Convert Milliroentgens to Coulombs per kilogram
Convert Milliroentgens (mR) to Coulombs per kilogram (C/kg) instantly and accurately.
Conversion Formula
C/kg = mR × 2.580000000e-7
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 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.
Quick Reference Table
| Milliroentgens (mR) | Coulombs per kilogram (C/kg) |
|---|---|
| 1 mR | 2.58 × 10-7 C/kg |
| 2 mR | 5.16 × 10-7 C/kg |
| 5 mR | 1.29 × 10-6 C/kg |
| 10 mR | 2.58 × 10-6 C/kg |
| 25 mR | 6.45 × 10-6 C/kg |
| 50 mR | 1.29 × 10-5 C/kg |
| 100 mR | 2.58 × 10-5 C/kg |