Gray to Centigray Converter
1 gray is exactly 100 centigrays. Convert grays (Gy) to centigrays (cGy) below: type a value and the result updates as you type.
Gy to cGy calculator
Result
Gray to Centigray conversion
1 Gy = 100 cGyone gray in centigrays
1 cGy = 0.01 Gyone centigray in grays
Gray (Gy): SI unit of absorbed dose: one joule of radiation energy absorbed per kilogram of matter.
Centigray (cGy): One hundredth of a gray, the same as one rad. Used in radiotherapy planning.
Source:SI Brochure, 9th edition (BIPM, 2019)
How to convert grays to centigrays
To convert grays to centigrays, multiply the number of grays by 100.
Formula
cGy = Gy × 100
Examples
- 5 Gy = 5 × 100 = 500 cGy
- 25 Gy = 25 × 100 = 2500 cGy
- 100 Gy = 100 × 100 = 10000 cGy
Gray to Centigray conversion table
| Gray (Gy) | Centigray (cGy) |
|---|---|
| 0.1 Gy | 10 cGy |
| 0.5 Gy | 50 cGy |
| 1 Gy | 100 cGy |
| 2 Gy | 200 cGy |
| 3 Gy | 300 cGy |
| 5 Gy | 500 cGy |
| 10 Gy | 1000 cGy |
| 20 Gy | 2000 cGy |
| 25 Gy | 2500 cGy |
| 50 Gy | 5000 cGy |
| 100 Gy | 10000 cGy |
| 250 Gy | 25000 cGy |
| 500 Gy | 50000 cGy |
| 1000 Gy | 100000 cGy |
Values rounded to 10 significant digits where needed.
Frequently asked questions
- How many centigrays are in one gray?
- One gray is exactly 100 centigrays.
- How do I convert centigrays to grays?
- To convert centigrays to grays, multiply the number of centigrays by 0.01. The formula is Gy = cGy × 0.01.
- Is this conversion exact?
- Yes. Both units have exact definitions and the factor 100 is exact. Displayed results are only rounded when they have many decimal places.
- Which is larger, a gray or a centigray?
- A gray is 100 times larger than a centigray. In other words, a centigray is exactly 1/100 of a gray.