Convert Coulombs per kilogram to Milliroentgens
Convert Coulombs per kilogram (C/kg) to Milliroentgens (mR) instantly and accurately.
Conversion Formula
mR = C/kg × 3875968.992
About Coulombs per kilogram
The coulomb per kilogram (C/kg) is the SI derived unit of radiation exposure, equal to 1 coulomb of ion charge liberated per kilogram of dry air. It replaced the roentgen in SI. Calibration of clinical X-ray beams with free-air ionisation chambers and parallel-plate chambers yields results in C/kg. 1 C/kg ≈ 3876 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
| Coulombs per kilogram (C/kg) | Milliroentgens (mR) |
|---|---|
| 1 C/kg | 3875970 mR |
| 2 C/kg | 7751940 mR |
| 5 C/kg | 19379800 mR |
| 10 C/kg | 38759700 mR |
| 25 C/kg | 96899200 mR |
| 50 C/kg | 193798000 mR |
| 100 C/kg | 387597000 mR |