Conversion result
40 lb = 18.1437 kg
How the conversion works
Converting from pounds to kilograms uses this relationship:
kg = lb × 0.453592
Plugging in 40 lb gives 18.1437 kg. Adjust the value in the calculator above if you need a different amount.
When people convert pounds
This weight conversion shows up in recipes, fitness tracking, travel, shopping, and school homework. Bookmark nearby values from the related list, or open the full unit converter for more unit pairs.