Convert Roentgen to Sievert
Enter the number of roentgens that you want to convert to sieverts.
How to Convert Roentgens to Sieverts
The roentgen and sievert are both units of radiation dose. 1 sievert equals 114.02508552 roentgens. This means to convert roentgens to sieverts, you divide by 114.02508552.
Formula
Step-by-Step Example
Convert 5 R to sieverts:
We need to convert roentgens to sieverts
Since 1 Sv = 114.02508552 R, divide by 114.02508552
5 ÷ 114.02508552 = 0.04385
5 R = 0.04385 Sv
Roentgen to Sievert Conversion Table
Quick reference table for common roentgen to sievert conversions. Click any value for detailed calculation.
| Roentgens (R) | Sieverts (Sv) |
|---|---|
| 0.1 R | 0.000877 Sv |
| 0.5 R | 0.004385 Sv |
| 1 R | 0.00877 Sv |
| 2 R | 0.01754 Sv |
| 5 R | 0.04385 Sv |
| 10 R | 0.0877 Sv |
| 25 R | 0.21925 Sv |
| 50 R | 0.4385 Sv |
| 100 R | 0.877 Sv |
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.
Sievert (Sv)
The sievert (Sv) is the SI unit of equivalent dose, measuring biological effect of radiation exposure. Accounts for radiation type via quality factors. 1 Sv = significant health risk, 4-5 Sv = 50% fatality (LD50). Acute exposure above 0.5 Sv causes radiation sickness.
Frequently Asked Questions
How do I convert roentgens to sieverts?
To convert roentgens to sieverts, divide the value by 114.02508552. For example, 10 R = 0.0877 Sv.
How many sieverts are in 1 roentgen?
1 roentgen equals 0.00877 sieverts.
What is the formula for roentgens to sieverts?
The formula is: Sv = R ÷ 114.02508552.