Convert Grains to Pounds
1 grain (gr) equals 0.0001428571429 pounds (lb).
1 gr = 0.0001428571429 lb
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk grain to pound converter to paste a column from Excel.
How to Convert Grain to Pound
- 1 gr = 0.0001428571429 lb
- 1 lb = 7000 gr
- Example: convert 15 gr to lb: 15 gr = 15 × 0.0001428571429 lb = 0.002142857143 lb
Reference conditions. gr: Avoirdupois system: 1 lb = 16 oz = 7000 grains = 0.45359237 kg exactly (1959 agreement). lb: Avoirdupois system: 1 lb = 16 oz = 7000 grains = 0.45359237 kg exactly (1959 agreement).
Formula
lb = gr ÷ 7000
Derivation from SI units:
- 1 gr = 1/7000 lb = 64.79891 mg (exact)
- 1 lb = 0.45359237 kg (exact, 1959 international agreement)
- 1 gr = 0.00006479891 kg ÷ 0.45359237 kg per lb = 0.0001428571428571 lb
Both units are defined exactly, so the factor is exact. Grain definition: grain; Pound definition: pound.
Worked examples
- A reading of 40 gr converts to 0.005714285714 lb.
40 gr × 0.0001428571429 = 0.005714285714 lb - A value of 150 gr is 0.02142857143 lb.
150 gr × 0.0001428571429 = 0.02142857143 lb
Grain to Pound conversion table
| Grains (gr) | Pounds (lb) |
|---|---|
| 1 gr | 0.0001428571429 lb |
| 5 gr | 0.0007142857143 lb |
| 10 gr | 0.001428571429 lb |
| 15 gr | 0.002142857143 lb |
| 20 gr | 0.002857142857 lb |
| 40 gr | 0.005714285714 lb |
| 55 gr | 0.007857142857 lb |
| 100 gr | 0.01428571429 lb |
| 115 gr | 0.01642857143 lb |
| 124 gr | 0.01771428571 lb |
| 150 gr | 0.02142857143 lb |
| 180 gr | 0.02571428571 lb |
| 300 gr | 0.04285714286 lb |
| 1000 gr | 0.1428571429 lb |
| 7000 gr | 1 lb |
Where it's used
Grains are used for bullet and powder weights, while pounds appear in body weight and food in the US. Both measure mass (commonly called weight), so the conversion is a fixed factor.
Grain to other weight and mass units
| Conversion | 1 gr equals |
|---|---|
| grain to kilogram | 0.00006479891 kg |
| grain to gram | 0.06479891 g |
| grain to milligram | 64.79891 mg |
| grain to microgram | 64798.91 µg |
| grain to metric ton | 6.479891 × 10⁻⁸ t |
| grain to pound | 0.0001428571429 lb |
| grain to ounce | 0.002285714286 oz |
| grain to stone | 0.00001020408163 st |
| grain to short ton | 7.142857143 × 10⁻⁸ ton (US) |
| grain to long ton | 6.37755102 × 10⁻⁸ ton (UK) |
| grain to troy ounce | 0.002083333333 oz t |
| grain to carat | 0.32399455 ct |
Frequently asked questions
How many pounds are in 1 grain?
1 gr = 0.0001428571429 lb.
How do I convert grains to pounds?
Multiply the value in gr by 0.0001428571429, or divide it by 7000. For example, 15 gr × 0.0001428571429 = 0.002142857143 lb.
Is the gr to lb conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "grain (gr)".
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "pound (avoirdupois) (lb)".
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Grains to Pounds. Retrieved October 17, 2026, from https://scientificconverters.com/mass/grains-to-pounds/
IEEE
Scientific Converters, "Convert Grains to Pounds," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/mass/grains-to-pounds/