Milligrays to Grays Converter
1 milligray = 0.001 grays
1 milligray equals 0.001 grays
How to convert milligrays to grays
Absorbed dose is deposited energy per mass: 1 Gy = 1 J/kg and 1 rad = 0.01 Gy. Converting to sieverts requires radiation weighting information, rather than a universal unit factor.
Gy = mGy × 0.001One milligray is 0.001 grays, so a single multiplication converts any value.
0.01 Gy = 10 × 0.001Milligrays to grays conversion table
Common values in milligrays, converted to grays.
| Milligrays (mGy) | Grays (Gy) |
|---|---|
| 1 | 0.001 |
| 2 | 0.002 |
| 3 | 0.003 |
| 4 | 0.004 |
| 5 | 0.005 |
| 10 | 0.01 |
| 20 | 0.02 |
| 25 | 0.025 |
| 50 | 0.05 |
| 100 | 0.1 |
| 250 | 0.25 |
| 500 | 0.5 |
| 1,000 | 1 |
About these units
milligraymGy
grayGy
The SI unit of absorbed dose: one joule of radiation energy per kilogram.
Sources and precision
Table results are rounded to 8 significant digits; formula constants may be rounded to 10. Worked example answers use 6 significant digits. The converter starts at 6 significant digits and lets you change display precision. Calculations use the stored factors without intermediate rounding. Exact unit definitions do not make an input measurement more precise; conventional and measured factors follow the assumptions stated here.