Density and Mass
grtost
Convert grains (gr) to stones (st).
Factor1 gr = 1.020409e-5 st
Converter
gr
Accepts numbers or expressions, e.g. 150 + 14.7
Result
st
Rendered to 6 significant figures.
Formula
Formula
st = gr × 1.020409e-5
Multiply any value in grains by 1.020409e-5 to obtain the value in stones.
Worked example
Convert 1.00000e+6 gr to st.
- 01Start with 1.00000e+6 gr.
- 02Multiply by the conversion factor: 1.00000e+6 × 1.020409e-5 = 10.2041 st.
Result1.00000e+6 gr = 10.2041 st
Conversion table
| gr | st |
|---|---|
| 1 | 1.0204e-5 |
| 2 | 2.0408e-5 |
| 5 | 5.102e-5 |
| 10 | 0.00010204 |
| 20 | 0.00020408 |
| 50 | 0.0005102 |
| 100 | 0.0010204 |
| 200 | 0.0020408 |
| 500 | 0.005102 |
| 1000 | 0.010204 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from gr to st?
1 gr equals 1.020409e-5 st. To convert, multiply the value in grains by 1.020409e-5.
How do I convert 1 gr to st?
1 gr = 1.02041e-5 st. For any value, multiply by 1.020409e-5.
How do I convert st back to gr?
Divide by the same factor — or equivalently, multiply by 97999.95. So 1 st = 98000 gr.
When would I need to convert grain (troy/apothecary) to stone (UK 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).