Radiation Dose
GytocGy
Convert grays (Gy) to centigrays (cGy).
Factor1 Gy = 100 cGy
Converter
Gy
Accepts numbers or expressions, e.g. 150 + 14.7
Result
cGy
Rendered to 6 significant figures.
Formula
Formula
cGy = Gy × 100
Multiply any value in grays by 100 to obtain the value in centigrays.
Worked example
Convert 1 Gy to cGy.
- 01Start with 1 Gy.
- 02Multiply by the conversion factor: 1 × 100 = 100 cGy.
Result1 Gy = 100 cGy
Conversion table
| Gy | cGy |
|---|---|
| 1 | 100 |
| 2 | 200 |
| 5 | 500 |
| 10 | 1000 |
| 20 | 2000 |
| 50 | 5000 |
| 100 | 10000 |
| 200 | 20000 |
| 500 | 50000 |
| 1000 | 1.0000e+5 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from Gy to cGy?
1 Gy equals 100 cGy. To convert, multiply the value in grays by 100.
How do I convert 1 Gy to cGy?
1 Gy = 100 cGy. For any value, multiply by 100.
How do I convert cGy back to Gy?
Divide by the same factor — or equivalently, multiply by 0.01. So 1 cGy = 0.01 Gy.
When would I need to convert gray to centigray?
Radiation absorbed-dose conversions between Gy and cGy 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).