Free Online Calculator for Every Calculation
A free calculator for math, percentages, currency, finance, and more. No sign-up, no ads, just fast and accurate answers.
Press Ctrl + K anywhere on the site to jump straight to a calculator.
Click buttons or type directly into the display — ^ for power, ! for factorial, pi/e for constants.
Popular calculators
Free Mortgage Calculator
Estimate your monthly mortgage payment, including taxes, insurance and HOA.
BMI Calculator
Calculate Body Mass Index and see your weight category.
Percentage Calculator
Find a percentage of a number, what percent one number is of another, or percent change.
Free Compound Interest Calculator
See how your savings grow with compounding and optional monthly contributions.
Age Calculator
Calculate exact age in years, months and days from a birth date.
Free Tip Calculator
Split the bill and calculate the tip per person.
Calorie Calculator
Estimate your daily calorie needs to maintain, lose or gain weight.
Free Loan Calculator
Work out the monthly payment and total interest on any fixed-rate loan.