Convert rad to gray
1 rad equals 0.01 grays. Enter a value below to convert instantly.
Need the other direction? Convert gray to rad →
Formula
Multiply the number of rads by 0.01 to get grays.
Step by step
- Start with 1 rad.
- Multiply by the conversion factor 0.01.
- 1 × 0.01 = 0.01 Gy.
Rads to Grays conversion table
| Rads (rad) | Grays (Gy) |
|---|---|
| 1 | 0.01 |
| 2 | 0.02 |
| 5 | 0.05 |
| 10 | 0.1 |
| 20 | 0.2 |
| 50 | 0.5 |
| 100 | 1 |
Convert Rad to other radiation dose units
1 rad expressed in every other radiation dose unit on this site.
- Gray Gy 0.01
- Kilogray kGy 0.00001
- Milligray mGy 10
- Microgray µGy 10,000
- Rad rad 1
- Millirad mrad 1,000
- Joule per Kilogram J/kg 0.01
- Joule per Centigram J/cg 1e-7
- Joule per Milligram J/mg 1e-8
- Megagray MGy 1e-8
- Dekagray daGy 0.001
- Decigray dGy 0.1
- Exagray EGy 1e-20
- Petagray PGy 1e-17
- Teragray TGy 1e-14
- Gigagray GGy 1e-11
- Hectogray hGy 0.0001
- Nanogray nGy 10,000,000
- Picogray pGy 10,000,000,000
- Femtogray fGy 10,000,000,000,000
- Attogray aGy 1e+16
- Joule per Gram J/g 0.00001
- Erg per Gram erg/g 100
- Sievert Sv 0.01
- Millisievert mSv 10
- Microsievert µSv 10,000
- Nanosievert nSv 10,000,000
- Rem rem 1
- Millirem mrem 1,000
About the rad
The rad (rad) is a Other unit of radiation dose.
About the gray
The gray (Gy) is a SI unit of radiation dose. SI absorbed dose: one joule of radiation energy per kilogram of matter.
Where this conversion is used
Converting rads to grays comes up when medical imaging, occupational safety, and radiotherapy planning. Grays measure absorbed energy while sieverts weight it for biological harm; they match one-for-one only for X-rays, gamma, and beta radiation.
Related conversions
Frequently asked questions
How many grays are in a rad?
One rad equals 0.01 grays.
How do you convert rads to grays?
Multiply the number of rads by 0.01 to get grays.
What is 1 gray in rads?
One gray equals 100 rads.
When would I convert rads to grays?
This conversion is common when medical imaging, occupational safety, and radiotherapy planning.
Conversion factors are based on internationally agreed unit definitions. See our methodology and sources for details on how these values are verified.