Rads to Grays (rad to Gy)
Free online rad to gray converter. Type a value, get an instant exact result — plus the formula, a ready-made conversion table, and reverse conversion.
RADIATION ABSORBED DOSE CONVERTER — INSTANT RESULT
Formula: multiply the rad value by 0.01 — i.e. Gy = rad × 0.01
Quick check: 1 rad = 0.01 Gy
Quick check: 1 rad = 0.01 Gy
Rads to Grays conversion table
| Rads (rad) | Grays (Gy) |
|---|---|
| 1 rad | 0.01 Gy |
| 2 rad | 0.02 Gy |
| 3 rad | 0.03 Gy |
| 4 rad | 0.04 Gy |
| 5 rad | 0.05 Gy |
| 6 rad | 0.06 Gy |
| 7 rad | 0.07 Gy |
| 8 rad | 0.08 Gy |
| 9 rad | 0.09 Gy |
| 10 rad | 0.1 Gy |
| 15 rad | 0.15 Gy |
| 20 rad | 0.2 Gy |
| 25 rad | 0.25 Gy |
| 30 rad | 0.3 Gy |
| 40 rad | 0.4 Gy |
| 50 rad | 0.5 Gy |
| 75 rad | 0.75 Gy |
| 100 rad | 1 Gy |
| 250 rad | 2.5 Gy |
| 500 rad | 5 Gy |
| 1,000 rad | 10 Gy |
How to convert rads to grays
To convert rads to grays, multiply the amount in rads by 0.01. For example, 10 rad = 0.1 Gy. To convert in the other direction, divide by the same factor, or use the ⇄ swap button above.
Convert absorbed radiation dose between grays and rads. One gray is one joule per kilogram of tissue — exactly 100 rads.
Frequently asked questions
How many grays are in one rad?
One rad is exactly 0.01 grays.
How do I convert rad to Gy?
Multiply the rad value by 0.01 to get Gy. The converter at the top of this page does this automatically and works in both directions.
How much is 100 rads in grays?
100 rads equals 1 grays.