Gray is absorbed dose in joules per kilogram.
Gray to Kilogray
Convert Gray (Gy) to Kilogray (kGy) 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.
Kilogray is 1000 gray units.
kGy = Gy × 0.001
Results update instantly for Gray to Kilogray conversions.
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Formula
1 Gray = 0.001 Kilogray
kGy = Gy × 0.001
Gy = kGy ÷ 0.001
Conversion table
| 1 Gy | 0.001 kGy |
| 2 Gy | 0.002 kGy |
| 5 Gy | 0.005 kGy |
| 10 Gy | 0.01 kGy |
| 20 Gy | 0.02 kGy |
| 50 Gy | 0.05 kGy |
| 100 Gy | 0.1 kGy |
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Frequently asked questions
How many Kilograys are in one Gray?
One Gray equals 0.001 Kilograys.
How do I convert Gray to Kilogray?
Multiply the number of Grays by 0.001 to get Kilograys. To go the other way, multiply Kilograys by 1000 (or divide by 0.001) to get Grays.
Is this conversion exact?
Yes. This conversion uses the exact defined relationship between Gray and Kilogray, so the result shown is mathematically precise (rounded only for display).
When is Gray to Kilogray 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 Kilogray 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 = 0.001 Kilograys (equivalently 1 Kilogray = 1000 Grays), so results stay accurate for nuclear medicine, radiation safety, health physics, and scientific research.