Kilogray is 1000 gray units.
Kilograys to Gigagrays Converter — kGy to GGy
Convert Kilogray (kGy) to Gigagray (GGy) using the exact conversion factor (1 kilogray = 0.000001 gigagray). See the formula, worked examples, and conversion table.
Kilograys to Gigagrays 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.
Gigagray is 1000000000 gray units.
Result = input x 1000 / 1e+9.
Absorbed Dose units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Kilograys to Gigagrays
Kilogray and Gigagray 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 gigagray is 1000000000 gray units.
Formula
gigagrays = kilograys × 0.000001
This factor comes from each unit's defined relationship to the category's base unit: 1 kilogray equals 1000 base units, and 1 gigagray equals 1000000000 base units, so dividing one by the other gives the direct kilogray-to-gigagray factor of 0.000001.
Simple example
1 kGy × 0.000001 = 0.000001 GGy
1 kilogray = 0.000001 gigagrays.
Real-world example
10 kGy × 0.000001 = 0.00001 GGy
10 kilograys = 0.00001 gigagrays.
Conversion table
| Kilogray (kGy) | Gigagray (GGy) |
|---|---|
| 0.001 kGy | 1e-9 GGy |
| 0.01 kGy | 1e-8 GGy |
| 0.1 kGy | 1e-7 GGy |
| 1 kGy | 0.000001 GGy |
| 10 kGy | 0.00001 GGy |
| 100 kGy | 0.0001 GGy |
Reverse conversion: Gigagray to Kilogray
0.000001 GGy × 1000000 = 1 kGy
0.000001 gigagrays = 1 kilogray.
kilograys = gigagrays × 1000000
For a page dedicated to this direction, see Gigagray to Kilogray.
Understanding the Kilogray (kGy)
Kilogray is 1000 gray units.
Understanding the Gigagray (GGy)
Gigagray is 1000000000 gray units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many gigagrays are in 1 kilogray?
1 kilogray equals 0.000001 gigagrays, using the exact defined conversion factor rather than an estimate.
How do I convert kilogray to gigagray?
Multiply the kilogray value by 0.000001. The converter above does this instantly to whatever precision you set.
How do I convert gigagray back to kilogray?
Use the reverse factor: 1 gigagray equals 1,000,000 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 gigagray?
Gigagray (GGy) is a unit of radiation.
Is the kilogray to gigagray conversion exact?
Yes. Both kilogray and gigagray are defined by fixed standards rather than physical artifacts, so the factor of 0.000001 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.