Convert Milliroentgens to Millicoulombs per kilogram
Convert Milliroentgens (mR) to Millicoulombs per kilogram (mC/kg) instantly and accurately.
Conversion Formula
mC/kg = mR × 0.000258
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.
About Millicoulombs per kilogram
The millicoulomb per kilogram (mC/kg) equals 10⁻³ C/kg ≈ 3.88 R. Used in high-dose-rate X-ray beam calibration protocols (IAEA TRS-398, AAPM TG-51) where free-air chambers accumulate mC/kg of charge per irradiation; high-energy medical linac beams deliver calibration exposures measured in mC/kg. 1 mC/kg = 10⁻³ C/kg ≈ 3.88 R.
Quick Reference Table
| Milliroentgens (mR) | Millicoulombs per kilogram (mC/kg) |
|---|---|
| 1 mR | 0.000258 mC/kg |
| 2 mR | 0.000516 mC/kg |
| 5 mR | 0.00129 mC/kg |
| 10 mR | 0.00258 mC/kg |
| 25 mR | 0.00645 mC/kg |
| 50 mR | 0.0129 mC/kg |
| 100 mR | 0.0258 mC/kg |