Density and Mass
lbtodwt
Convert pounds (avoirdupois) (lb) to pennyweights (troy) (dwt).
Factor1 lb = 291.6667 dwt
Converter
lb
Accepts numbers or expressions, e.g. 150 + 14.7
Result
dwt
Rendered to 6 significant figures.
Formula
Formula
dwt = lb × 291.6667
Multiply any value in pounds (avoirdupois) by 291.6667 to obtain the value in pennyweights (troy).
Worked example
Convert 1 lb to dwt.
- 01Start with 1 lb.
- 02Multiply by the conversion factor: 1 × 291.6667 = 291.667 dwt.
Result1 lb = 291.667 dwt
Conversion table
| lb | dwt |
|---|---|
| 1 | 291.67 |
| 2 | 583.33 |
| 5 | 1458.3 |
| 10 | 2916.7 |
| 20 | 5833.3 |
| 50 | 14583 |
| 100 | 29167 |
| 200 | 58333 |
| 500 | 1.4583e+5 |
| 1000 | 2.9167e+5 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from lb to dwt?
1 lb equals 291.6667 dwt. To convert, multiply the value in pounds (avoirdupois) by 291.6667.
How do I convert 1 lb to dwt?
1 lb = 291.667 dwt. For any value, multiply by 291.6667.
How do I convert dwt back to lb?
Divide by the same factor — or equivalently, multiply by 0.003428571. So 1 dwt = 0.00342857 lb.
When would I need to convert pound (avoirdupois) to pennyweight (troy)?
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).