Convertisseur de kg en livres

Type a weight in kilograms and the page divides it by 0.45359237. That number is the legal definition of the international pound, agreed in 1959, so the answer is exact rather than estimated. Dividing by it is the same as multiplying by 2.2046226218, which is where the familiar 2.2 shortcut comes from.

The shortcut is where most errors start. At 5 kg it lands about a third of an ounce out and nobody notices. At 100 kg it is short by almost half a pound, which is enough to matter at an airline weigh-in or on a shipping label. This page carries the full factor through every calculation and prints the working under the result so you can check it.

One decimal pound figure is rarely the whole answer. A US scale shows 154 lb 5.2 oz. A British scale shows 11 st 0.3 lb. Both describe the same 70 kg. The result panel gives all three readings at once, plus grams for recipes and postage, instead of sending you off to a second converter.

Hit the swap button and the page becomes a pounds to kilograms converter, multiplying instead of dividing. The decimal control moves the precision from a whole number up to four places for lab work.

Under the calculator sits a chart of weights people look up most: baggage limits, gym plates, sacks of cement, and body weights from 40 kg to 100 kg. Everything runs in your browser, so nothing you type leaves the page.