Gray is absorbed dose in joules per kilogram.
Gray to Hectogray
Convert Gray (Gy) to Hectogray (hGy) 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.
Hectogray is 100 gray units.
hGy = Gy × 0.01
Results update instantly for Gray to Hectogray conversions.
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Formula
1 Gray = 0.01 Hectogray
hGy = Gy × 0.01
Gy = hGy ÷ 0.01
Conversion table
| 1 Gy | 0.01 hGy |
| 2 Gy | 0.02 hGy |
| 5 Gy | 0.05 hGy |
| 10 Gy | 0.1 hGy |
| 20 Gy | 0.2 hGy |
| 50 Gy | 0.5 hGy |
| 100 Gy | 1 hGy |
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Frequently asked questions
How many Hectograys are in one Gray?
One Gray equals 0.01 Hectograys.
How do I convert Gray to Hectogray?
Multiply the number of Grays by 0.01 to get Hectograys. To go the other way, multiply Hectograys by 100 (or divide by 0.01) to get Grays.
Is this conversion exact?
Yes. This conversion uses the exact defined relationship between Gray and Hectogray, so the result shown is mathematically precise (rounded only for display).
When is Gray to Hectogray 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 Hectogray 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 = 0.01 Hectograys (equivalently 1 Hectogray = 100 Grays), so results stay accurate for nuclear medicine, radiation safety, health physics, and scientific research.