Converter group
Radiology Converters
Radiation - Absorbed Dose Converter
Result
... Milligray = ... Gray
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Milligray to Gray Converter
Use this page to convert milligray values into gray, with background details, formulas, a worked example, and a quick conversion table.
Conversion formula
1 mGy = 0.001 Gy
1 Gy = 1,000 mGy
Example: 1 mGy = 0.001 Gy
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
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 to Gray table
| Milligray [mGy] | Gray [Gy] |
|---|---|
| 0.01 mGy | 0.00001 Gy |
| 0.1 mGy | 0.0001 Gy |
| 1 mGy | 0.001 Gy |
| 2 mGy | 0.002 Gy |
| 5 mGy | 0.005 Gy |
| 10 mGy | 0.01 Gy |
| 20 mGy | 0.02 Gy |
| 50 mGy | 0.05 Gy |
| 100 mGy | 0.1 Gy |
Frequently asked questions
How many Gray (Gy) are in one Milligray (mGy)?
One Milligray equals 0.001 Gray.
How do you convert Milligray to Gray?
Multiply the Milligray value by 0.001 to get the result in Gray.
How do you convert Gray back to Milligray?
Multiply the Gray value by 1,000 to get back to Milligray.
What is 1 Milligray in Gray?
1 Milligray equals 0.001 Gray.