Convert Rads to Megarads
Convert Rads (rad) to Megarads (Mrad) instantly and accurately.
Conversion Formula
Mrad = rad × 1.000000000e-6
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 Megarads
The megarad (Mrad) equals 10⁶ rad = 10⁴ Gy. Used in radiation hardening of electronics and wire/cable insulation: cross-linked polyethylene (XLPE) cable insulation is cured at 5-20 Mrad; some legacy radiation hardness assurance (RHA) test reports for space electronics quote doses in Mrad(Si). 1 Mrad = 10⁴ Gy = 10 kGy.
Quick Reference Table
| Rads (rad) | Megarads (Mrad) |
|---|---|
| 1 rad | 1 × 10-6 Mrad |
| 2 rad | 2 × 10-6 Mrad |
| 5 rad | 5 × 10-6 Mrad |
| 10 rad | 1 × 10-5 Mrad |
| 25 rad | 2.5 × 10-5 Mrad |
| 50 rad | 5 × 10-5 Mrad |
| 100 rad | 1 × 10-4 Mrad |