Weight Converter
Convert between any weight units including stone (UK body weight), pounds (US), kilograms (global), troy ounces (precious metals), and carats (gemstones).
| Country | Body Weight Unit | Food Weight | Bulk (cargo) |
|---|---|---|---|
| 🇺🇸 United States | Pounds (lbs) | Ounces / pounds | Short tons (2,000 lb) |
| 🇬🇧 United Kingdom | Stone & pounds | Grams / kg (official) | Metric tonnes |
| 🇦🇺 Australia | Kilograms | Grams / kg | Metric tonnes |
| 🇨🇦 Canada | Kilograms (official) | Grams / kg | Metric tonnes |
| 🇩🇪 Germany / EU | Kilograms | Grams / kg | Metric tonnes |
| 🇮🇪 Ireland | Stone & kg (mixed) | Grams / kg | Metric tonnes |
Why Does the UK Use Stone for Body Weight?
The stone (14 lbs) is a medieval English measurement. While the UK officially uses kilograms, the stone persists culturally for body weight — particularly on bathroom scales and in NHS documentation. According to UK surveys, over 70% of British adults still primarily think of their weight in stone and pounds rather than kilograms. Ireland also uses stone informally. All other countries use kilograms or pounds.
Frequently Asked Questions
What is the difference between US ton and UK tonne?
US short ton: 2,000 lb = 907.185 kg. Metric tonne (used in the UK, EU, Australia): 1,000 kg = 2,204.62 lb. UK long ton (historical): 2,240 lb = 1,016.05 kg. The difference between a US ton and a metric tonne is about 10%. For bulk commodity trading (grain, coal, steel), this difference matters significantly when comparing international prices.
What is a troy ounce and how does it differ from a regular ounce?
A troy ounce (ozt) = 31.1035 grams = 1.0971 avoirdupois ounces. The regular ounce (used in the US for food and body weight) = 28.3495 grams. Troy ounces are used worldwide for pricing precious metals — gold, silver, platinum, and palladium are all quoted in troy ounces on all commodity exchanges globally, regardless of country. 1 troy pound = 12 troy ounces (not 16).