Free, fast calculators for everyday life
No sign-up, no clutter — just accurate calculators that work instantly in your browser.
All calculators
Age Calculator
Calculate exact age in years, months, and days from a date of birth. Also shows the number of days until your next birthday.
BMI Calculator
Calculate your Body Mass Index (BMI) using metric (kg/cm) or imperial (lb/ft+in) units, with WHO weight category ranges.
Percentage Calculator
Calculate percentages instantly: find X% of a number, work out what percent one number is of another, or calculate percentage increase and decrease.