Exposure Converter

Convert between all radiation exposure units instantly. Select your units from the dropdowns below and enter a value to see the conversion in real-time.

SI unit: coulomb per kilogram (C/kg)

Conversion Formula

About Exposure Units

Common Exposure Conversions

• 1 R = 2.58 × 10^-4 C/kg (exact, 1962 ICRU definition)
• 1 C/kg ≈ 3876 R  |  1 mC/kg ≈ 3.876 R  |  1 µC/kg ≈ 3.876 mR
• 1 kR = 0.258 C/kg  |  1 MR = 258 C/kg
• Background gamma at sea level: ~8-10 µR/h ≈ 2-3 pC/kg/s
• Chest X-ray entrance exposure: ~20-40 mR ≈ 5-10 µC/kg
• Radiation survey instrument display: typically in mR/h or µSv/h

Direct Converters