Weight converter
Type a value and pick the starting unit: pounds, ounces, stone, kilograms, grams and hectograms all update in real time.
Handy references
| 1 pound | 453.6 g |
| 1 ounce | 28.35 g |
| 1 stick of butter (US) | 4 oz ≈ 113 g |
| 1 stone (body weight, UK) | 14 lb = 6.35 kg |
| 1 kilogram | 2.205 lb |
Pounds, ounces and stone: how the imperial units fit together
One pound (lb) is exactly 453.6 grams and splits into 16 ounces of 28.35 grams each, so the "8 oz of butter" in a recipe is about 227 grams, or two US sticks. In the UK, body weight is usually given in stone: 1 stone equals 14 pounds (6.35 kg), so someone who weighs "11 stone" is about 154 lb or 70 kg. One thing to watch out for: the weight ounce is not the fluid ounce (fl oz), which measures volume and equals roughly 29.6 ml.
Going metric: kilograms, grams and the rarely-seen hectogram
The metric system scales by powers of ten, which makes mental math easy: 1 kilogram is 1,000 grams and about 2.2 pounds, so a quick trick is to double the kilograms and add 10% to get pounds. The hectogram (100 grams, roughly 3.5 oz) is almost never used in English-speaking countries, but in Italy it is the everyday unit at the deli counter, handy to know if you ever shop for prosciutto abroad, where prices are often listed per hectogram rather than per kilo.