Converting pounds to kilograms is essential for international communication, especially when dealing with health records, fitness tracking, and scientific measurements. This conversion helps bridge the gap between imperial and metric weight systems.

Conversion Formula

To convert pounds to kilograms, divide the pound value by 2.20462:

kilograms = pounds ÷ 2.20462

Common Conversions

Pounds	Kilograms
1 lbs	0.45 kg
10 lbs	4.54 kg
25 lbs	11.34 kg
50 lbs	22.68 kg
100 lbs	45.36 kg
150 lbs	68.04 kg
200 lbs	90.72 kg
250 lbs	113.40 kg

Practical Examples

Body Weight: 180 lbs person weighs 81.6 kg
Weightlifting: 225 lbs barbell weighs 102.1 kg
Pet Weight: 15 lbs cat weighs 6.8 kg
Package Weight: 50 lbs package weighs 22.7 kg

When to Use This Conversion

Medical records and healthcare documentation
International sports and fitness tracking
Scientific research and laboratory work
International shipping and logistics
Recipe conversions for international cooking
Travel and immigration documentation

Accuracy and Precision

The conversion uses the exact international definition where 1 pound equals 0.45359237 kilograms. This ensures maximum accuracy for all applications, from everyday use to scientific and medical purposes.

Frequently Asked Questions

How many kilograms are in a pound?

There are approximately 0.454 kilograms in one pound.

How do you convert 165 lbs to kg?

Divide 165 by 2.20462: 165 ÷ 2.20462 = 74.84 kg.

Which is smaller, kg or lbs?

Pounds are smaller. It takes about 2.2 pounds to equal one kilogram.

Why convert pounds to kilograms?

Kilograms are the international standard for weight measurement, used in science, medicine, and most countries worldwide.