Convert Millicoulombs per kilogram to Milliroentgens

Convert Millicoulombs per kilogram (mC/kg) to Milliroentgens (mR) instantly and accurately.

Millicoulombs per kilogram (mC/kg)
Milliroentgens (mR)

Conversion Formula

mR = mC/kg × 3875.968992

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.

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

Millicoulombs per kilogram (mC/kg)Milliroentgens (mR)
1 mC/kg3875.97 mR
2 mC/kg7751.94 mR
5 mC/kg19379.8 mR
10 mC/kg38759.7 mR
25 mC/kg96899.2 mR
50 mC/kg193798 mR
100 mC/kg387597 mR

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