Convert Pounds to Grains
1 pound (lb) equals 7000 grains (gr).
1 lb = 7000 gr
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk pound to grain converter to paste a column from Excel.
How to Convert Pound to Grain
- 1 lb = 7000 gr
- 1 gr = 0.0001428571429 lb
- Example: convert 15 lb to gr: 15 lb = 15 × 7000 gr = 105000 gr
Reference conditions. lb: Avoirdupois system: 1 lb = 16 oz = 7000 grains = 0.45359237 kg exactly (1959 agreement). gr: Avoirdupois system: 1 lb = 16 oz = 7000 grains = 0.45359237 kg exactly (1959 agreement).
Formula
gr = lb × 7000
Derivation from SI units:
- 1 lb = 0.45359237 kg (exact, 1959 international agreement)
- 1 gr = 1/7000 lb = 64.79891 mg (exact)
- 1 lb = 0.45359237 kg ÷ 0.00006479891 kg per gr = 7000 gr
Both units are defined exactly, so the factor is exact. Pound definition: pound; Grain definition: grain.
Worked examples
- A reading of 20 lb converts to 140000 gr.
20 lb × 7000 = 140000 gr - A value of 140 lb is 980000 gr.
140 lb × 7000 = 980000 gr
Pound to Grain conversion table
| Pounds (lb) | Grains (gr) |
|---|---|
| 0.25 lb | 1750 gr |
| 0.5 lb | 3500 gr |
| 1 lb | 7000 gr |
| 2 lb | 14000 gr |
| 3 lb | 21000 gr |
| 5 lb | 35000 gr |
| 10 lb | 70000 gr |
| 15 lb | 105000 gr |
| 20 lb | 140000 gr |
| 25 lb | 175000 gr |
| 30 lb | 210000 gr |
| 40 lb | 280000 gr |
| 50 lb | 350000 gr |
| 100 lb | 700000 gr |
| 120 lb | 840000 gr |
| 130 lb | 910000 gr |
| 140 lb | 980000 gr |
| 150 lb | 1050000 gr |
| 160 lb | 1120000 gr |
| 170 lb | 1190000 gr |
| 180 lb | 1260000 gr |
| 200 lb | 1400000 gr |
| 220 lb | 1540000 gr |
| 250 lb | 1750000 gr |
| 300 lb | 2100000 gr |
Where it's used
Pounds are used for body weight and food in the US, while grains appear in bullet and powder weights. Both measure mass (commonly called weight), so the conversion is a fixed factor.
Pound to other weight and mass units
| Conversion | 1 lb equals |
|---|---|
| pound to kilogram | 0.45359237 kg |
| pound to gram | 453.59237 g |
| pound to milligram | 453592.37 mg |
| pound to microgram | 453592370 µg |
| pound to metric ton | 0.00045359237 t |
| pound to ounce | 16 oz |
| pound to stone | 0.07142857143 st |
| pound to short ton | 0.0005 ton (US) |
| pound to long ton | 0.0004464285714 ton (UK) |
| pound to grain | 7000 gr |
| pound to troy ounce | 14.58333333 oz t |
| pound to carat | 2267.96185 ct |
Frequently asked questions
How many grains are in 1 pound?
1 lb = 7000 gr.
How do I convert pounds to grains?
Multiply the value in lb by 7000. For example, 15 lb × 7000 = 105000 gr.
Is the lb to gr conversion exact?
Yes. Both units are defined exactly, and 1 lb is exactly 7000 gr.
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, "pound (avoirdupois) (lb)".
- 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)".
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 Pounds to Grains. Retrieved October 17, 2026, from https://scientificconverters.com/mass/pounds-to-grains/
IEEE
Scientific Converters, "Convert Pounds to Grains," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/mass/pounds-to-grains/