Convert Megagrays to Grays
Convert Megagrays (MGy) to Grays (Gy) instantly and accurately.
Conversion Formula
Gy = MGy × 1000000
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.
About Grays
The gray (Gy) is the SI coherent unit of absorbed radiation dose, defined as 1 joule of energy deposited per kilogram of matter. Named after Harold Gray (British radiobiologist, 1905-1965). Used globally in radiotherapy: curative tumour doses 40-80 Gy fractionated; total body irradiation before bone marrow transplant 12-14 Gy. 1 Gy = 1 J/kg = 100 rad.
Quick Reference Table
| Megagrays (MGy) | Grays (Gy) |
|---|---|
| 1 MGy | 1000000 Gy |
| 2 MGy | 2000000 Gy |
| 5 MGy | 5000000 Gy |
| 10 MGy | 10000000 Gy |
| 25 MGy | 25000000 Gy |
| 50 MGy | 50000000 Gy |
| 100 MGy | 100000000 Gy |