Convert Grays per minute to Millirads per hour
Convert Grays per minute (Gy/min) to Millirads per hour (mrad/h) instantly and accurately.
Conversion Formula
mrad/h = Gy/min × 6000000
About Grays per minute
The gray per minute (Gy/min) is the primary clinical radiotherapy machine output unit. Standard linac dose rates are 1-6 Gy/min at isocentre; stereotactic body radiotherapy (SBRT) uses up to 10 Gy/min; ¹⁹²Ir HDR brachytherapy sources are characterised in Gy/min at 1 cm reference distance. 1 Gy/min = 100 rad/min ≈ 1.67×10⁻² Gy/s.
About Millirads per hour
The millirad per hour (mrad/h) equals 1e-5 Gy/h = 10 µGy/h. Legacy US radiation protection unit used by area monitors and Geiger counters calibrated before SI adoption; EPA environmental surveillance stations report in mrad/h alongside µGy/h; NRC licence boundary dose-rate surveys often cite mrad/h. 1 mrad/h = 1e-5 Gy/h = 10 µGy/h.
Quick Reference Table
| Grays per minute (Gy/min) | Millirads per hour (mrad/h) |
|---|---|
| 1 Gy/min | 6000000 mrad/h |
| 2 Gy/min | 12000000 mrad/h |
| 5 Gy/min | 30000000 mrad/h |
| 10 Gy/min | 60000000 mrad/h |
| 25 Gy/min | 150000000 mrad/h |
| 50 Gy/min | 300000000 mrad/h |
| 100 Gy/min | 600000000 mrad/h |