Convert between metric and imperial mass and weight units. Enter a value and pick the units.
Usage Tip
Anchors: 1 kg ≈ 2.2 lb, 1 lb ≈ 454 g, 1 oz ≈ 28.35 g.
result = value × (from factor ÷ to factor)
This treats weight as mass, which is correct on Earth at everyday precision.
1 pound = 16 ounces; 1 stone = 14 pounds (used in the UK for body weight).
A metric ton is 1000 kg ≈ 2205 lb, close to but not the same as a US short ton (2000 lb).
Strictly speaking, kilograms and pounds are units of mass, while weight is the force of gravity acting on that mass, but everyday use treats them as interchangeable on Earth. One kilogram is about 2.2046 pounds, and one pound is exactly 0.45359237 kilograms. One ounce is about 28.35 grams.
For cooking, shipping, and body weight, the conversion above is all you need. For precise engineering work, the difference between mass and force matters, as does the difference between ounces of weight and fluid ounces of volume. When converting a small quantity, keep enough decimals to avoid visible rounding, and round only the final result.