Radiation Dose
mGytoGy
Convert milligrays (mGy) to grays (Gy).
Factor1 mGy = 0.001 Gy
Converter
mGy
Accepts numbers or expressions, e.g. 150 + 14.7
Result
Gy
Rendered to 6 significant figures.
Formula
Formula
Gy = mGy × 0.001
Multiply any value in milligrays by 0.001 to obtain the value in grays.
Worked example
Convert 1000 mGy to Gy.
- 01Start with 1000 mGy.
- 02Multiply by the conversion factor: 1000 × 0.001 = 1 Gy.
Result1000 mGy = 1 Gy
Conversion table
| mGy | Gy |
|---|---|
| 1 | 0.001 |
| 2 | 0.002 |
| 5 | 0.005 |
| 10 | 0.01 |
| 20 | 0.02 |
| 50 | 0.05 |
| 100 | 0.1 |
| 200 | 0.2 |
| 500 | 0.5 |
| 1000 | 1 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from mGy to Gy?
1 mGy equals 0.001 Gy. To convert, multiply the value in milligrays by 0.001.
How do I convert 1 mGy to Gy?
1 mGy = 0.001 Gy. For any value, multiply by 0.001.
How do I convert Gy back to mGy?
Divide by the same factor — or equivalently, multiply by 1000. So 1 Gy = 1000 mGy.
When would I need to convert milligray to gray?
Radiation absorbed-dose conversions between mGy and Gy are used in radiological protection, medical physics, and nuclear-industry health physics. Gray (Gy) is the SI standard; rad remains common in older US health-physics documentation (1 Gy = 100 rad).
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).