A weight converter converts a mass measurement from one unit to another. This converter supports metric units (mg, g, kg, tonnes) and imperial/US units (ounces, pounds, stone, short tons, long tons). All conversions use internationally recognised reference values.

1. Enter the value to convert.
2. Select the unit you are converting from.
3. Select the unit you are converting to.
4. Click Convert.

70 kg to pounds: 70 ÷ 0.453592 = 154.32 lb
11 stone to kg: 11 × 6.35029 = 69.85 kg

Weight and mass are technically different (weight is a force; mass is the amount of matter), but in everyday use they are treated as equivalent. The metric system uses kilograms as the base unit. The imperial system uses pounds and ounces. Stone is used primarily in the UK and Ireland for body weight.

• Confusing metric tonnes (1,000 kg) with US short tons (907 kg) or imperial long tons (1,016 kg).
• Confusing fluid ounces (volume) with ounces (mass) — this converter uses mass ounces only.

How many pounds are in a kilogram?

1 kilogram = 2.20462 pounds.

What is a stone in kilograms?

1 stone = 14 pounds = 6.35029 kilograms.