Density and Mass
dwttomg
Convert pennyweights (troy) (dwt) to milligrams (mg).
Factor1 dwt = 1555.174 mg
Converter
dwt
Accepts numbers or expressions, e.g. 150 + 14.7
Result
mg
Rendered to 6 significant figures.
Formula
Formula
mg = dwt × 1555.174
Multiply any value in pennyweights (troy) by 1555.174 to obtain the value in milligrams.
Worked example
Convert 1 dwt to mg.
- 01Start with 1 dwt.
- 02Multiply by the conversion factor: 1 × 1555.174 = 1555.17 mg.
Result1 dwt = 1555.17 mg
Conversion table
| dwt | mg |
|---|---|
| 1 | 1555.2 |
| 2 | 3110.3 |
| 5 | 7775.9 |
| 10 | 15552 |
| 20 | 31103 |
| 50 | 77759 |
| 100 | 1.5552e+5 |
| 200 | 3.1103e+5 |
| 500 | 7.7759e+5 |
| 1000 | 1.5552e+6 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from dwt to mg?
1 dwt equals 1555.174 mg. To convert, multiply the value in pennyweights (troy) by 1555.174.
How do I convert 1 dwt to mg?
1 dwt = 1555.17 mg. For any value, multiply by 1555.174.
How do I convert mg back to dwt?
Divide by the same factor — or equivalently, multiply by 0.0006430149. So 1 mg = 0.000643015 dwt.
When would I need to convert pennyweight (troy) to milligram?
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).