Convert Gray to Milligray
Use this free converter to change gray (Gy) into milligray (mGy). Gray and milligray both measure radiation (absorbed dose). As a quick reference, 1 Gy equals 1000 mGy, and 1 mGy equals 0.001 Gy.
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Milligray (mGy)
1000
1 Gy = 1000 mGy
Radiation (Absorbed Dose) conversion table
| Gray | Milligray |
|---|---|
| 0.01 | 10 |
| 0.1 | 100 |
| 0.5 | 500 |
| 1 | 1000 |
| 2 | 2000 |
| 3 | 3000 |
| 5 | 5000 |
| 10 | 10000 |
| 20 | 20000 |
| 25 | 25000 |
| 50 | 50000 |
| 100 | 100000 |
| 1,000 | 1000000 |
How to convert Gray to Milligray
Multiply the gray value by 1000 to get milligray.
- Enter the number of gray you want to convert.
- The converter instantly shows the equivalent value in milligray.
- Worked example: 15 Gy × 1000 = 15000 mGy.
- Use the swap button to reverse the conversion (milligray to gray).
About these units
Gray (Gy)
- Definition
- The gray (Gy) is the SI unit of absorbed radiation dose, equal to one joule of energy deposited per kilogram of matter.
- History
- Named after British radiobiologist Louis Harold Gray and adopted by the CGPM in 1975, replacing the older rad.
- Current use
- Grays describe doses in radiation therapy, nuclear accidents, and radiobiology research.
Milligray (mGy)
- Definition
- A milligray (mGy) is one thousandth of a gray.
- History
- A metric sub-multiple of the gray used for lower diagnostic doses.
- Current use
- CT scans typically deliver organ doses of 10–30 mGy; milligray is standard in diagnostic radiology.
Frequently asked questions
How many milligray are in a gray?
There are 1000 mGy in 1 Gy. To convert, multiply the number of gray by 1000.
How do I convert gray to milligray?
Multiply the gray value by 1000 to get milligray. For example, 10 Gy = 10000 mGy.
Is this gray-to-milligray converter free?
Yes. This converter is completely free, runs entirely in your browser, and requires no sign-up. Your inputs never leave your device.
Convert Gray to other radiation (absorbed dose) units
| Unit | 1 Gray equals |
|---|---|
| Milligray (mGy) | 1000 mGy |
| Centigray (cGy) | 100 cGy |
| Microgray (µGy) | 1000000 µGy |
| Rad (rad) | 100 rad |