Kilogray is 1000 gray units.
Kilograys to Micrograys Converter — kGy to uGy
Convert Kilogray (kGy) to Microgray (uGy) using the exact conversion factor (1 kilogray = 1,000,000,000 microgray). See the formula, worked examples, and conversion table.
Kilograys to Micrograys 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.
Microgray is 0.000001 gray units.
Result = input x 1000 / 1e-6.
Absorbed Dose units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Kilograys to Micrograys
Kilogray and Microgray 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 microgray is 0.000001 gray units.
Formula
micrograys = kilograys × 1000000000
This factor comes from each unit's defined relationship to the category's base unit: 1 kilogray equals 1000 base units, and 1 microgray equals 0.000001 base units, so dividing one by the other gives the direct kilogray-to-microgray factor of 1000000000.
Simple example
1 kGy × 1000000000 = 1,000,000,000 uGy
1 kilogray = 1,000,000,000 micrograys.
Real-world example
10 kGy × 1000000000 = 10,000,000,000 uGy
10 kilograys = 10,000,000,000 micrograys.
Conversion table
| Kilogray (kGy) | Microgray (uGy) |
|---|---|
| 0.001 kGy | 1,000,000 uGy |
| 0.01 kGy | 10,000,000 uGy |
| 0.1 kGy | 100,000,000 uGy |
| 1 kGy | 1,000,000,000 uGy |
| 10 kGy | 10,000,000,000 uGy |
| 100 kGy | 100,000,000,000 uGy |
Reverse conversion: Microgray to Kilogray
1 uGy × 1e-9 = 1e-9 kGy
1 microgray = 1e-9 kilograys.
kilograys = micrograys × 1e-9
For a page dedicated to this direction, see Microgray to Kilogray.
Understanding the Kilogray (kGy)
Kilogray is 1000 gray units.
Understanding the Microgray (uGy)
Microgray is 0.000001 gray units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many micrograys are in 1 kilogray?
1 kilogray equals 1,000,000,000 micrograys, using the exact defined conversion factor rather than an estimate.
How do I convert kilogray to microgray?
Multiply the kilogray value by 1000000000. The converter above does this instantly to whatever precision you set.
How do I convert microgray back to kilogray?
Use the reverse factor: 1 microgray equals 1e-9 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 microgray?
Microgray (uGy) is a unit of radiation.
Is the kilogray to microgray conversion exact?
Yes. Both kilogray and microgray are defined by fixed standards rather than physical artifacts, so the factor of 1000000000 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.