Density and Mass
oztodr
Convert ounces (avoirdupois) (oz) to drams (avoirdupois) (dr).
Factor1 oz = 16 dr
Converter
oz
Accepts numbers or expressions, e.g. 150 + 14.7
Result
dr
Rendered to 6 significant figures.
Formula
Formula
dr = oz × 16
Multiply any value in ounces (avoirdupois) by 16 to obtain the value in drams (avoirdupois).
Worked example
Convert 1 oz to dr.
- 01Start with 1 oz.
- 02Multiply by the conversion factor: 1 × 16 = 16 dr.
Result1 oz = 16 dr
Conversion table
| oz | dr |
|---|---|
| 1 | 16 |
| 2 | 32 |
| 5 | 80 |
| 10 | 160 |
| 20 | 320 |
| 50 | 800 |
| 100 | 1600 |
| 200 | 3200 |
| 500 | 8000 |
| 1000 | 16000 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from oz to dr?
1 oz equals 16 dr. To convert, multiply the value in ounces (avoirdupois) by 16.
How do I convert 1 oz to dr?
1 oz = 16 dr. For any value, multiply by 16.
How do I convert dr back to oz?
Divide by the same factor — or equivalently, multiply by 0.0625. So 1 dr = 0.0625 oz.
When would I need to convert ounce (avoirdupois) 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).