Convert Rad to Roentgen
Convert rads to roentgens by entering a value below.
How to Convert Rads to Roentgens
The rad and roentgen are both units of radiation dose. 1 rad equals 1.1402508552 roentgens. This means to convert rads to roentgens, you multiply by 1.1402508552.
Formula
Step-by-Step Example
Convert 5 rad to roentgens:
We need to convert rads to roentgens
Since 1 rad = 1.1402508552 R, multiply by 1.1402508552
5 × 1.1402508552 = 5.7012542759
5 rad = 5.7012542759 R
Rad to Roentgen Conversion Table
Quick reference table for common rad to roentgen conversions. Click any value for detailed calculation.
| Rads (rad) | Roentgens (R) |
|---|---|
| 1 rad | 1.1402508552 R |
| 2 rad | 2.2805017104 R |
| 5 rad | 5.7012542759 R |
| 10 rad | 11.402508552 R |
| 15 rad | 17.103762828 R |
| 20 rad | 22.805017104 R |
| 25 rad | 28.50627138 R |
| 50 rad | 57.012542759 R |
| 100 rad | 114.02508552 R |
About These Units
Rad (rad)
The rad (Radiation Absorbed Dose) is the traditional unit of absorbed dose. One gray = 100 rads exactly. One rad = 100 ergs/gram = 0.01 J/kg. Still used in US medical and nuclear industries. One rad = one centigray = one rem for gamma/X-rays.
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.
Frequently Asked Questions
How do I convert rads to roentgens?
To convert rads to roentgens, multiply the value by 1.1402508552. For example, 10 rad = 11.402508552 R.
How many roentgens are in 1 rad?
1 rad equals 1.1402508552 roentgens.
What is the formula for rads to roentgens?
The formula is: R = rad × 1.1402508552.