Unit Conversion Calculators
Convert between common units of length, weight, temperature, volume, area, and speed.
Currency Converter
Convert between 147 world currencies using rates last updated November 2, 2026.
Angle Converter
Convert between degrees, radians, gradians, arcminutes, arcseconds, and revolutions.
Pressure Converter
Convert between Pascals, bar, PSI, atmospheres, Torr, and inches of mercury.
Power Converter
Convert between watts, kilowatts, horsepower, BTU per hour, and foot-pounds per second.
Energy Converter
Convert between joules, calories, kilowatt-hours, BTU, and foot-pounds.
Fuel Economy Converter
Convert between MPG (US and UK), L/100km, km/L, and miles per liter.
Cooking Measurement Converter
Convert between teaspoons, tablespoons, cups, fluid ounces, milliliters, and liters.
Clothing & Shoe Size Converter
Convert men's and women's shoe sizes and women's dress sizes between US, UK, EU, and cm.
Torque Converter
Convert between newton-meters, pound-force feet, pound-force inches, and kilogram-force meters.
Force Converter
Convert between newtons, pound-force, kilogram-force, dynes, and poundals.
Frequency Converter
Convert between hertz, kilohertz, megahertz, gigahertz, and RPM.
Density Converter
Convert between kg/m³, g/cm³, g/mL, lb/ft³, and lb/gallon.
Flow Rate Converter
Convert between cubic meters/second, liters/second, liters/minute, GPM, and cubic feet/second.
Viscosity Converter
Convert between Pascal-seconds, poise, and centipoise (dynamic viscosity).
Acceleration Converter
Convert between m/s², standard gravity (g), ft/s², and km/h per second.
Astronomical Distance Converter
Convert between kilometers, miles, astronomical units, light-years, and parsecs.
Illuminance (Light) Converter
Convert between lux and foot-candles for measuring light levels.
Unit Converter
Convert between common units of length, weight, volume, area, speed, and temperature.
Data Storage Converter
Convert between bits, bytes, KB, MB, GB, and TB — with a toggle for decimal (1000-based) vs binary (1024-based) units.
About these calculators
This category collects unit and currency converters that mostly work the same way: pick a value, choose what you are converting from and to, and the answer appears as you type. Currency Converter covers the currencies in its list using a daily rate table that is refreshed when the site is rebuilt, not a live feed. Several converters deal with engineering and science units: pressure, power, energy, force, torque, density, flow rate, viscosity, frequency, acceleration and illuminance. Others cover everyday needs: fuel economy, cooking measurements, clothing and shoe sizes, data storage and astronomical distances. Angle Converter and Unit Converter round out the set.
Most of the converters pass every value through one base unit and show up to six decimal places, so very small answers can display as 0 and very large ones appear in full. Fuel Economy Converter handles US and UK miles per gallon, liters per 100 km, kilometers per liter and miles per liter. Data Storage Converter has a switch between decimal 1000-based and binary 1024-based units. Clothing and Shoe Size Converter covers men's and women's shoe sizes and women's dress sizes, between US, UK, EU and centimeter measures. Each page lists its units and limits, and the conversions run in your browser.
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