Formula
Gy to kGy conversion formula
Use this relationship for a direct conversion:
kGy = Gy x 0.001
Worked example
2 Gy = 0.002 kGy.
This converter is for absorbed dose only; it does not calculate biological equivalent dose.
Absorbed Radiation Dose conversion
Convert Gray to Kilogray
1 gray (Gy) equals 0.001 kilogray (kGy). Enter any value below to convert from Gy to kGy.
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1 Gy = 0.001 kGy
All Absorbed dose units
From 1 Gy| Unit | Value |
|---|---|
| Nanogray nGy | 999,999,999.9999998808 |
| Microgray μGy | 1,000,000 |
| Milligray mGy | 1,000 |
| Gray Gy | 1 |
| Kilogray kGy | 0.001 |
| Rad rad | 100 |
Recent conversions
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Quick reference
Gray to Kilogray table
| Gray (Gy) | Kilogray (kGy) |
|---|---|
| 0.01 | 0.00001 |
| 0.1 | 0.0001 |
| 1 | 0.001 |
| 2 | 0.002 |
| 5 | 0.005 |
| 10 | 0.01 |
| 25 | 0.025 |
| 50 | 0.05 |
| 100 | 0.1 |
| 1,000 | 1 |
From unit
About the gray
One joule of absorbed energy per kilogram.
Symbol: Gy
To unit
About the kilogray
One thousand gray.
Symbol: kGy
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Related conversions
Source
Conversion standard
Definitions are checked against BIPM SI Brochure: gray. Calculations use full internal precision before display rounding.
View the complete absorbed radiation dose converterQuestions
Gy to kGy FAQ
How do you convert gray to kilogray?
Use the formula kGy = Gy x 0.001. 1 gray (Gy) equals 0.001 kilogray (kGy).
Is the Gy to kGy conversion exact?
Both unit definitions use exact factors. Only the displayed decimal may be rounded.