Convert Microrads to Rads
Convert Microrads (µrad) to Rads (rad) instantly and accurately.
Conversion Formula
rad = µrad × 1.000000000e-6
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.
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.
Quick Reference Table
| Microrads (µrad) | Rads (rad) |
|---|---|
| 1 µrad | 1 × 10-6 rad |
| 2 µrad | 2 × 10-6 rad |
| 5 µrad | 5 × 10-6 rad |
| 10 µrad | 1 × 10-5 rad |
| 25 µrad | 2.5 × 10-5 rad |
| 50 µrad | 5 × 10-5 rad |
| 100 µrad | 1 × 10-4 rad |