Convert Rad to Centigray
Use this free converter to change rad (rad) into centigray (cGy). Rad and centigray both measure radiation (absorbed dose). As a quick reference, 1 rad equals 1 cGy, and 1 cGy equals 1 rad.
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Centigray (cGy)
1
1 rad = 1 cGy
Radiation (Absorbed Dose) conversion table
| Rad | Centigray |
|---|---|
| 0.01 | 0.01 |
| 0.1 | 0.1 |
| 0.5 | 0.5 |
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 5 | 5 |
| 10 | 10 |
| 20 | 20 |
| 25 | 25 |
| 50 | 50 |
| 100 | 100 |
| 1,000 | 1000 |
How to convert Rad to Centigray
Multiply the rad value by 1 to get centigray.
- Enter the number of rad you want to convert.
- The converter instantly shows the equivalent value in centigray.
- Worked example: 15 rad × 1 = 15 cGy.
- Use the swap button to reverse the conversion (centigray to rad).
About these units
Rad (rad)
- Definition
- The rad (radiation absorbed dose) is a non-SI unit of absorbed dose equal to 0.01 gray or 100 ergs per gram.
- History
- Introduced in 1953 by the International Commission on Radiation Units and Measurements; largely superseded by the gray since 1985.
- Current use
- Still encountered in US medical and nuclear-industry documentation alongside cGy; 100 rad = 1 Gy.
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 rad?
There is 1 cGy in 1 rad. To convert, multiply the number of rad by 1.
How do I convert rad to centigray?
Multiply the rad value by 1 to get centigray. For example, 10 rad = 10 cGy.
Is this rad-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 Rad to other radiation (absorbed dose) units
| Unit | 1 Rad equals |
|---|---|
| Gray (Gy) | 0.01 Gy |
| Milligray (mGy) | 10 mGy |
| Centigray (cGy) | 1 cGy |
| Microgray (µGy) | 10000 µGy |