Every factor on AllKindsOfConverters comes from a published international standard. This hub explains what those standards are, who maintains them and how they apply to the tools you use.
The metre, kilogram, second, ampere, kelvin, mole and candela. Every derived unit on the platform is built from these seven.
Modern imperial units are defined legally in terms of SI. The inch is exactly 25.4 mm; the pound is exactly 0.453 592 37 kg.
Kilo (10³), mega (10⁶), giga (10⁹) and friends scale base units cleanly. The kibibyte / mebibyte (2¹⁰, 2²⁰) live in IEC 80000-13.
ISO 80000 governs quantity symbols across engineering, ensuring a pascal is a pascal and a newton-metre is unambiguous.
The modern metric system. Defines the seven base units (metre, kilogram, second, ampere, kelvin, mole, candela) from which every derived unit on this site is built.
International standard governing the names, symbols and definitions of physical quantities and units used in science, technology and engineering.
Authoritative U.S. guide to SI usage, including conversion factors between U.S. customary units and SI units.
U.S. legal reference for commercial weights and measures. Underpins the pound, ounce and U.S. survey foot conversions.
Defines the modern Kelvin and Celsius scales using fixed reference points. All temperature conversions on this site follow ITS-90.
Defines the difference between decimal (kB, MB, GB) and binary (KiB, MiB, GiB) data units used by the data-storage converter.
Modern legal definition of the UK imperial yard, pound and gallon in terms of SI base units.
The Trust Center walks through how we derive each conversion factor, round results and review tools over time.
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