Math Calculators

Percentages, averages, ages, and dates — quick answers with the formula and worked steps.

GPA Calculator

Add a row per course and get your credit-weighted grade point average on the standard 4.0 scale.

Find the time between two dates in years, months, weeks, and days — or add and subtract days from any date.

Three tools in one: percent of a number, what percent X is of Y, and percentage increase or decrease.

Find your exact age in years, months, and days, plus total days, weeks, and hours lived.