Rads to Grays Converter
1 rad = 0.01 grays
Unrelated to the radian, the unit of angle.
1 rad equals 0.01 grays
How to convert rads 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 = rad × 0.01One rad is 0.01 grays, so a single multiplication converts any value.
0.1 Gy = 10 × 0.01Unrelated to the radian, the unit of angle.
Rads to grays conversion table
Common values in rads, converted to grays.
| Rads (rad) | Grays (Gy) |
|---|---|
| 1 | 0.01 |
| 2 | 0.02 |
| 3 | 0.03 |
| 4 | 0.04 |
| 5 | 0.05 |
| 10 | 0.1 |
| 20 | 0.2 |
| 25 | 0.25 |
| 50 | 0.5 |
| 100 | 1 |
| 250 | 2.5 |
| 500 | 5 |
| 1,000 | 10 |
About these units
radrad
The legacy unit of absorbed dose: exactly 0.01 gray.
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.