General Calculators

Basic Calculator

A simple, fast calculator for everyday arithmetic.

Tip Calculator

Calculate the tip on your bill and split it between any number of people.

Percentage Calculator

Calculate percentages: what is X% of Y, and what percent change occurred.

Discount Calculator

Calculate the sale price and amount saved for any discount.

Age Calculator

Calculate your exact age in years, months, and days.

Date Calculator

Calculate the number of days between two dates.

Time Calculator

Calculate the duration between two times, or add/subtract hours and minutes.

Average Calculator

Calculate the average, median, and sum of a set of numbers.

Fraction Calculator

Add, subtract, multiply, or divide two fractions.

Ratio Calculator

Simplify a ratio, and solve for a missing value in a proportion.

Unit Converter

Convert between common units of length, weight, volume, and temperature.