Centigray is 0.01 gray units.
Centigrays to Milligrays Converter — cGy to mGy
Convert Centigray (cGy) to Milligray (mGy) using the exact conversion factor (1 centigray = 10 milligray). See the formula, worked examples, and conversion table.
Centigrays to Milligrays converter
Converter
Radiation Converter
Convert radioactivity, absorbed dose, and equivalent dose units by compatible radiation family.
Context values
Some unit families need one extra value for a physically accurate result.
Milligray is 0.001 gray units.
Result = input x 0.01 / 0.001.
Absorbed Dose units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Centigrays to Milligrays
Centigray and Milligray both belong to the radiation-measurement family, though radiation quantities fall into genuinely distinct categories: absorbed dose (gray, rad) measures energy deposited in matter, equivalent dose (sievert, rem) weights that for biological harm, and activity (becquerel, curie) measures how often a radioactive source decays — this page only converts between units of the same kind. Specifically: Centigray is 0.01 gray units, and milligray is 0.001 gray units.
Formula
milligrays = centigrays × 10
This factor comes from each unit's defined relationship to the category's base unit: 1 centigray equals 0.01 base units, and 1 milligray equals 0.001 base units, so dividing one by the other gives the direct centigray-to-milligray factor of 10.
Simple example
1 cGy × 10 = 10 mGy
1 centigray = 10 milligrays.
Real-world example
10 cGy × 10 = 100 mGy
10 centigrays = 100 milligrays.
Conversion table
| Centigray (cGy) | Milligray (mGy) |
|---|---|
| 0.001 cGy | 0.01 mGy |
| 0.01 cGy | 0.1 mGy |
| 0.1 cGy | 1 mGy |
| 1 cGy | 10 mGy |
| 10 cGy | 100 mGy |
| 100 cGy | 1,000 mGy |
Reverse conversion: Milligray to Centigray
10 mGy × 0.1 = 1 cGy
10 milligrays = 1 centigray.
centigrays = milligrays × 0.1
For a page dedicated to this direction, see Milligray to Centigray.
Understanding the Centigray (cGy)
Centigray is 0.01 gray units.
Understanding the Milligray (mGy)
Milligray is 0.001 gray units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many milligrays are in 1 centigray?
1 centigray equals 10 milligrays, using the exact defined conversion factor rather than an estimate.
How do I convert centigray to milligray?
Multiply the centigray value by 10. The converter above does this instantly to whatever precision you set.
How do I convert milligray back to centigray?
Use the reverse factor: 1 milligray equals 0.1 centigrays. You can also use the swap control in the converter above to flip the direction instantly.
What is a centigray?
Centigray (cGy) is a unit of radiation.
What is a milligray?
Milligray (mGy) is a unit of radiation.
Is the centigray to milligray conversion exact?
Yes. Both centigray and milligray are defined by fixed standards rather than physical artifacts, so the factor of 10 used above is exact to as many digits as you choose to display.
What's the difference between absorbed dose, equivalent dose, and activity?
Absorbed dose (gray, rad) measures the energy radiation deposits in matter. Equivalent dose (sievert, rem) adjusts that figure for how harmful different types of radiation are to biological tissue. Activity (becquerel, curie) measures how often a radioactive source decays, independent of how much dose a person actually receives from it.