Tools

Math Tools

Free, browser-based utilities — no signup required. Pick a tool and get started.

Percentage Calculator

Calculate percentages, percent change, and add or subtract percent.

Split a bill with tip across any number of people, instantly.

Find your exact age in years, months, days, and a countdown to your next birthday.

Find the exact time span between two dates in years, months, days, and more.

Calculate body mass index (BMI) with metric or imperial units and see your category.

Calculate your grade point average (GPA) on a 4.0 scale from course grades and credits.