Convert Milligray to Gray
Live bidirectional calculator for Milligrays (mGy) and Grays (Gy) with verified formula and conversion charts.
Absorbed Radiation Dose4 units
How the Calculation Works (Linear Scaling)
Since 1 Gray = 1000 Milligrays, divide the value in Milligrays by 1000.
Milligray to Gray Conversion Table
Precomputed values for quick reference and printing.
| Milligray | Gray |
|---|---|
| 1 mGy | 0.001 Gy |
| 2 mGy | 0.002 Gy |
| 3 mGy | 0.003 Gy |
| 4 mGy | 0.004 Gy |
| 5 mGy | 0.005 Gy |
| 6 mGy | 0.006 Gy |
| 7 mGy | 0.007 Gy |
| 8 mGy | 0.008 Gy |
| 9 mGy | 0.009 Gy |
| 10 mGy | 0.01 Gy |
| 15 mGy | 0.015 Gy |
| 20 mGy | 0.02 Gy |
| 25 mGy | 0.025 Gy |
| 30 mGy | 0.03 Gy |
| 40 mGy | 0.04 Gy |
| 50 mGy | 0.05 Gy |
| 75 mGy | 0.075 Gy |
| 100 mGy | 0.1 Gy |
| Gray | Milligray |
|---|---|
| 1 Gy | 1000 mGy |
| 2 Gy | 2000 mGy |
| 3 Gy | 3000 mGy |
| 4 Gy | 4000 mGy |
| 5 Gy | 5000 mGy |
| 6 Gy | 6000 mGy |
| 7 Gy | 7000 mGy |
| 8 Gy | 8000 mGy |
| 9 Gy | 9000 mGy |
| 10 Gy | 10000 mGy |
| 15 Gy | 15000 mGy |
| 20 Gy | 20000 mGy |
| 25 Gy | 25000 mGy |
| 30 Gy | 30000 mGy |
| 40 Gy | 40000 mGy |
| 50 Gy | 50000 mGy |
| 75 Gy | 75000 mGy |
| 100 Gy | 100000 mGy |
About Milligray (mGy)
One thousandth of a gray (10โปยณ Gy = 1 mJ/kg).
History: Standard metric clinical submultiple used for diagnostic imaging patient radiation doses.
Common Uses: Computed tomography (CT) scan dose index (CTDIvol ~10โ30 mGy), dental X-ray organ dose measurement.
About Gray (Gy)
The SI coherent derived unit of absorbed radiation dose, defined as the absorption of 1 joule of ionizing radiation energy per kilogram of matter (1 Gy = 1 J/kg).
History: Named in 1975 after British radiobiologist Louis Harold Gray (1905โ1965), pioneer in the measurement of radiation absorption in biological tissue.
Common Uses: Radiation oncology treatment dose prescriptions (e.g. 50โ70 Gy tumor dose), industrial radiation crosslinking, food irradiation processing.
โ Frequently Asked Questions
How many Grays are in 1 Milligray?
There are exactly 0.001 Grays in 1 Milligray (1 mGy = 0.001 Gy).
What is the formula to convert Milligray to Gray?
The formula is: Gray = Milligray / 1000. Since 1 Gray = 1000 Milligrays, divide the value in Milligrays by 1000.
How do I convert 1 mGy to Gy manually?
To convert 1 mGy to Gy: apply the formula Gray = Milligray / 1000. Substituting gives: 1 / 1000 = 0.001 Gy.