Megagray is 1000000 gray units.
Megagrays to Kilograys Converter — MGy to kGy
Convert Megagray (MGy) to Kilogray (kGy) using the exact conversion factor (1 megagray = 1,000 kilogray). See the formula, worked examples, and conversion table.
Megagrays to Kilograys 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.
Kilogray is 1000 gray units.
Result = input x 1e+6 / 1000.
Absorbed Dose units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Megagrays to Kilograys
Megagray and Kilogray 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: Megagray is 1000000 gray units, and kilogray is 1000 gray units.
Formula
kilograys = megagrays × 1000
This factor comes from each unit's defined relationship to the category's base unit: 1 megagray equals 1000000 base units, and 1 kilogray equals 1000 base units, so dividing one by the other gives the direct megagray-to-kilogray factor of 1000.
Simple example
1 MGy × 1000 = 1,000 kGy
1 megagray = 1,000 kilograys.
Real-world example
10 MGy × 1000 = 10,000 kGy
10 megagrays = 10,000 kilograys.
Conversion table
| Megagray (MGy) | Kilogray (kGy) |
|---|---|
| 0.001 MGy | 1 kGy |
| 0.01 MGy | 10 kGy |
| 0.1 MGy | 100 kGy |
| 1 MGy | 1,000 kGy |
| 10 MGy | 10,000 kGy |
| 100 MGy | 100,000 kGy |
Reverse conversion: Kilogray to Megagray
1 kGy × 0.001 = 0.001 MGy
1 kilogray = 0.001 megagrays.
megagrays = kilograys × 0.001
For a page dedicated to this direction, see Kilogray to Megagray.
Understanding the Megagray (MGy)
Megagray is 1000000 gray units.
Understanding the Kilogray (kGy)
Kilogray is 1000 gray units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many kilograys are in 1 megagray?
1 megagray equals 1,000 kilograys, using the exact defined conversion factor rather than an estimate.
How do I convert megagray to kilogray?
Multiply the megagray value by 1000. The converter above does this instantly to whatever precision you set.
How do I convert kilogray back to megagray?
Use the reverse factor: 1 kilogray equals 0.001 megagrays. You can also use the swap control in the converter above to flip the direction instantly.
What is a megagray?
Megagray (MGy) is a unit of radiation.
What is a kilogray?
Kilogray (kGy) is a unit of radiation.
Is the megagray to kilogray conversion exact?
Yes. Both megagray and kilogray are defined by fixed standards rather than physical artifacts, so the factor of 1000 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.