Convert Pa, kPa, bar, standard atmospheres, and psi. Psi uses the international pound, the 0.0254 m inch, and standard gravity.
Convert everyday units without treating unlike systems as the same.
Convert Pa, kPa, bar, standard atmospheres, and psi. Psi uses the international pound, the 0.0254 m inch, and standard gravity.
Convert US mpg, Imperial mpg, L/100 km, and km/L. The two gallons differ, and L/100 km runs opposite to mpg.
Convert latitude and longitude between decimal degrees and degrees, minutes, and seconds. Ranges stay within 90 and 180.
Convert Celsius, Fahrenheit, and Kelvin with the affine formulas. Values below 0 K are rejected.
Convert square metric units, square feet, acres, and square miles using squared length factors. An acre is 43,560 square feet.
Convert liters, cubic meters, US gallons, and Imperial gallons. A US gallon is 3.785411784 L; an Imperial gallon is 4.54609 L.
Convert km/h, mph, m/s, knots, and feet per second. A knot is 1852 m per hour. Miles use 1609.344 m.
Convert bits and bytes between decimal SI units (kB, MB, GB) and binary IEC units (KiB, MiB, GiB). They are not the same.
Convert whole numbers between bases 2 and 36. Optional 0b, 0o, and 0x prefixes. Invalid digits are rejected.
Convert integers 1–3999 to standard Roman numerals and back. Informal spellings such as IIII and IC are rejected.
Convert metric, US, UK, and nautical lengths in the browser using the international yard and the 1852 m nautical mile.
Convert metric mass and avoirdupois pounds, ounces, stone, and US or Imperial tons. The pound is 0.45359237 kg.
