Free Online Calculators & Tools

Simple, accurate tools you can use right in your browser. No signup, no downloads, no tracking of your inputs.

Grade Percentage Calculator

Work out test percentages, weighted course grades and the final exam score you need. Four modes, instant results.

Percentage Calculator

Calculate percentages, percentage change, and what percent X is of Y.

Date Difference Calculator

Find the number of days, weeks and months between two dates.

Guides & how-tos

How to Calculate a Grade Percentage — Step-by-step formulas and worked examples for tests, weighted categories and final exam targets.