Convert Grays to Megarads
Convert Grays (Gy) to Megarads (Mrad) instantly and accurately.
Conversion Formula
Mrad = Gy × 0.0001
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 Megarads
The megarad (Mrad) equals 10⁶ rad = 10⁴ Gy. Used in radiation hardening of electronics and wire/cable insulation: cross-linked polyethylene (XLPE) cable insulation is cured at 5-20 Mrad; some legacy radiation hardness assurance (RHA) test reports for space electronics quote doses in Mrad(Si). 1 Mrad = 10⁴ Gy = 10 kGy.
Quick Reference Table
| Grays (Gy) | Megarads (Mrad) |
|---|---|
| 1 Gy | 0.0001 Mrad |
| 2 Gy | 0.0002 Mrad |
| 5 Gy | 0.0005 Mrad |
| 10 Gy | 0.001 Mrad |
| 25 Gy | 0.0025 Mrad |
| 50 Gy | 0.005 Mrad |
| 100 Gy | 0.01 Mrad |