Gray is absorbed dose in joules per kilogram.
Gray to Rad
Convert Gray (Gy) to Rad (rad) instantly. Free online radiation converter with formulas, tables and examples.
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Radiation Converter
Convert radioactivity, absorbed dose, and equivalent dose units by compatible radiation family.
Context values
Some unit families need one extra value for a physically accurate result.
Rad is 0.01 gray.
rad = Gy × 100
Results update instantly for Gray to Rad conversions.
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Formula
1 Gray = 100 Rad
rad = Gy × 100
Gy = rad ÷ 100
Conversion table
| 1 Gy | 100 rad |
| 2 Gy | 200 rad |
| 5 Gy | 500 rad |
| 10 Gy | 1000 rad |
| 20 Gy | 2000 rad |
| 50 Gy | 5000 rad |
| 100 Gy | 10000 rad |
Related conversions
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Frequently asked questions
How many Rads are in one Gray?
One Gray equals 100 Rads.
How do I convert Gray to Rad?
Multiply the number of Grays by 100 to get Rads. To go the other way, multiply Rads by 0.01 (or divide by 100) to get Grays.
Is this conversion exact?
Yes. This conversion uses the exact defined relationship between Gray and Rad, so the result shown is mathematically precise (rounded only for display).
When is Gray to Rad conversion commonly used?
It is commonly used in nuclear medicine, radiation safety, health physics, and scientific research involving radioactivity and radiation dose.
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About this conversion
Gray and Rad are units used in the radiation family of measurements. Both units measure absorbed radiation dose (energy deposited per unit mass). This converter uses the precise relationship 1 Gray = 100 Rads (equivalently 1 Rad = 0.01 Grays), so results stay accurate for nuclear medicine, radiation safety, health physics, and scientific research.