Category · 2 units

Radiation exposure

Radiation exposure converter - convert between coulombs per kilogram and roentgens. 1 R = 2.58×10⁻⁴ C/kg.

Active unit

coulombs per kilogram · ≈ 100 C/kg (base)

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1 result
  • C/kgcoulomb per kilogram100
How we calculated this
Target:
Formula
R = C/kg × 3,875.968992
Calculation
100 × 3,875.968992 = 387,596.899225
Factor
× 3,875.968992

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Related articles

An emerald ionization chamber with drifting charges and the outline of a hand X-rayed by radiation, against a cosmic nebula in violet and magenta
Radiation exposure

The Roentgen — a Unit Woven From Air

Röntgen saw the bones of his wife's hand straight through her skin, yet no one could measure the force that did it. The first radiologists tamed the invisible with ordinary air — and so the roentgen was born, a unit with the "ugly" number 2.58×10⁻⁴ that ruled dosimetry for half a century.

13 min

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