Convert Milligrays to Megagrays
Convert Milligrays (mGy) to Megagrays (MGy) instantly and accurately.
Conversion Formula
MGy = mGy × 1.000000000e-9
About Milligrays
The milligray (mGy) equals 10⁻³ Gy and is the standard unit for diagnostic radiology patient doses. CT head scan ~20-60 mGy; abdominal CT ~10-30 mGy; mammography mean glandular dose ~1-3 mGy. IAEA and EU medical exposure directives set diagnostic reference levels in mGy. 1 mGy = 10⁻³ Gy = 0.1 rad.
About Megagrays
The megagray (MGy) equals 10⁶ Gy. Doses in the MGy range destroy virtually all molecular structures. Radiation chemistry of water reaches radical recombination equilibrium above 1 MGy; neutron-irradiated reactor pressure vessel steels accumulate fast-neutron damage equivalent to 0.01-1 MGy over a 40-year lifetime. 1 MGy = 10⁶ Gy = 10⁸ rad.
Quick Reference Table
| Milligrays (mGy) | Megagrays (MGy) |
|---|---|
| 1 mGy | 1 × 10-9 MGy |
| 2 mGy | 2 × 10-9 MGy |
| 5 mGy | 5 × 10-9 MGy |
| 10 mGy | 1 × 10-8 MGy |
| 25 mGy | 2.5 × 10-8 MGy |
| 50 mGy | 5 × 10-8 MGy |
| 100 mGy | 1 × 10-7 MGy |