Convert Grays to Microrads
Convert Grays (Gy) to Microrads (µrad) instantly and accurately.
Conversion Formula
µrad = Gy × 100000000
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 Microrads
The microrad (µrad) equals 10⁻⁶ rad = 10⁻⁸ Gy. Used in legacy US radiological instrumentation calibration documentation for very low-level survey instrument thresholds; some older NRC and EPA radiation protection records quote environmental dose rates in µrad/h when modern instruments report nGy/h. 1 µrad = 10⁻⁸ Gy = 10⁻² µGy.
Quick Reference Table
| Grays (Gy) | Microrads (µrad) |
|---|---|
| 1 Gy | 100000000 µrad |
| 2 Gy | 200000000 µrad |
| 5 Gy | 500000000 µrad |
| 10 Gy | 1000000000 µrad |
| 25 Gy | 2.5 × 109 µrad |
| 50 Gy | 5 × 109 µrad |
| 100 Gy | 1 × 1010 µrad |