Convert Millirads per hour to Grays per minute
Convert Millirads per hour (mrad/h) to Grays per minute (Gy/min) instantly and accurately.
Conversion Formula
Gy/min = mrad/h × 1.666666667e-7
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.
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.
Quick Reference Table
| Millirads per hour (mrad/h) | Grays per minute (Gy/min) |
|---|---|
| 1 mrad/h | 1.667 × 10-7 Gy/min |
| 2 mrad/h | 3.333 × 10-7 Gy/min |
| 5 mrad/h | 8.333 × 10-7 Gy/min |
| 10 mrad/h | 1.667 × 10-6 Gy/min |
| 25 mrad/h | 4.167 × 10-6 Gy/min |
| 50 mrad/h | 8.333 × 10-6 Gy/min |
| 100 mrad/h | 1.667 × 10-5 Gy/min |