Units

Convert 72 units across length, weight, temperature, area, volume, time, speed and data,…

Convert inches and centimeters in two linked fields, read fractions on a two-sided tape,…

Convert meters and centimeters to feet and inches in three linked fields, with 1/16 inch…

Convert miles and kilometers in two linked fields, with mph to km/h, a two-scale dial an…

Convert acres, square meters, hectares and square feet at once, work out a lot from leng…

Convert liters, gallons, cups, fl oz and cubic feet with a two-scale measuring jug, or f…

Convert gallons, barrels, liters and tonnes at once, compare barrel types and turn an oi…

Convert CCF or HCF to gallons, m³ and liters, see daily use per person against the US av…

Convert between 59 mass units, from kg, lb and stone to troy ounces and catty, using two…

Convert pound-force (lbf) and newtons (N), plus kN and kgf, all at once, with a spring s…

Convert 13 torque units such as N·m, lbf·ft and kgf·m, then see the force at the wrench …

Convert Celsius and Fahrenheit in two linked fields and see exact values, kelvin and Ran…

Convert atm, Pa, hPa, bar, psi, inHg, mmHg and 5 more pressure units at once, and see th…

Convert kWh, kcal, kJ, Btu, toe and 13 more energy units, with power × time and a scale …

Convert kW and watts to horsepower (hp, PS) and back, with motor nameplate ratings and a…

Enter two of voltage, current, power and resistance to get the other two; AC converts W,…

Convert mph, km/h, m/s, knots, Mach and running pace in one go, then see how fast that s…

Convert knots and Mach for a given altitude and temperature, with calibrated (CAS) and t…

Convert degrees and radians as π fractions, plus DMS, gradians and mils, with a draggabl…

Convert Hz, kHz, MHz and GHz with period, wavelength, rpm and rad/s, and see where it fa…

Convert coordinates between decimal degrees and DMS, and see how many meters each digit …

Convert candela, lumens and lux by distance, beam angle or area, with footcandles, OSHA …

Convert Bq, MBq and GBq to Ci, mCi and μCi in one go, with radon pCi/L to Bq/m³ and a si…

Convert US, UK, EU, KR mm and JP/MX cm shoe sizes using Nike, adidas and New Balance cha…

Convert US 8 or men's 40 to UK, EU, Japanese and Korean sizes, or find your size from bu…

Convert basis points, percentage points and decimals, and see how a rate change affects …