Pounds to Kilograms Converter
Convert pounds to kilograms instantly. Quick, accurate weight conversion calculator.
How to Convert Pounds to Kilograms
To convert pounds (lbs) to kilograms (kg), multiply the weight in pounds by 0.453592. Alternatively, divide by 2.20462.
For example, 150 lbs × 0.453592 = 68.04 kg. A quick mental shortcut: divide pounds by 2.2 for an approximate result.
The pound is used primarily in the United States, while kilograms are the standard unit of mass in the metric system used worldwide.
Common Pounds to Kg Conversions
- 100 lbs = 45.36 kg
- 120 lbs = 54.43 kg
- 150 lbs = 68.04 kg
- 180 lbs = 81.65 kg
- 200 lbs = 90.72 kg
These conversions are commonly needed for gym weights, body weight tracking, luggage limits, and medical records.
Pounds vs Kilograms
The pound (lb) and kilogram (kg) are both units of mass. The kilogram is the SI base unit of mass, defined by the International Bureau of Weights and Measures.
One kilogram equals approximately 2.205 pounds. Knowing this relationship helps when traveling internationally, following fitness programs, or reading nutrition labels from different countries.
Frequently Asked Questions
How many kg is 1 pound?
1 pound equals approximately 0.4536 kilograms.
What's a quick way to convert lbs to kg?
Divide the number of pounds by 2.2. For example, 180 lbs ÷ 2.2 ≈ 81.8 kg.
Why do some countries use pounds and others kilograms?
The United States uses the imperial system (pounds), while most other countries adopted the metric system (kilograms). The UK uses a mix of both.