Kilograms to Pounds Converter (kg to lb)

The pound is defined from the kilogram: under the 1959 international yard and pound agreement, 1 lb is exactly 0.45359237 kg. That fixes 1 kg at 2.20462262185 lb, the factor this converter uses in both directions, for body weight, luggage allowances, gym plates or shipping weights.

Results can also be read in pounds and ounces (16 oz to the pound), the way US and UK scales often show a baby's or a parcel's weight.

How to use this tool

1. Type a value in the Kilogram box to see it in pounds, or type in the Pound box to convert the other way.
2. Press ⇄ to swap the two units, or Load example for a typical value.
3. Check the charts below for common values; for other units, open the Weight & Mass converter.

Formula

lb = kg ÷ 0.45359237 (≈ 2.20462)

kg = lb × 0.45359237

Both factors come from exact definitions: 1 pound = 0.45359237 kilograms and 1 kilogram = 2.20462262185 pounds (shown to 12 significant digits).

Example

Two conversions worked with the same factors the converter uses:

70 kg × 2.20462262185 ≈ 154.324 lb

150 lb × 0.45359237 ≈ 68.0389 kg

Kilogram to Pound chart

Common values from kilograms to pounds, rounded to four decimal places.

Pound to Kilogram chart

The reverse direction for values people often look up.

Quick mental estimate

Double the kilograms, then add a tenth of that: 70 kg → 140 + 14 = 154 lb. The shortcut multiplies by 2.2, which runs about 0.2% below the exact factor.

Use the converter or the charts when the exact figure matters.

The two units

Kilogram (kg): The kilogram is the SI base unit of mass. Since 2019 it has been defined by fixing the value of the Planck constant, replacing the platinum-iridium prototype kept near Paris.

Pound (lb): The avoirdupois pound has been defined since 1959 as exactly 0.45359237 kilograms and is divided into 16 ounces. It is the everyday unit of weight in the US.