Convert Pounds to Grams
Pounds to grams is the conversion for turning an imperial weight into precise metric grams — exactly what you need when a recipe or a spec is written in pounds but your scale speaks metric. One pound is exactly 453.59237 grams, so the number always gets much bigger when you make the switch.
Pounds to Grams conversion table
| Pounds (lb) | Grams (g) |
|---|---|
| 1 | 453.59237 |
| 2 | 907.18474 |
| 3 | 1,360.77711 |
| 5 | 2,267.96185 |
| 10 | 4,535.9237 |
| 20 | 9,071.8474 |
| 50 | 22,679.6185 |
| 100 | 45,359.237 |
| 500 | 226,796.185 |
| 1,000 | 453,592.37 |
The formula
To convert pounds to grams, multiply the weight in pounds by 453.59237:
grams = pounds × 453.59237
A worked example
A bag of rice is sold as 5 lb and you want its weight in grams:
5 × 453.59237 = 2268 g
So a five-pound bag is just under two and a third kilograms — handy to know when you're comparing it against a metric-priced equivalent.
Why it's exact
Since 1959 the international avoirdupois pound has been defined as exactly 453.59237 grams. That exactness is why the conversion holds up under scrutiny: whether you're scaling a recipe or checking a shipment, the gram figure you get is the real weight, not a near-enough estimate.
When you'll use it
Following an American recipe on a metric scale, converting a product sold by the pound into grams for nutrition math, weighing ingredients precisely, or lining up a pounds-quoted weight against grams-based packaging.
Frequently asked questions
How many grams are in a pound?
Exactly 453.59237 grams. Because the international pound is officially defined by that gram figure, multiplying pounds by it is precise rather than rounded.
Why is the factor such an odd, long number?
Because the pound wasn't designed around the metric system — the two were later tied together by agreement, and 453.59237 g is the exact value that agreement fixed. The messiness is just history, not error.
Is this the pound for food and body weight?
Yes, this is the avoirdupois pound used for groceries, parcels, and people. Precious metals are weighed in troy units, which don't use this factor.