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Radiation-Exposure Converter

Convert roentgen, coulomb per kilogram, and more — instantly.

Free radiation-exposure converter. Convert roentgen to coulomb per kilogram — the classic X-ray exposure conversion — plus millicoulomb per kilogram and related exposure units. Use the express converter for any unit pair, or open a quick conversion below.

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1 roentgen = 0.000258 coulomb per kilograms

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Hand-picked pairs with dedicated converter pages — open one to convert instantly.

Roentgen → Coulomb per Kilogram

Roentgen to Coulomb per Kilogram

Coulomb per Kilogram → Roentgen

Coulomb per Kilogram to Roentgen

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Pick any unit to open a two-way conversion. Coulomb per kilogram is the SI unit of exposure. Roentgen ↔ coulomb per kilogram is the recognizable legacy pair — 1 R = 0.000258 C/kg.

COULOMB PER KILOGRAM

1 C/kg = 3,875.9689922481 R

coulomb per kilogram (C/kg) → roentgen (R) roentgen (R) → coulomb per kilogram (C/kg)

MILLICOULOMB PER KILOGRAM

1 mC/kg = 0.001 C/kg

millicoulomb per kilogram (mC/kg) → coulomb per kilogram (C/kg) coulomb per kilogram (C/kg) → millicoulomb per kilogram (mC/kg)

MICROCOULOMB PER KILOGRAM

1 µC/kg = 0.000001 C/kg

microcoulomb per kilogram (µC/kg) → coulomb per kilogram (C/kg) coulomb per kilogram (C/kg) → microcoulomb per kilogram (µC/kg)

ROENTGEN

1 R = 0.000258 C/kg

roentgen (R) → coulomb per kilogram (C/kg) coulomb per kilogram (C/kg) → roentgen (R)

TISSUE ROENTGEN

1 R = 0.000258 C/kg

tissue roentgen (R) → coulomb per kilogram (C/kg) coulomb per kilogram (C/kg) → tissue roentgen (R)

PARKER

1 P = 0.000258 C/kg

parker (P) → coulomb per kilogram (C/kg) coulomb per kilogram (C/kg) → parker (P)

REP

1 rep = 0.000258 C/kg

rep → coulomb per kilogram (C/kg) coulomb per kilogram (C/kg) → rep