Convert Gray to Centigray
Use this free converter to change gray (Gy) into centigray (cGy). Gray and centigray both measure radiation (absorbed dose). As a quick reference, 1 Gy equals 100 cGy, and 1 cGy equals 0.01 Gy.
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Centigray (cGy)
100
1 Gy = 100 cGy
Radiation (Absorbed Dose) conversion table
| Gray | Centigray |
|---|---|
| 0.01 | 1 |
| 0.1 | 10 |
| 0.5 | 50 |
| 1 | 100 |
| 2 | 200 |
| 3 | 300 |
| 5 | 500 |
| 10 | 1000 |
| 20 | 2000 |
| 25 | 2500 |
| 50 | 5000 |
| 100 | 10000 |
| 1,000 | 100000 |
How to convert Gray to Centigray
Multiply the gray value by 100 to get centigray.
- Enter the number of gray you want to convert.
- The converter instantly shows the equivalent value in centigray.
- Worked example: 15 Gy × 100 = 1500 cGy.
- Use the swap button to reverse the conversion (centigray to gray).
About these units
Gray (Gy)
- Definition
- The gray (Gy) is the SI unit of absorbed radiation dose, equal to one joule of energy deposited per kilogram of matter.
- History
- Named after British radiobiologist Louis Harold Gray and adopted by the CGPM in 1975, replacing the older rad.
- Current use
- Grays describe doses in radiation therapy, nuclear accidents, and radiobiology research.
Centigray (cGy)
- Definition
- A centigray (cGy) is one hundredth of a gray, numerically equal to one rad.
- History
- It was introduced to provide continuity with the older rad unit.
- Current use
- Radiation oncologists commonly prescribe doses in cGy because it matches the familiar rad scale.
Frequently asked questions
How many centigray are in a gray?
There are 100 cGy in 1 Gy. To convert, multiply the number of gray by 100.
How do I convert gray to centigray?
Multiply the gray value by 100 to get centigray. For example, 10 Gy = 1000 cGy.
Is this gray-to-centigray converter free?
Yes. This converter is completely free, runs entirely in your browser, and requires no sign-up. Your inputs never leave your device.
Convert Gray to other radiation (absorbed dose) units
| Unit | 1 Gray equals |
|---|---|
| Milligray (mGy) | 1000 mGy |
| Centigray (cGy) | 100 cGy |
| Microgray (µGy) | 1000000 µGy |
| Rad (rad) | 100 rad |