Pound to Gram (lb to g)
Result
453.59237 Gram
Formula
g = lb × 453.59237
1 lb = 453.59237 g, and 1 g = 0.002204622622 lb.
The kilogram is the SI base unit of mass, defined through the Planck constant since 2019. The international avoirdupois pound is exactly 0.45359237 kg; the ounce is 1/16 lb and the stone 14 lb.
Worked examples
- 1 lb × 453.59237 = 453.59237 g
- 10 lb × 453.59237 = 4,535.9237 g
- 100 lb × 453.59237 = 45,359.237 g
Common mistakes
- Precious metals use the troy ounce (31.1034768 g), about 10% heavier than the avoirdupois ounce (28.349523125 g) used for food and parcels.
- "Ton" is ambiguous: the metric tonne used here is 1,000 kg, the US short ton 907.18474 kg and the UK long ton 1,016.0469088 kg.
- Kilograms and pounds measure mass. Pound-force (lbf) and newtons measure force — they are not interchangeable with kg.
Pound to Gram table
| Pound (lb) | Gram (g) |
|---|---|
| 1 | 453.59237 |
| 2 | 907.18474 |
| 5 | 2,267.9619 |
| 10 | 4,535.9237 |
| 20 | 9,071.8474 |
| 50 | 22,679.619 |
| 100 | 45,359.237 |
| 1,000 | 453,592.37 |
The units
- Pound (lb)
- The international avoirdupois pound, exactly 0.45359237 kg.
- Gram (g)
- One thousandth of a kilogram.
Sources for these factors
- The International System of Units (SI Brochure), 9th edition — BIPM
- Handbook 44 (2024), Appendix C: General Tables of Units of Measurement — NIST
- Guide for the Use of the International System of Units (SP 811), Appendix B: conversion factors — NIST
Last reviewed against these sources. An automated check recomputes every factor from its definition on each build. How we check accuracy