Hectogray is 100 gray units.
Hectogray to Gray
Convert Hectogray (hGy) to Gray (Gy) 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.
Gray is absorbed dose in joules per kilogram.
Gy = hGy × 100
Results update instantly for Hectogray to Gray conversions.
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Formula
1 Hectogray = 100 Gray
Gy = hGy × 100
hGy = Gy ÷ 100
Conversion table
| 1 hGy | 100 Gy |
| 2 hGy | 200 Gy |
| 5 hGy | 500 Gy |
| 10 hGy | 1000 Gy |
| 20 hGy | 2000 Gy |
| 50 hGy | 5000 Gy |
| 100 hGy | 10000 Gy |
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Frequently asked questions
How many Grays are in one Hectogray?
One Hectogray equals 100 Grays.
How do I convert Hectogray to Gray?
Multiply the number of Hectograys by 100 to get Grays. To go the other way, multiply Grays by 0.01 (or divide by 100) to get Hectograys.
Is this conversion exact?
Yes. This conversion uses the exact defined relationship between Hectogray and Gray, so the result shown is mathematically precise (rounded only for display).
When is Hectogray to Gray 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
Hectogray and Gray 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 Hectogray = 100 Grays (equivalently 1 Gray = 0.01 Hectograys), so results stay accurate for nuclear medicine, radiation safety, health physics, and scientific research.