Pounds to Kilograms Converter
The weight conversion you use most often.
Pounds to Kilograms Converter
Convert between any two weight & mass units instantly.
Gram (g)
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What This Calculator Does
The Pounds to Kilograms Converter translates imperial weight into metric kilograms using the exact international standard factor. Most gym equipment, medical scales, and nutrition labels outside the US use kilograms, so this conversion comes up constantly when you track body weight, measure ingredients, or compare product specifications across countries.
How It Works
One pound equals exactly 0.453592 kilograms. Multiply any weight in pounds by this number to get the kilogram equivalent.
Example
A 180-pound person weighs 81.65 kg. A 50-pound bag of flour is 22.68 kg. A newborn at 7 pounds 8 ounces is 3.40 kg.
Formula
kg = lbs x 0.4535921 lb = 0.453592 kg exactly.
Reading the Results
Weight in Kilograms
Your weight expressed in kilograms using the exact international conversion factor.
Frequently Asked Questions
How many kilograms is 1 pound?
One pound equals 0.453592 kilograms. For quick estimates, multiply pounds by 0.45.
How do I convert kilograms back to pounds?
Multiply kilograms by 2.20462. A 70 kg person weighs about 154 pounds.
Why do different countries use different units?
The US, Liberia, and Myanmar use pounds. Most of the world uses kilograms.
Is 1 pound the same as 1 kilogram?
No. One kilogram is about 2.2 pounds, so kilograms are the larger unit.