Free online calculators for math, money, health, and life.

Fast, accurate, no sign-up. Pick a calculator below or search for what you need.

Math Financial Fitness & Health Color Tools Other

Math

Basic Calculator

A standard calculator for everyday arithmetic.

Scientific Calculator

Trigonometry, logarithms, powers, and more.

Percentage Calculator

Find percentages, increases, and differences.

Fraction Calculator

Add, subtract, multiply, and divide fractions.

Financial

Mortgage Calculator

Estimate monthly payments on a home loan.

Mortgage Calculator (Canada)

Canadian mortgage payments with semi-annual compounding, CMHC insurance, and payment frequency options.

Loan Calculator

Calculate payments for any fixed-term loan.

Interest Calculator

Simple and compound interest projections.

Sales Tax Calculator

Find the final price including sales tax.

Fitness & Health

BMI Calculator

Body Mass Index from height and weight.

Calorie Calculator

Daily calorie needs based on your activity level.

Body Fat Calculator

Estimate body fat percentage using the U.S. Navy method.

Pregnancy Due Date Calculator

Estimate a due date from the last period.

Color Tools

Color Picker

Pick a color and get its HEX, RGB, and HSL codes, plus shades, tints, and harmonies.

Contrast Checker

Check text and background contrast against WCAG AA and AAA accessibility standards.

Color Mixer

Blend two colors and explore the in-between shades.

Other

Age Calculator

Find exact age in years, months, and days.

Date Calculator

Add or subtract days from a date, or find the difference.

GPA Calculator

Calculate grade point average from courses and credits.

Unit Converter

Convert length, weight, and temperature units.