Convert Microroentgens to Megaroentgens
Convert Microroentgens (µR) to Megaroentgens (MR) instantly and accurately.
Conversion Formula
MR = µR × 1.000000000e-12
About Microroentgens
The microroentgen (µR) equals 2.58 × 10⁻¹⁰ C/kg. Standard unit for very low environmental gamma dose rates in legacy US instrumentation: airborne radiological surveys over background areas report µR/h; EPA environmental monitoring network stations historically logged µR/h for outdoor gamma levels. 1 µR = 2.58 × 10⁻¹⁰ C/kg.
About Megaroentgens
The megaroentgen (MR) equals 258 C/kg. Used only in extreme radiation environments - nuclear detonation effects calculations, prompt gamma pulse environments, and legacy radiation hardness assurance for military electronics specify total ionising exposure in MR(air); calibrated flash X-ray simulators output pulse exposures in MR. 1 MR = 258 C/kg = 10⁶ R.
Quick Reference Table
| Microroentgens (µR) | Megaroentgens (MR) |
|---|---|
| 1 µR | 1 × 10-12 MR |
| 2 µR | 2 × 10-12 MR |
| 5 µR | 5 × 10-12 MR |
| 10 µR | 1 × 10-11 MR |
| 25 µR | 2.5 × 10-11 MR |
| 50 µR | 5 × 10-11 MR |
| 100 µR | 1 × 10-10 MR |