Pounds to Grams Converter: Quick and Simple Results

The exact factor

One avoirdupois pound equals exactly 453.59237 grams. Like the inch-to-mm ratio, this isn't rounded — it's the precise value fixed by the 1959 International Yard and Pound Agreement, so multiplying by 453.59237 introduces no conversion error of its own.

Worked example

A 1-pound bag of flour: 1 × 453.59237 = 453.59237, which the tool rounds and displays as 453.59 grams. A 5-pound weight: 5 × 453.59237 = 2267.96185, shown as 2267.96 grams.

In context

453.59 grams is also roughly 16 avoirdupois ounces (1 oz = 28.3495 g), since a pound is defined as 16 ounces in that system. If your starting number is already in ounces rather than pounds, convert to pounds first (divide by 16) or use an ounces-to-grams tool directly — plugging an ounce figure into this pound converter will overstate the result by 16×.

Rounding

The result is rounded to two decimal places, sufficient for cooking, shipping weight estimates, and most everyday uses. For lab or pharmaceutical work requiring more precision, use the full 453.59237 factor directly rather than the rounded on-screen result.