Converting weight and mass
Weight conversions run through a base unit — here, the gram. Each unit has a defined size (a pound is 453.59237 g, an ounce is 28.3495 g), so the value is expressed in grams and then divided by the target unit. The pound and ounce factors are the international avoirdupois definitions.
Kitchen, shipping and body weight
The same tool covers recipes in grams, parcels in pounds, and body weight in kilograms or stones. Switching between kilograms and pounds is the most common need, and the conversion is exact rather than the rough "times two" shortcut.
Mass vs. weight
Strictly, these units measure mass, and "weight" in everyday use means the same thing on Earth's surface. The conversions here are between mass units, which is what scales and labels report.
Frequently asked questions
How many pounds in a kilogram?
About 2.2046 pounds. One pound is exactly 453.59237 grams.
What is a stone in kg?
One stone is 14 pounds, about 6.35 kilograms — still common for body weight in the UK.
How many grams are in a kilogram?
1,000 g, and a metric tonne is 1,000 kg.
How many pounds are in a kilogram?
About 2.205 lb, since 1 pound is 0.4536 kg.
How many ounces are in a pound?
16 ounces. One ounce is about 28.35 g.