Milligray is 0.001 gray units.
Milligrays to Centigrays Converter — mGy to cGy
Convert Milligray (mGy) to Centigray (cGy) using the exact conversion factor (1 milligray = 0.1 centigray). See the formula, worked examples, and conversion table.
Milligrays to Centigrays 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.
Centigray is 0.01 gray units.
Result = input x 0.001 / 0.01.
Absorbed Dose units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Milligrays to Centigrays
Milligray and Centigray 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: Milligray is 0.001 gray units, and centigray is 0.01 gray units.
Formula
centigrays = milligrays × 0.1
This factor comes from each unit's defined relationship to the category's base unit: 1 milligray equals 0.001 base units, and 1 centigray equals 0.01 base units, so dividing one by the other gives the direct milligray-to-centigray factor of 0.1.
Simple example
1 mGy × 0.1 = 0.1 cGy
1 milligray = 0.1 centigrays.
Real-world example
10 mGy × 0.1 = 1 cGy
10 milligrays = 1 centigray.
Conversion table
| Milligray (mGy) | Centigray (cGy) |
|---|---|
| 0.001 mGy | 0.0001 cGy |
| 0.01 mGy | 0.001 cGy |
| 0.1 mGy | 0.01 cGy |
| 1 mGy | 0.1 cGy |
| 10 mGy | 1 cGy |
| 100 mGy | 10 cGy |
Reverse conversion: Centigray to Milligray
0.1 cGy × 10 = 1 mGy
0.1 centigrays = 1 milligray.
milligrays = centigrays × 10
For a page dedicated to this direction, see Centigray to Milligray.
Understanding the Milligray (mGy)
Milligray is 0.001 gray units.
Understanding the Centigray (cGy)
Centigray is 0.01 gray units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many centigrays are in 1 milligray?
1 milligray equals 0.1 centigrays, using the exact defined conversion factor rather than an estimate.
How do I convert milligray to centigray?
Multiply the milligray value by 0.1. The converter above does this instantly to whatever precision you set.
How do I convert centigray back to milligray?
Use the reverse factor: 1 centigray equals 10 milligrays. You can also use the swap control in the converter above to flip the direction instantly.
What is a milligray?
Milligray (mGy) is a unit of radiation.
What is a centigray?
Centigray (cGy) is a unit of radiation.
Is the milligray to centigray conversion exact?
Yes. Both milligray and centigray are defined by fixed standards rather than physical artifacts, so the factor of 0.1 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.