Convert Millirads to Rads
Convert Millirads (mrad) to Rads (rad) instantly and accurately.
Conversion Formula
rad = mrad × 0.001
About Millirads
The millirad (mrad) equals 10⁻³ rad = 10⁻⁵ Gy = 10 µGy. Older US health physics reports and NRC licence conditions quote occupational extremity doses in mrad; some film badge dosimetry reports still use mrad for historical continuity. 1 mrad = 10⁻³ rad = 10⁻⁵ Gy = 10 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
| Millirads (mrad) | Rads (rad) |
|---|---|
| 1 mrad | 0.001 rad |
| 2 mrad | 0.002 rad |
| 5 mrad | 0.005 rad |
| 10 mrad | 0.01 rad |
| 25 mrad | 0.025 rad |
| 50 mrad | 0.05 rad |
| 100 mrad | 0.1 rad |