Density and Mass
oz ttodr
Convert troy ounces (oz t) to drams (avoirdupois) (dr).
Factor1 oz t = 17.55429 dr
Converter
oz t
Accepts numbers or expressions, e.g. 150 + 14.7
Result
dr
Rendered to 6 significant figures.
Formula
Formula
dr = oz t × 17.55429
Multiply any value in troy ounces by 17.55429 to obtain the value in drams (avoirdupois).
Worked example
Convert 1 oz t to dr.
- 01Start with 1 oz t.
- 02Multiply by the conversion factor: 1 × 17.55429 = 17.5543 dr.
Result1 oz t = 17.5543 dr
Conversion table
| oz t | dr |
|---|---|
| 1 | 17.554 |
| 2 | 35.109 |
| 5 | 87.771 |
| 10 | 175.54 |
| 20 | 351.09 |
| 50 | 877.71 |
| 100 | 1755.4 |
| 200 | 3510.9 |
| 500 | 8777.1 |
| 1000 | 17554 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from oz t to dr?
1 oz t equals 17.55429 dr. To convert, multiply the value in troy ounces by 17.55429.
How do I convert 1 oz t to dr?
1 oz t = 17.5543 dr. For any value, multiply by 17.55429.
How do I convert dr back to oz t?
Divide by the same factor — or equivalently, multiply by 0.05696615. So 1 dr = 0.0569661 oz t.
When would I need to convert troy ounce to dram (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).