Unit Converters Calculators
Every measurement system — length, weight, temperature and beyond. 19 free tools and counting.
Every converter here works the same way: your value is expressed in a base unit, then re-expressed in the target unit, with both steps shown. Metric to imperial, kitchen spoons to millilitres, currency at live mid-market rates — pick a converter and every equivalent unit is listed at once.
Length Converter
Convert between mm, cm, m, km, inches, feet, yards and miles.
Weight Converter
Convert between grams, kilograms, pounds, ounces and stone.
Temperature Converter
Convert between Celsius, Fahrenheit and Kelvin.
Area Converter
Convert between m², km², square feet, acres and hectares.
Volume Converter
Convert between millilitres, litres, cups, pints and gallons.
Speed Converter
Convert between km/h, mph, m/s and knots.
Data Storage Converter
Convert between bits, bytes, KB, MB, GB and TB.
Pressure Converter
Convert between pascals, bar, psi, atm, mmHg and Torr.
Energy Converter
Convert between joules, calories, watt-hours, kWh and BTU.
Power Converter
Convert between watts, kilowatts, horsepower and BTU/h.
Angle Converter
Convert between degrees, radians, gradians, arcminutes and turns.
Cooking Converter
Convert between teaspoons, tablespoons, cups, fluid ounces and millilitres.
Currency Converter
Convert between major world currencies using live mid-market exchange rates.
Fuel Economy Converter
Convert between MPG (US/UK), km/L and L/100km — including the inverse L/100km scale.
Density Converter
Convert density between kg/m³, g/cm³, lb/ft³ and more.
Force Converter
Convert force between newtons, kilogram-force, pounds-force and dynes.
Torque Converter
Convert torque between N·m, lbf·ft, lbf·in and kgf·m.
Flow Rate Converter
Convert flow between L/s, L/min, m³/h, GPM and CFM.
Shoe Size Converter
Convert shoe sizes between US, UK, EU and Japanese (cm) systems.