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Unit Converters
Length, weight, temperature, area, data and regional units, using exact definitions.
Convert between metric, imperial and regional units using exact published definitions. Each page explains where the units come from and the mistakes people make, such as mixing US and imperial gallons.
Length ConverterConvert mm, cm, m, km, inches, feet, yards, miles and nautical miles with exact factors.Weight ConverterConvert kg, g, lb, oz, stone, tonnes, short and long tons, troy ounces and carats.Area ConverterConvert m², ft², yd², acres, hectares, km² and square miles with exact factors.Volume ConverterLitres, millilitres, US and imperial gallons, pints, cups, fluid ounces and cubic units.Temperature ConverterConvert Celsius, Fahrenheit, Kelvin and Rankine with exact formulas and a physical check.Speed ConverterConvert km/h, mph, m/s, knots, ft/s, Mach and the speed of light with exact factors.Pressure ConverterConvert pascal, kPa, MPa, bar, mbar, atm, psi, torr, mmHg and kgf/cm² accurately.Energy ConverterJoules, kJ, calories, kcal, Wh, kWh, BTU, ft·lbf and electronvolts, with exact factors.Power ConverterWatts, kW, MW, mechanical hp, metric hp, BTU per hour, kcal per hour and ft·lbf per second.Time ConverterConvert ms, seconds, minutes, hours, days, weeks, average months and years.Data Storage ConverterBits, bytes, decimal KB to PB and binary KiB to PiB, with the two prefix systems kept distinct.Fuel Economy ConverterConvert mpg (US and imperial), km/L and L/100 km, handling the inverse relationship correctly.Angle ConverterDegrees, radians, gradians, turns, arcminutes, arcseconds and milliradians in one place.Force ConverterNewtons, kN, kgf, gf, lbf, ozf, poundals and dynes using standard gravity 9.80665 m/s².Cooking ConverterCups, spoons, mL, grams and ounces for flour, sugar, butter and more, with approximate densities.Unit Conversion CalculatorOne converter for length, weight, temperature, area, volume, speed, pressure, energy, power and more.Marla and Kanal ConverterMarla, kanal, sq ft, sq yd, m² and acres, with a selectable marla size of 225, 250 or 272.25 sq ft.Gold Tola ConverterConvert tola, masha, ratti, grams and troy ounces, and find pure gold content by karat. No prices.Number to Words ConverterSpell any number up to 999 trillion in words, with international and lakh/crore versions side by side.
More converters on PakMath
PakMath, a sister project of Adzita, publishes ready-made tables for length, weight and mass, temperature, area, volume, speed and currency conversions.
Accuracy note: Factors use the standard definitions stated on this page. Results are rounded for display; for engineering or legal work use the full-precision factors.