Converter group
Radiology Converters
Radiation - Absorbed Dose Converter
Result
... Gray = ... Milligray
Find the units to convert
Gray to Milligray Converter
Use this page to convert gray values into milligray, with background details, formulas, a worked example, and a quick conversion table.
Conversion formula
1 Gy = 1,000 mGy
1 mGy = 0.001 Gy
Example: 1 Gy = 1,000 mGy
Gray
Defined as the absorption of one joule of radiation energy per kilogram of matter.
History: Named after Louis Harold Gray, a pioneer in the field of radiobiology. Adopted by the CGPM in 1975.
Current use: The primary international unit used in radiotherapy, radiation protection, and radiobiology.
Also written as Gy, grays.
Milligray
One milligray is equal to 0.001 grays.
History: Standard SI prefix applied to the gray.
Current use: Commonly used in diagnostic radiology to express patient doses (e.g., CT scans).
Also written as mGy, milligrays.
Gray to Milligray table
| Gray [Gy] | Milligray [mGy] |
|---|---|
| 0.01 Gy | 10 mGy |
| 0.1 Gy | 100 mGy |
| 1 Gy | 1,000 mGy |
| 2 Gy | 2,000 mGy |
| 5 Gy | 5,000 mGy |
| 10 Gy | 10,000 mGy |
| 20 Gy | 20,000 mGy |
| 50 Gy | 50,000 mGy |
| 100 Gy | 100,000 mGy |
Frequently asked questions
How many Milligray (mGy) are in one Gray (Gy)?
One Gray equals 1,000 Milligray.
How do you convert Gray to Milligray?
Multiply the Gray value by 1,000 to get the result in Milligray.
How do you convert Milligray back to Gray?
Multiply the Milligray value by 0.001 to get back to Gray.
What is 1 Gray in Milligray?
1 Gray equals 1,000 Milligray.