Convert Rads to Microrads
Convert Rads (rad) to Microrads (µrad) instantly and accurately.
Conversion Formula
µrad = rad × 1000000
About Rads
The rad (rad) equals exactly 0.01 Gy = 100 erg/g. The pre-SI unit of absorbed dose, defined by the ICRU in 1953, still widely used in the US in radiation therapy (cGy = rad numerically), radiation biology, and NRC regulations. Whole-body 50% lethal dose (LD50) for humans ~350-450 rad. 1 rad = 0.01 Gy = 1 cGy.
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
| Rads (rad) | Microrads (µrad) |
|---|---|
| 1 rad | 1000000 µrad |
| 2 rad | 2000000 µrad |
| 5 rad | 5000000 µrad |
| 10 rad | 10000000 µrad |
| 25 rad | 25000000 µrad |
| 50 rad | 50000000 µrad |
| 100 rad | 100000000 µrad |