Convert joule/gram [J/g] to joule/centigram [J/cg] Online | Free radiation-absorbed-dose Converter

Joule per Gram [J/g]: A Measure of Energy Absorbed per Mass

The joule per gram (J/g) is a unit that measures how much energy is absorbed or delivered per gram of material. It expresses energy density on a mass basis, indicating the amount of energy deposited in each gram of a substance.

In radiation physics, the standard unit of absorbed dose is the gray (Gy), defined as 1 joule per kilogram (J/kg). Since 1 gram equals 0.001 kilograms, 1 J/g corresponds to:

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  1 J/g = 1 joule per 0.001 kg = 1,000 J/kg = 1,000 grays (Gy).

  
  

This means that 1 J/g equals an extremely high radiation dose—much higher than doses used in medical or environmental contexts.

While joule per gram is not a common unit for radiation dose measurement, it might be used in specialized fields such as materials science, chemistry, or high-energy physics, where energy deposition in small masses is studied.

In summary, joule per gram quantifies energy absorbed per gram of material, representing a large energy density compared to the standard gray.

Joule per Centigram [J/cg]: A Unit of Energy per Mass

The joule per centigram (J/cg) expresses the amount of energy absorbed or delivered per unit mass, specifically joules of energy per centigram (1 centigram = 0.01 grams). This unit represents energy density on a small mass scale.

To relate it to standard radiation dose units: since 1 gray (Gy) equals 1 joule per kilogram (J/kg), and 1 centigram equals 10⁻⁵ kilograms, then

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  1 J/cg = 1 joule per 0.00001 kg = 100,000 J/kg = 100,000 Gy.

  
  

This means that 1 J/cg corresponds to a very high absorbed radiation dose, much greater than typical doses used in medicine or radiation safety.

J/cg could be useful in very specialized fields where energy deposition is considered over tiny masses, such as microdosimetry, materials science, or radiation effects at microscopic scales.

In general, joule per centigram is a high-precision measure for energy density per small mass, but it’s not commonly used in everyday radiation measurement, where grays or their subunits are preferred.