Convert Grays to Milligrays
Convert Grays (Gy) to Milligrays (mGy) instantly and accurately.
Conversion Formula
mGy = Gy × 1000
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.
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.
Quick Reference Table
| Grays (Gy) | Milligrays (mGy) |
|---|---|
| 1 Gy | 1000 mGy |
| 2 Gy | 2000 mGy |
| 5 Gy | 5000 mGy |
| 10 Gy | 10000 mGy |
| 25 Gy | 25000 mGy |
| 50 Gy | 50000 mGy |
| 100 Gy | 100000 mGy |