calculator teachers actually want to use. Enter your class's raw scores, pick a curve method, and see every adjusted grade instantly — no account, no internet, no fuss.

Five scientifically-grounded curve methods:

• Flat Addition — add a fixed number of points to every grade
• Scale to 100 — proportionally lift all scores so the highest becomes 100
• Square Root — boost low scores more than high ones
• Target Mean — scale the entire class to your chosen average (Pro)
• Bell Curve — normalize scores to a target mean and standard deviation (Pro)

Instant statistics for every calculation: original and curved averages, highs, lows, and letter grades for every student.

Pro features (one-time unlock):

• Unlimited grades per session
• Batch paste — paste a comma-separated list in one tap
• Session history — save and revisit past calculations
• Export to CSV or share via any app

Fully offline. No account. No data collection. Your grades stay on your device.