Density and Mass
grtodr
Convert grains (gr) to drams (avoirdupois) (dr).
Factor1 gr = 0.03657143 dr
Converter
gr
Accepts numbers or expressions, e.g. 150 + 14.7
Result
dr
Rendered to 6 significant figures.
Formula
Formula
dr = gr × 0.03657143
Multiply any value in grains by 0.03657143 to obtain the value in drams (avoirdupois).
Worked example
Convert 100 gr to dr.
- 01Start with 100 gr.
- 02Multiply by the conversion factor: 100 × 0.03657143 = 3.65714 dr.
Result100 gr = 3.65714 dr
Conversion table
| gr | dr |
|---|---|
| 1 | 0.036571 |
| 2 | 0.073143 |
| 5 | 0.18286 |
| 10 | 0.36571 |
| 20 | 0.73143 |
| 50 | 1.8286 |
| 100 | 3.6571 |
| 200 | 7.3143 |
| 500 | 18.286 |
| 1000 | 36.571 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from gr to dr?
1 gr equals 0.03657143 dr. To convert, multiply the value in grains by 0.03657143.
How do I convert 1 gr to dr?
1 gr = 0.0365714 dr. For any value, multiply by 0.03657143.
How do I convert dr back to gr?
Divide by the same factor — or equivalently, multiply by 27.34375. So 1 dr = 27.3438 gr.
When would I need to convert grain (troy/apothecary) 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).