Free tools

Grade calculators and converters

Quick tools for the math students check before deciding what to study next.

Weighted grade calculator

Calculate your current course grade from categories, weights, and scored assignments.

Grade letter converter

Convert percentages to letter grades and GPA points on standard or plus-minus scales.

CGPA converter

Convert international GPA and CGPA scales to a US 4.0 estimate.

Course grade calculators

Find a calculator tailored to common college courses and school-specific pages.