Convert Megaroentgens to Milliroentgens
Convert Megaroentgens (MR) to Milliroentgens (mR) instantly and accurately.
Conversion Formula
mR = MR × 1000000000
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.
About Milliroentgens
The milliroentgen (mR) equals 2.58 × 10⁻⁷ C/kg. Standard unit in US health physics for area gamma surveys: personal dosimeters and Geiger counters in medical and industrial radiography settings display mR/h; NRC licence conditions often specify dose-rate limits in mR/h at facility boundaries. 1 mR = 2.58 × 10⁻⁷ C/kg.
Quick Reference Table
| Megaroentgens (MR) | Milliroentgens (mR) |
|---|---|
| 1 MR | 1000000000 mR |
| 2 MR | 2 × 109 mR |
| 5 MR | 5 × 109 mR |
| 10 MR | 1 × 1010 mR |
| 25 MR | 2.5 × 1010 mR |
| 50 MR | 5 × 1010 mR |
| 100 MR | 1 × 1011 mR |