Unit Conversion Calculators
Length, weight, temperature, speed, volume, and other unit conversion calculators.
Unit conversion is one of the most common everyday calculations — cooking recipes, travel abroad, science homework, engineering specs, and fitness tracking all require converting between measurement systems. Our unit converters handle length, weight, temperature, volume, speed, pressure, energy, and more.
Each converter supports multiple units with precise conversion factors. See results instantly as you type, with common conversions like Celsius to Fahrenheit, kg to lbs, and meters to feet just a click away.
Whether you need metric-to-imperial conversions for a school project or fuel economy comparisons (MPG vs. L/100km) for your next car purchase, find the right converter below. Free, fast, and accurate.
Everyday conversions
Length, weight, temperature, volume, speed, and cooking measurements (cups, tbsp, ml).
Science & engineering
Pressure, energy, power, force, density, frequency, torque, and flow rate units.
Digital & data
Bytes, kilobytes, megabytes, gigabytes, and terabytes with binary and decimal standards.
Specialized units
Fuel economy, angles (degrees/radians), illuminance (lux), and time unit conversions.
All Unit Conversion Tools
20 free calculators — click any tool to open it instantly.
Length Converter
Convert between meters, feet, inches, miles, kilometers, yards, and other length units instantly.
Weight Converter
Convert between kilograms, pounds, ounces, grams, stones, and other weight/mass units.
Temperature Converter
Convert between Celsius, Fahrenheit, and Kelvin temperature scales with formulas explained.
Speed Converter
Convert between mph, km/h, knots, meters per second, and other speed units.
Volume Converter
Convert between liters, gallons, cups, milliliters, fluid ounces, and other volume units.
Area Converter
Convert between square meters, square feet, acres, hectares, and other area units.
Pressure Converter
Convert between PSI, bar, Pascal, atmospheres, mmHg, and other pressure units.
Energy Converter
Convert between joules, calories, kilowatt-hours, BTU, and other energy units.
Data Storage Converter
Convert between bytes, kilobytes, megabytes, gigabytes, terabytes, and other data units.
Time Unit Converter
Convert between seconds, minutes, hours, days, weeks, months, and years.
Fuel Economy Converter
Convert between MPG, L/100km, km/L, and other fuel efficiency measurements.
Angle Converter
Convert between degrees, radians, gradians, arcminutes, and arcseconds.
Power Converter
Convert between watts, kilowatts, horsepower, BTU/h, and other power units.
Frequency Converter
Convert between hertz, kilohertz, megahertz, gigahertz, and RPM frequency units.
Force Converter
Convert between newtons, pound-force, dynes, kilogram-force, and other force units.
Cooking Converter
Convert between cups, tablespoons, teaspoons, milliliters, and other cooking measurements.
Torque Converter
Convert between Newton-meters, foot-pounds, inch-pounds, and other torque units.
Density Converter
Convert between kg/m³, lb/ft³, g/cm³, g/mL, and other density units.
Flow Rate Converter
Convert between liters per minute, gallons per minute, cubic meters per hour, and other flow units.
Illuminance Converter
Convert between lux, foot-candles, phot, and other illuminance/light intensity units.