Gray is absorbed dose in joules per kilogram.
Gray to Milligray
Convert Gray (Gy) to Milligray (mGy) 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.
Milligray is 0.001 gray units.
mGy = Gy × 1000
Results update instantly for Gray to Milligray conversions.
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Formula
1 Gray = 1000 Milligray
mGy = Gy × 1000
Gy = mGy ÷ 1000
Conversion table
| 1 Gy | 1000 mGy |
| 2 Gy | 2000 mGy |
| 5 Gy | 5000 mGy |
| 10 Gy | 10000 mGy |
| 20 Gy | 20000 mGy |
| 50 Gy | 50000 mGy |
| 100 Gy | 100000 mGy |
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Frequently asked questions
How many Milligrays are in one Gray?
One Gray equals 1000 Milligrays.
How do I convert Gray to Milligray?
Multiply the number of Grays by 1000 to get Milligrays. To go the other way, multiply Milligrays by 0.001 (or divide by 1000) to get Grays.
Is this conversion exact?
Yes. This conversion uses the exact defined relationship between Gray and Milligray, so the result shown is mathematically precise (rounded only for display).
When is Gray to Milligray 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 Milligray 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 = 1000 Milligrays (equivalently 1 Milligray = 0.001 Grays), so results stay accurate for nuclear medicine, radiation safety, health physics, and scientific research.