The pound (US/UK customary) and the gram (metric) both have exact definitions, making this a precise weight conversion.
How it works
Multiplying pounds by 453.59237 gives grams; dividing grams by that same constant gives pounds back. Type into either field and the other updates instantly.
What this does not include
This does not include kilograms — for the pound-to-kilogram direction specifically, use this site’s dedicated lbs-to-kg converter instead.
How to use this calculator
- Enter a value in either pounds or grams — the other field fills in automatically.
Frequently asked questions
Why is 1 pound exactly 453.59237 grams?
It’s the exact international definition set by a 1959 agreement standardizing the avoirdupois pound.
Where is this conversion most commonly needed?
Cooking and shipping weights, where recipes or postal forms sometimes use grams and sometimes pounds.
Is this different from converting pounds to kilograms?
Yes — grams and kilograms are both metric, but this goes directly to grams (1/1000 of a kilogram) rather than kilograms, useful for smaller quantities.
