Convert between kilograms, pounds, ounces, stone and eight other units at once, including troy ounces for gold
Ounces here are avoirdupois, 28.35 g, the ounce for food and parcels. Gold and silver are priced in troy ounces, 31.10 g.
The Weight Converter takes one value and shows it in twelve units at once: milligrams, grams, kilograms and tonnes, then grains, carats, ounces, pounds, stone, US and UK tons, and troy ounces. It reads weights the way people write them, so 11 st 4 lb from a UK bathroom scale or 7 lb 8 oz from a birth announcement goes in as typed, and the pound and stone results come back in the same compound form under the decimal. Every factor is the exact legal one, starting from the pound of 0.45359237 kg. The ordinary ounce and the troy ounce sit in separate cells, because gold and silver are priced in troy ounces, which are about 10% heavier, and mixing them up is the most expensive mistake a weight conversion can make.
The guide behind this tool
A Troy Ounce Is Heavier Than an Ounce, but a Troy Pound Is Lighter
Troy and avoirdupois share the same grain and group it differently. Why gold is priced per troy ounce, and the 10% error a kitchen ounce puts into a bullion price.
Type a weight, either as a plain number or with its unit, such as 70 kg, 150 lbs, 11 st 4 lb or 5 lb 3 oz.
If you typed a plain number, pick its unit from the "From" dropdown. A unit you typed sets the dropdown for you.
Read the weight in every other unit below, with pounds and stone also shown as lb and oz or st and lb.
Click any result to copy the number, without thousands separators, ready to paste into a spreadsheet.
2.20462262 pounds, which most people round to 2.2. It follows from the definition of the pound, fixed at exactly 0.45359237 kg in 1959, so 1 ÷ 0.45359237 gives the figure to as many places as you want. Going the other way, 1 lb is 453.59237 grams exactly.
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