Density and Mass
lbtogr
Convert pounds (avoirdupois) (lb) to grains (gr).
Factor1 lb = 7000 gr
Converter
lb
Accepts numbers or expressions, e.g. 150 + 14.7
Result
gr
Rendered to 6 significant figures.
Formula
Formula
gr = lb × 7000
Multiply any value in pounds (avoirdupois) by 7000 to obtain the value in grains.
Worked example
Convert 1 lb to gr.
- 01Start with 1 lb.
- 02Multiply by the conversion factor: 1 × 7000 = 7000 gr.
Result1 lb = 7000 gr
Conversion table
| lb | gr |
|---|---|
| 1 | 7000 |
| 2 | 14000 |
| 5 | 35000 |
| 10 | 70000 |
| 20 | 1.4000e+5 |
| 50 | 3.5000e+5 |
| 100 | 7.0000e+5 |
| 200 | 1.4000e+6 |
| 500 | 3.5000e+6 |
| 1000 | 7.0000e+6 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from lb to gr?
1 lb equals 7000 gr. To convert, multiply the value in pounds (avoirdupois) by 7000.
How do I convert 1 lb to gr?
1 lb = 7000 gr. For any value, multiply by 7000.
How do I convert gr back to lb?
Divide by the same factor — or equivalently, multiply by 0.0001428571. So 1 gr = 0.000142857 lb.
When would I need to convert pound (avoirdupois) to grain (troy/apothecary)?
Mass conversions appear in material balances, reagent dosing, and reconciling vendor specifications across imperial/metric systems.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).