Convert Roentgen to Kilogray
Input the number of roentgens you want to convert to kilograys.
How to Convert Roentgens to Kilograys
The roentgen and kilogray are both units of radiation dose. 1 kilogray equals 114025.08552 roentgens. This means to convert roentgens to kilograys, you divide by 114025.08552.
Formula
Step-by-Step Example
Convert 5 R to kilograys:
We need to convert roentgens to kilograys
Since 1 kGy = 114025.08552 R, divide by 114025.08552
5 ÷ 114025.08552 = 4.385e-5
5 R = 4.385e-5 kGy
Roentgen to Kilogray Conversion Table
Quick reference table for common roentgen to kilogray conversions. Click any value for detailed calculation.
| Roentgens (R) | Kilograys (kGy) |
|---|---|
| 0.1 R | 8.77e-7 kGy |
| 0.5 R | 4.385e-6 kGy |
| 1 R | 8.77e-6 kGy |
| 2 R | 1.754e-5 kGy |
| 5 R | 4.385e-5 kGy |
| 10 R | 8.77e-5 kGy |
| 25 R | 0.00021925 kGy |
| 50 R | 0.0004385 kGy |
| 100 R | 0.000877 kGy |
About These Units
Roentgen (R)
The roentgen (R) measures ionization produced by X-rays or gamma rays in air. One roentgen produces 2.58×10⁻⁴ C/kg of ionization. Approximately: 1 R ≈ 8.77 mGy or 0.877 rad in soft tissue. Named after Wilhelm Röntgen, discoverer of X-rays.
Kilogray (kGy)
A kilogray (kGy) equals 1,000 grays. Used for industrial irradiation: food preservation 1-10 kGy, medical device sterilization 25-50 kGy, cross-linking polymers 50-200 kGy. Far above any biological survivability.
Frequently Asked Questions
How do I convert roentgens to kilograys?
To convert roentgens to kilograys, divide the value by 114025.08552. For example, 10 R = 8.77e-5 kGy.
How many kilograys are in 1 roentgen?
1 roentgen equals 8.77e-6 kilograys.
What is the formula for roentgens to kilograys?
The formula is: kGy = R ÷ 114025.08552.