Unit converter
Pounds to Grams Converter
Convert pounds to grams with the exact factor 453.59237. One avoirdupois pound is exactly 453.59237 g, so this page is suited to US recipe quantities, imported food packaging, dumbbells and gym plates, baby weights, luggage allowances, parcel limits, and product listings that give pounds while a UK scale or metric form asks for grams. It is a mass conversion, not a force calculation, and it follows the international yard-and-pound agreement used for everyday pound and ounce weights.
1 pound = 453.59 grams
Common pounds to grams values
| Pounds | Grams |
|---|---|
| 1 lb | 453.59 g |
| 2 lb | 907.18 g |
| 5 lb | 2,267.96 g |
| 10 lb | 4,535.92 g |
| 20 lb | 9,071.85 g |
| 50 lb | 22,679.62 g |
| 100 lb | 45,359.24 g |
How to convert
- Start with the weight in pounds, using the ordinary avoirdupois pound.
- Multiply by the exact factor 453.59237, because one pound is exactly 453.59237 grams.
- Read the answer as grams, the metric unit used on most UK food labels and small scales.
- To go from grams back to pounds, divide by 453.59237.
- For a quick estimate, use 454 g per pound: 2 lb is just under 908 g and 2.2 lb is just under 1 kg.
grams = pounds * 453.59237
The pound entry in the mass table is 453.59237 grams. Multiplying a pound value by 453.59237 gives the same mass in grams. Dividing grams by that factor reverses the conversion.
- lb
- the weight in avoirdupois pounds you start with
- 453.59237
- grams in one avoirdupois pound, by definition
Worked example
A 2.5 lb bag of bread flour is 2.5 multiplied by 453.59237, which equals 1133.980925 g. A recipe card could show that as 1134 g, while a shop listing might round it to 1.134 kg.
Key facts
- One pound is exactly 453.59237 g.
- Half a pound is 226.796185 g.
- A 2.2 lb item is 997.903214 g, close to 1 kg but not exactly 1 kg.
- A 5 lb gym plate is 2267.96185 g.
Tips
- For food and recipe work, round the final gram value to the nearest gram unless the ingredient is very sensitive.
- For luggage and parcels, leave headroom below the stated limit because check-in and depot scales may display fewer decimals.
- When converting a mixed pounds-and-ounces value, convert the ounces to pounds first or convert each part to grams and add the results.
Frequently asked questions
How many grams is 1 lb?+
One avoirdupois pound is exactly 453.59237 grams.
How many pounds is 1 gram?+
One gram is 1 / 453.59237 lb, about 0.002204622621848776 lb.
Is this right for gym plates?+
Yes. A plate marked in pounds can be converted to grams by multiplying by 453.59237, then to kilograms by dividing the gram result by 1000.
Does this apply to body weight?+
Yes. Body weight in pounds uses the same avoirdupois pound, so the gram result is mathematically the same mass expressed in metric form.
Things to watch
- Using 454 g for every pound is a handy estimate, but it is not the exact factor used by this calculator.
- US and imperial avoirdupois pounds share the same mass here; troy pounds and fluid ounces belong to different measurement systems.
Sources
- NIST Handbook 44, Appendix C: General Tables of Units of Measurement · NIST
- International yard and pound agreement (1959) · NIST
- Weights and Measures Act 1985 · UK legislation.gov.uk
Last updated: 2026-01-01
Conversions use internationally defined factors. Provided for general use; verify critical measurements independently.