#measurement

The UN/ECE Recommendation 20 unit-of-measure codes — the codes used to identify units of measure in trade documents, invoices and EDI messages — as an API. The reference a customs, ERP or e-invoicing system needs. Each unit (for example KGM = kilogram, MTR = metre, LTR = litre, C62 = one/each, TNE = tonne, MTK = square metre) carries a 2–3 character common code, a name, the unit symbol, a description and a status (active or deprecated). Look a code up, reverse-look-up the code(s) for a symbol (kg → KGM), search by name or symbol, or list every code filtered by status. This is the unit-of-measure CODE register — distinct from unit-api, which performs unit-conversion maths. Served from memory — always fast.

api.oanor.com/unitcodes-api

Snelle, deterministische eenheidsconversie in 10 categorieën — lengte, massa, temperatuur, oppervlakte, volume, snelheid, tijd, digitale opslag, druk en energie. Converteer elke waarde tussen compatibele eenheden en bekijk de volledige eenhedencatalogus per categorie. Volledig lokale berekening (geen externe upstream), dus reacties zijn onmiddellijk en altijd beschikbaar. Ideaal voor rekenmachines, e-commerce, logistiek, technische tools, dashboards en chatbots.

api.oanor.com/unit-api