Unit Conversion Calculators

Length Converter

Convert between kilometers, meters, centimeters, millimeters, miles, yards, feet, inches, and nautical miles instantly.

Weight Converter

Convert between kilograms, pounds, grams, ounces, metric tons, US tons, and stones instantly.

Temperature Converter

Convert between Celsius, Fahrenheit, Kelvin, and Rankine. Instant temperature conversion with formulas.

Volume Converter

Convert between liters, gallons, quarts, pints, cups, fluid ounces, tablespoons, cubic feet, and more.

Area Converter

Convert between square feet, square meters, acres, hectares, square miles, square yards, and more.

Speed Converter

Convert between miles per hour, kilometers per hour, meters per second, feet per second, knots, and Mach.

Energy Converter

Convert between joules, kilojoules, calories, kilocalories, watt-hours, kilowatt-hours, BTU, and electronvolts.

Pressure Converter

Convert between pascal, PSI, bar, atm, mmHg, and more. Covers tire pressure, blood pressure, and weather use cases.

Time Converter

Convert between seconds, minutes, hours, days, weeks, months, years, decades, and centuries instantly.

Data Storage Converter

Convert between bits, bytes, kilobytes, megabytes, gigabytes, terabytes, and petabytes. Shows both binary (1024) and SI (1000) values.

Angle Converter

Convert between degrees, radians, gradians, arcminutes, arcseconds, and turns (revolutions).

Currency Converter

Convert between major world currencies including USD, EUR, GBP, JPY, CAD, AUD, CHF, CNY, INR, and more.

Cooking Measurement Converter

Convert cooking measurements between teaspoons, tablespoons, cups, fluid ounces, milliliters, and liters. Includes grams-to-cups for common ingredients.

Fuel Economy Converter

Convert fuel economy between MPG (US), MPG (UK), L/100km, and km/L. Includes annual fuel cost estimate.

Power Converter

Convert between watts, kilowatts, megawatts, horsepower, BTU/hour, calories/second, and foot-pounds/second.

Shoe Size Converter

Convert shoe sizes between US, UK, EU, Japanese, and Mondopoint sizing for men and women.

Tire Size Calculator

Compare tire sizes, calculate overall diameter, sidewall height, circumference, and revolutions per mile from any tire code.

Density Calculator

Calculate density from mass and volume, solve for mass or volume, and look up densities of common materials.