Hundredweight (long) to Kilograms Converter

About this calculator

The long hundredweight (also called the imperial hundredweight, abbreviated cwt) equals 112 pounds — historically one-twentieth of a long ton — and converts to 50.80235 kg. It's distinct from the US "short" hundredweight, which is simply 100 lb (45.36 kg); the "long" version is the one still used in the UK, Ireland, and parts of the Commonwealth.

The unit survives mainly in British and Irish agriculture (crop yields, livestock feed, fertilizer sold by the cwt) and in historical trade and shipping records, so anyone working with UK farm data, older commodity contracts, or Commonwealth-era documents needs the long hundredweight conversion to reconcile figures with metric kilograms.