How do I convert pounds to kilograms or ounces to grams?
Weight converter: kilograms, grams, milligrams, tons, and US/UK pounds, ounces, stones. Type a value in one unit, see the conversion to every other.
Useful for diet, fitness, cooking, international shipping, and US health apps.
How to use it
- Type a value and pick a unit from the dropdown.
- Every other weight unit shows the conversion automatically.
- Click any result to copy to clipboard.
When this is useful
The most common uses:
- Body weight in pounds to kilograms. "180 lb is how many kg?" (81.6 kg). Classic question when using non-US health apps.
- Cooking recipes in ounces. "8 oz of flour is how many grams?" (227 g). US and UK recipes often use ounces.
- Shipping a package abroad. Couriers and post offices ask for weight in a specific unit. Quick conversion.
- Sport and gym. "What's 225 lb (the classic bench press weight) in kg?" (102 kg). Convert dumbbells, barbells, plates.
- Tons and kilograms. "1 ton is how many kg?" (1000). "12-ton truck is how much?" (12,000 kg). Simple but easy to confuse.
- Education and schoolwork. Kids converting units in school. Check the answer here.
Questions and answers
1 pound (lb) = 0.453 kg. Or the other way around: 1 kg = 2.205 pounds. Mental shortcut: 100 lb is roughly 45 kg, 200 lb is around 90 kg.