Convert Centigrays to Kilograys (cGy to kGy)
1 centigray (cGy) = 0.00001 kilograys (kGy). 1 kGy = 100000 cGy. Example: 15 cGy = 15 × 0.00001 = 0.00015 kGy.
Also searched as centigrays to kGy, centigrays in kGy, centigrays into kilograys, cGy to kGy, cGy in kilograys, cGy into kilogray, centigray to kilogray, cGy to kilograys converter and how many kilograys in a centigray.
1 cGy = 0.00001 kGy
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk centigray to kilogray converter to paste a column from Excel.
How to Convert Centigray to Kilogray
- 1 cGy = 0.00001 kGy
- 1 kGy = 100000 cGy
- Example: convert 15 cGy to kGy: 15 cGy = 15 × 0.00001 kGy = 0.00015 kGy
Formula
kGy = cGy ÷ 100000
Derivation from SI units:
- 1 cGy = 0.01 Gy = 1 rad.
- 1 kGy = 10³ Gy.
- 1 cGy = 0.01 Gy ÷ 1000 Gy per kGy = 0.00001 kGy
Both units are defined exactly, so the factor is exact. Centigray definition: centigray; Kilogray definition: kilogray.
Worked examples
- A reading of 100 cGy converts to 0.001 kGy.
100 cGy × 0.00001 = 0.001 kGy - A value of 500 cGy is 0.005 kGy.
500 cGy × 0.00001 = 0.005 kGy
Centigray to Kilogray conversion table
| Centigrays (cGy) | Kilograys (kGy) |
|---|---|
| 1 cGy | 0.00001 kGy |
| 10 cGy | 0.0001 kGy |
| 50 cGy | 0.0005 kGy |
| 100 cGy | 0.001 kGy |
| 180 cGy | 0.0018 kGy |
| 200 cGy | 0.002 kGy |
| 500 cGy | 0.005 kGy |
| 1000 cGy | 0.01 kGy |
| 5000 cGy | 0.05 kGy |
| 7000 cGy | 0.07 kGy |
Where it's used
Centigrays are used for radiotherapy plans (e.g. 200 cGy per fraction), while kilograys appear in sterilisation of medical devices (25 kGy). Both measure absorbed dose of ionising radiation, so the conversion is a fixed factor.
Centigray to other absorbed dose units
| Conversion | 1 cGy equals |
|---|---|
| centigray to kilogray | 0.00001 kGy |
| centigray to gray | 0.01 Gy |
| centigray to milligray | 10 mGy |
| centigray to rad | 1 rad |
| centigray to microgray | 10000 µGy |
| centigray to millirad | 1000 mrad |
Frequently asked questions
How many kilograys are in 1 centigray?
1 cGy = 0.00001 kGy.
How do I convert centigrays to kilograys?
Multiply the value in cGy by 0.00001, or divide it by 100000. For example, 15 cGy × 0.00001 = 0.00015 kGy.
Is the cGy to kGy conversion exact?
Yes. Both units are defined exactly, and 1 cGy is exactly 0.00001 kGy.
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 4 (becquerel, gray, sievert, lux) and Table 2 (candela).
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Centigrays to Kilograys (cGy to kGy). Retrieved October 25, 2026, from https://scientificconverters.com/absorbed-dose/centigrays-to-kilograys/
IEEE
Scientific Converters, "Convert Centigrays to Kilograys (cGy to kGy)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/absorbed-dose/centigrays-to-kilograys/