Pounds to Kilograms Calculator
Convert a weight in pounds (lb) to kilograms (kg). Enter pounds to see the equivalent weight in kilograms.
How It Works
Kilograms = Pounds × 0.45359237
One pound is defined as exactly 0.45359237 kilograms (international avoirdupois pound). Multiply pounds by this factor for the exact conversion.
Worked Examples
Example 1. 150 lb × 0.45359237 ≈ 68.04 kg.
Example 2. 2.5 lb × 0.45359237 ≈ 1.13 kg.
When to Use This Calculator
Use when filling out international medical or travel forms that require weight in kg, shipping parcels internationally, or following metric fitness guidelines.
Frequently Asked Questions
How many kg is 1 pound?
Exactly 0.45359237 kg, often rounded to 0.454 kg.
Quick mental estimate?
Divide pounds by 2.2 for a rough kg value. For example, 150 lb ÷ 2.2 ≈ 68 kg.
What is the reverse?
Use the Kilograms to Pounds Calculator.
Educational estimate only. Results are for planning and comparison purposes. They are not financial, tax, or professional advice. Verify important figures with a qualified professional before making financial decisions. See our Financial Disclaimer.