LBS to KG Converter

Type a number of pounds and this converter shows the answer in kilograms instantly (1 lb = 0.453592 kg). Below the converter you will find a ready-made lb to kg table, and further down the formula with a worked example.

Pounds are the everyday weight unit in the United States, and are still common in the UK for body weight and in gyms worldwide. Converting to kilograms is needed for medical forms and drug doses calculated per kilogram, international shipping, luggage limits, recipes and for entering your weight into metric BMI or calorie calculators.

How to use the LBS to KG tool

1. Enter the value in pounds in the Value box. Decimals such as 75.5 are fine.
2. The result in kilograms appears straight away, rounded to six significant digits.
3. Check the formula line under the result to see exactly how it was calculated.
4. Press ⇄ to convert kilograms back to pounds, or pick any other unit from the lists.
5. Use Copy result, or look up common values in the conversion table.

Why use ToolOrca LBS to KG

• Exact factor: 1 lb = 0.453592 kg
• Conversion table: lb to kg
• Formula and worked example included
• Instant result as you type
• Converts to every other weight unit too
• Free, private and works offline

How to convert pounds to kilograms

Since 1959 the international avoirdupois pound is defined as exactly 0.45359237 kilograms. The kilogram is the SI base unit of mass, defined since 2019 through the Planck constant. So 1 lb = 0.45359237 kg exactly, and 1 kg = 2.20462262 lb.

To convert pounds to kilograms, multiply the number of pounds by 0.45359237.

Worked example: 150 lb × 0.45359237 = 68.0389 kg.

Quick mental math for lb to kg

Halve the pounds and take away 10% of the half: 150 lb → 75, minus 7.5 = 67.5 kg. The exact result is 68.04 kg, so the shortcut is close enough for a quick estimate.

Need the opposite direction? Use the kilograms to pounds converter, or switch units with the ⇄ button above.