Convert Gray to Centigray
Convert grays to centigrays by entering a value below.
How to Convert Grays to Centigrays
The gray and centigray are both units of radiation dose. By definition, 1 gray equals exactly 100 centigrays. This means to convert grays to centigrays, you multiply by 100.
Formula
Step-by-Step Example
Convert 5 Gy to centigrays:
We need to convert grays to centigrays
Since 1 Gy = 100 cGy, multiply by 100
5 × 100 = 500
5 Gy = 500 cGy
Gray to Centigray Conversion Table
Quick reference table for common gray to centigray conversions. Click any value for detailed calculation.
| Grays (Gy) | Centigrays (cGy) |
|---|---|
| 1 Gy | 100 cGy |
| 2 Gy | 200 cGy |
| 5 Gy | 500 cGy |
| 10 Gy | 1000 cGy |
| 15 Gy | 1500 cGy |
| 20 Gy | 2000 cGy |
| 25 Gy | 2500 cGy |
| 50 Gy | 5000 cGy |
| 100 Gy | 10000 cGy |
About These Units
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.
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.
Frequently Asked Questions
How do I convert grays to centigrays?
To convert grays to centigrays, multiply the value by 100. For example, 10 Gy = 1000 cGy.
How many centigrays are in 1 gray?
1 gray equals 100 centigrays.
What is the formula for grays to centigrays?
The formula is: cGy = Gy × 100.