Unit Converters

Convert mm, cm, m, km, inches, feet, yards and miles with formulas and reference values.

Convert metric and imperial weight units with formulas and stone-plus-pound output.

Convert four temperature scales with formulas, references and absolute-zero warning.

Convert square meters, square feet, acres, hectares and other area units with formulas and precise reference values.

Convert liters, milliliters, cubic meters, cubic feet, US and imperial gallons, cups and cooking volume units with precise formulas.

Convert mph, km/h, m/s, ft/s, knots, Mach and running pace with precise formulas, references and practical examples.

Convert nanoseconds, microseconds, milliseconds, seconds, minutes, hours, days, weeks, average months and years with a readable duration breakdown.

Convert exact integers between bases 2 and 36 with BigInt precision, validation, binary, octal, decimal, hex, Unicode hints and calculation steps.

Convert Unix timestamps in seconds or milliseconds to UTC, local time and fixed offsets, or convert a local date and time back to a Unix timestamp.

Convert bits, bytes, decimal KB through PB and binary KiB through PiB. Compare SI and IEC storage units with formulas, examples and exact byte references.