Density and Mass
dwttolb
Convert pennyweights (troy) (dwt) to pounds (avoirdupois) (lb).
Factor1 dwt = 0.003428571 lb
Converter
dwt
Accepts numbers or expressions, e.g. 150 + 14.7
Result
lb
Rendered to 6 significant figures.
Formula
Formula
lb = dwt × 0.003428571
Multiply any value in pennyweights (troy) by 0.003428571 to obtain the value in pounds (avoirdupois).
Worked example
Convert 300 dwt to lb.
- 01Start with 300 dwt.
- 02Multiply by the conversion factor: 300 × 0.003428571 = 1.02857 lb.
Result300 dwt = 1.02857 lb
Conversion table
| dwt | lb |
|---|---|
| 1 | 0.0034286 |
| 2 | 0.0068571 |
| 5 | 0.017143 |
| 10 | 0.034286 |
| 20 | 0.068571 |
| 50 | 0.17143 |
| 100 | 0.34286 |
| 200 | 0.68571 |
| 500 | 1.7143 |
| 1000 | 3.4286 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from dwt to lb?
1 dwt equals 0.003428571 lb. To convert, multiply the value in pennyweights (troy) by 0.003428571.
How do I convert 1 dwt to lb?
1 dwt = 0.00342857 lb. For any value, multiply by 0.003428571.
How do I convert lb back to dwt?
Divide by the same factor — or equivalently, multiply by 291.6667. So 1 lb = 291.667 dwt.
When would I need to convert pennyweight (troy) to pound (avoirdupois)?
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).