Converters

About these tools

All 62 tools in this section are free, work in your browser on any device, and need no sign-up.

• Unit converter: Convert length, weight, temperature, area, volume, speed, pressure, energy, data and more, with a table of every unit.
• Length converter: Convert metres, centimetres, millimetres, kilometres, inches, feet, yards and miles, with a full table and the formula.
• Weight converter: Convert kilograms, grams, pounds, ounces, stones, carats and tonnes, with a conversion table.
• Temperature converter: Convert Celsius, Fahrenheit, Kelvin and Rankine, with the formula and a table of common temperatures.
• Area converter: Square metres, square feet, acres, hectares, dunams, feddans and more, with a full table.
• Volume converter: Litres, millilitres, gallons, cups, fluid ounces, cubic metres and oil barrels, US and UK units.
• Speed converter: Convert km/h, mph, m/s, knots and Mach, with a table of common speeds.
• Pressure converter: Convert bar, psi, kPa, atm and mmHg, for tyres, weather and engineering.
• Energy converter: Convert joules, calories, kilocalories, kWh, BTU and electronvolts.
• Power converter: Convert watts, kilowatts, horsepower and BTU/h, plus tons of refrigeration for air conditioners.
• Data size converter: Convert bytes, KB, MB, GB and TB, and the binary KiB, MiB and GiB that computers really use.
• Internet speed converter: Convert Mbps to MB/s and every other data transfer rate, to see real download speeds.
• Angle converter: Convert degrees, radians, gradians, turns, arcminutes and arcseconds.
• Fuel economy converter: Convert L/100 km, km/L and miles per gallon (US and UK).
• Torque converter: Convert newton-metres, pound-feet, pound-inches and kilogram-force metres.
• Time unit converter: Convert seconds, minutes, hours, days, weeks, months and years, with a days-hours-minutes breakdown.
• Density converter: Convert kg/m³, g/cm³, g/mL, lb/ft³ and pounds per gallon.
• Flow rate converter: Convert litres per minute, cubic metres per hour, gallons per minute and CFM.
• Number base converter: Convert between binary, octal, decimal, hexadecimal and any base from 2 to 36. Works with very large numbers.
• Roman numeral converter: Turn numbers into Roman numerals and back (1 to 3999), with a chart.
• Number to words: Write any number in words: plain, for cheques (and 45/100), as money or as an ordinal (first, second).
• Time zone converter: See one time in several cities at once. Daylight saving time is handled automatically.
• Currency converter: Convert 160+ currencies with today's exchange rates, including AED, SAR, EGP, JOD and KWD.
• Cooking measurement converter: Cups to grams, tablespoons to ml and more, for flour, sugar, butter, rice and other ingredients.
• Fraction to decimal converter: Turn fractions into decimals and decimals into fractions, with repeating decimals shown exactly.
• Fraction to percent converter: Convert between fractions, decimals and percentages in one step.
• Scientific notation converter: Write numbers in scientific, E and engineering notation, or turn them back into full decimals.
• GPS coordinates converter: Convert latitude and longitude between decimal degrees and degrees, minutes and seconds.
• Wavelength to frequency converter: Convert frequency and wavelength, with photon energy and the part of the spectrum.
• Running pace calculator: Pace per km and per mile, speed, and predicted 5K, 10K, half marathon and marathon times.
• Shoe size converter: US, UK, EU and cm shoe sizes for men and women, in one chart.
• Clothing size converter: Women's dress and men's suit and shirt sizes across US, UK, EU and Italy.
• Ring size converter: US, UK and EU ring sizes, and your size from a ring's diameter or your finger's circumference.
• Bra size calculator: Find your bra size from two measurements, and convert between US, UK and EU sizes.
• Belt size converter: Find the right belt size from your trouser size, in inches and cm.
• Hat size converter: Hat sizes from your head measurement: cm, inches, US, UK and S/M/L.
• Glove size converter: Find your glove size from your hand measurement, for men and women.
• CM to inches: Convert centimetres to inches instantly. 1 cm = 0.3937 in, with a conversion table and the formula.
• Inches to CM: Convert inches to centimetres instantly. 1 in = 2.54 cm, with a conversion table and the formula.
• KG to LBS: Convert kilograms to pounds instantly. 1 kg = 2.2046 lb, with a conversion table.
• LBS to KG: Convert pounds to kilograms instantly. 1 lb = 0.4536 kg, with a conversion table.
• Celsius to Fahrenheit: Convert °C to °F instantly, with the formula (°F = °C × 9/5 + 32) and a table of common temperatures.
• Fahrenheit to Celsius: Convert °F to °C instantly, with the formula (°C = (°F − 32) × 5/9) and a table.
• Meters to feet: Convert metres to feet (and feet + inches) instantly. 1 m = 3.2808 ft.
• Feet to meters: Convert feet to metres instantly. 1 ft = 0.3048 m, with a conversion table.
• KM to miles: Convert kilometres to miles instantly. 1 km = 0.6214 mi, with a conversion table.
• Miles to KM: Convert miles to kilometres instantly. 1 mi = 1.6093 km, with a conversion table.
• CM to feet: Convert your height from centimetres to feet and inches (e.g. 175 cm = 5 ft 8.9 in).
• Feet to CM: Convert feet to centimetres instantly. 1 ft = 30.48 cm, with a height table.
• MM to inches: Convert millimetres to inches instantly. 1 mm = 0.03937 in.
• Inches to MM: Convert inches to millimetres instantly. 1 in = 25.4 mm.
• Grams to ounces: Convert grams to ounces instantly. 1 g = 0.03527 oz, with a kitchen table.
• Ounces to grams: Convert ounces to grams instantly. 1 oz = 28.35 g, with a kitchen table.
• ML to fl oz: Convert millilitres to US fluid ounces instantly. 1 fl oz = 29.57 ml.
• Liters to gallons: Convert litres to US gallons (or UK gallons) instantly. 1 gal = 3.785 L.
• Gallons to liters: Convert US gallons to litres instantly. 1 gal = 3.785 L.
• KM/H to MPH: Convert kilometres per hour to miles per hour instantly. 100 km/h = 62.14 mph.
• MPH to KM/H: Convert miles per hour to kilometres per hour instantly. 60 mph = 96.56 km/h.
• Square feet to square meters: Convert ft² to m² instantly, for rooms, flats and land. 1 ft² = 0.0929 m².
• Acres to hectares: Convert acres to hectares instantly. 1 acre = 0.4047 ha.
• MB to GB: Convert megabytes to gigabytes (and to GiB) instantly. 1000 MB = 1 GB.
• UTM, geohash and Plus Code converter: Convert coordinates between decimal degrees, degrees-minutes-seconds, UTM, geohash and Plus Codes.