放射能は、不安定な原子核が放射によってエネルギーを失うプロセスです。Beckerels（BQ）で測定されます。
1 rad = 10,000,000 nGy
1 nGy = 1.0000e-7 rad
例:
15 radをナノグレイに変換します。
15 rad = 150,000,000 nGy
| rad | ナノグレイ |
|---|---|
| 0.01 rad | 100,000 nGy |
| 0.1 rad | 1,000,000 nGy |
| 1 rad | 10,000,000 nGy |
| 2 rad | 20,000,000 nGy |
| 3 rad | 30,000,000 nGy |
| 5 rad | 50,000,000 nGy |
| 10 rad | 100,000,000 nGy |
| 20 rad | 200,000,000 nGy |
| 30 rad | 300,000,000 nGy |
| 40 rad | 400,000,000 nGy |
| 50 rad | 500,000,000 nGy |
| 60 rad | 600,000,000 nGy |
| 70 rad | 700,000,000 nGy |
| 80 rad | 800,000,000 nGy |
| 90 rad | 900,000,000 nGy |
| 100 rad | 1,000,000,000 nGy |
| 250 rad | 2,500,000,000 nGy |
| 500 rad | 5,000,000,000 nGy |
| 750 rad | 7,500,000,000 nGy |
| 1000 rad | 10,000,000,000 nGy |
| 10000 rad | 100,000,000,000 nGy |
| 100000 rad | 1,000,000,000,000 nGy |
Inayam