All Conversions

Every one of the 1,256 conversion pages on this site, grouped by category.

• Length and Distance ConverterConvert between metric and imperial units of length — millimeters, centimeters, meters, kilometers, inches, feet, yards and miles.
• Weight and Mass ConverterConvert between kilograms, grams, pounds, ounces, stones and tons. Exact factors based on the international pound of 0.45359237 kg.
• Temperature ConverterConvert Celsius, Fahrenheit, Kelvin and Rankine. Temperature scales have different zero points, so they are converted with a formula rather than a simple ratio.
• Volume and Capacity ConverterConvert liters, milliliters, gallons, cups, fluid ounces, tablespoons and teaspoons. US and imperial measures are listed separately because they differ by about 20%.
• Area ConverterConvert square feet, square meters, acres, hectares and every other common unit of area.
• Speed and Velocity ConverterConvert miles per hour, kilometers per hour, meters per second, knots and mach. Exact factors based on the international mile and the nautical mile.
• Time ConverterConvert seconds, minutes, hours, days, weeks, months and years.
• Digital Storage ConverterConvert bytes, KB, MB, GB, TB and bits using the binary (1024) convention that operating systems report.
• Pressure ConverterConvert psi, bar, pascal, kPa, atmospheres, mmHg and torr.
• Energy and Work ConverterConvert joules, calories, kilocalories, kWh, BTU and electronvolts.
• Power ConverterConvert watts, kilowatts, horsepower, megawatts and BTU per hour.
• Torque ConverterConvert Nm to ft-lbs, in-lbs, kgf-m and back. Torque figures are what every fastener specification and wrench setting is quoted in.
• Angle ConverterConvert degrees, radians, gradians, arcminutes and arcseconds.
• Frequency ConverterConvert hertz, kilohertz, megahertz, gigahertz and RPM.
• Force ConverterConvert newtons, kilonewtons, pound-force, kilogram-force and dynes.
• Fuel Economy ConverterConvert MPG, L/100km and km/L. US and imperial gallons differ, so US MPG and UK MPG are listed separately.
• Data Transfer Rate ConverterConvert Mbps, Gbps, MB/s and other network and download speed units.
• Height Converter — Feet and Inches to cmPassport, visa and medical forms ask for height in centimetres; the US and UK still state it in feet and inches. Convert either way below.
• Stone and Pounds to kg ConverterThe UK and Ireland state body weight in stone and pounds; almost everywhere else uses kilograms. Convert either way below.
• Number Base ConverterConvert between hexadecimal, decimal, binary and octal, with arbitrary precision so 64-bit values stay exact.