Convert Centigray to Gray
Type the number of centigrays that you wish to convert to grays.
How to Convert Centigrays to Grays
The centigray and gray are both units of radiation dose. By definition, 1 gray equals exactly 100 centigrays. This means to convert centigrays to grays, you divide by 100.
Formula
Step-by-Step Example
Convert 5 cGy to grays:
We need to convert centigrays to grays
Since 1 Gy = 100 cGy, divide by 100
5 ÷ 100 = 0.05
5 cGy = 0.05 Gy
Centigray to Gray Conversion Table
Quick reference table for common centigray to gray conversions. Click any value for detailed calculation.
| Centigrays (cGy) | Grays (Gy) |
|---|---|
| 1 cGy | 0.01 Gy |
| 2 cGy | 0.02 Gy |
| 5 cGy | 0.05 Gy |
| 10 cGy | 0.1 Gy |
| 15 cGy | 0.15 Gy |
| 20 cGy | 0.2 Gy |
| 25 cGy | 0.25 Gy |
| 50 cGy | 0.5 Gy |
| 100 cGy | 1 Gy |
About These Units
Centigray (cGy)
A centigray (cGy) equals 0.01 gray and exactly equals 1 rad. Standard unit in radiation oncology. Typical fraction: 180-200 cGy/day. Total treatment: 4,000-8,000 cGy. Prostate: 7,000-8,000 cGy. Breast: 5,000-6,000 cGy.
Gray (Gy)
The gray (Gy) is the SI unit of absorbed dose: energy deposited per unit mass (1 Gy = 1 J/kg). Named after Louis Harold Gray. For gamma/X-rays and beta particles, 1 Gy ≈ 1 Sv (quality factor Q=1). Radiation therapy total dose: 40-80 Gy.
Frequently Asked Questions
How do I convert centigrays to grays?
To convert centigrays to grays, divide the value by 100. For example, 10 cGy = 0.1 Gy.
How many grays are in 1 centigray?
1 centigray equals 0.01 grays.
What is the formula for centigrays to grays?
The formula is: Gy = cGy ÷ 100.