Radiation Dose
GytokGy
Convert grays (Gy) to kilograys (kGy).
Factor1 Gy = 0.001 kGy
Converter
Gy
Accepts numbers or expressions, e.g. 150 + 14.7
Result
kGy
Rendered to 6 significant figures.
Formula
Formula
kGy = Gy × 0.001
Multiply any value in grays by 0.001 to obtain the value in kilograys.
Worked example
Convert 10000 Gy to kGy.
- 01Start with 10000 Gy.
- 02Multiply by the conversion factor: 10000 × 0.001 = 10 kGy.
Result10000 Gy = 10 kGy
Conversion table
| Gy | kGy |
|---|---|
| 1 | 0.001 |
| 2 | 0.002 |
| 5 | 0.005 |
| 10 | 0.01 |
| 20 | 0.02 |
| 50 | 0.05 |
| 100 | 0.1 |
| 200 | 0.2 |
| 500 | 0.5 |
| 1000 | 1 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from Gy to kGy?
1 Gy equals 0.001 kGy. To convert, multiply the value in grays by 0.001.
How do I convert 1 Gy to kGy?
1 Gy = 0.001 kGy. For any value, multiply by 0.001.
How do I convert kGy back to Gy?
Divide by the same factor — or equivalently, multiply by 1000. So 1 kGy = 1000 Gy.
When would I need to convert gray to kilogray?
Radiation absorbed-dose conversions between Gy and kGy are used in radiological protection, medical physics, and nuclear-industry health physics. Gray (Gy) is the SI standard; rad remains common in older US health-physics documentation (1 Gy = 100 rad).
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).