Kilogray is 1000 gray units.
Kilograys to Milligrays Converter — kGy to mGy
Convert Kilogray (kGy) to Milligray (mGy) using the exact conversion factor (1 kilogray = 1,000,000 milligray). See the formula, worked examples, and conversion table.
Kilograys 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 1000 / 0.001.
Absorbed Dose units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Kilograys to Milligrays
Kilogray 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: Kilogray is 1000 gray units, and milligray is 0.001 gray units.
Formula
milligrays = kilograys × 1000000
This factor comes from each unit's defined relationship to the category's base unit: 1 kilogray equals 1000 base units, and 1 milligray equals 0.001 base units, so dividing one by the other gives the direct kilogray-to-milligray factor of 1000000.
Simple example
1 kGy × 1000000 = 1,000,000 mGy
1 kilogray = 1,000,000 milligrays.
Real-world example
10 kGy × 1000000 = 10,000,000 mGy
10 kilograys = 10,000,000 milligrays.
Conversion table
| Kilogray (kGy) | Milligray (mGy) |
|---|---|
| 0.001 kGy | 1,000 mGy |
| 0.01 kGy | 10,000 mGy |
| 0.1 kGy | 100,000 mGy |
| 1 kGy | 1,000,000 mGy |
| 10 kGy | 10,000,000 mGy |
| 100 kGy | 100,000,000 mGy |
Reverse conversion: Milligray to Kilogray
1 mGy × 0.000001 = 0.000001 kGy
1 milligray = 0.000001 kilograys.
kilograys = milligrays × 0.000001
For a page dedicated to this direction, see Milligray to Kilogray.
Understanding the Kilogray (kGy)
Kilogray is 1000 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 kilogray?
1 kilogray equals 1,000,000 milligrays, using the exact defined conversion factor rather than an estimate.
How do I convert kilogray to milligray?
Multiply the kilogray value by 1000000. The converter above does this instantly to whatever precision you set.
How do I convert milligray back to kilogray?
Use the reverse factor: 1 milligray equals 0.000001 kilograys. You can also use the swap control in the converter above to flip the direction instantly.
What is a kilogray?
Kilogray (kGy) is a unit of radiation.
What is a milligray?
Milligray (mGy) is a unit of radiation.
Is the kilogray to milligray conversion exact?
Yes. Both kilogray and milligray are defined by fixed standards rather than physical artifacts, so the factor of 1000000 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.