Convert Roentgen to Kilorad
Type the number of roentgens that you wish to convert to kilorads.
How to Convert Roentgens to Kilorads
The roentgen and kilorad are both units of radiation dose. 1 kilorad equals 1140.2508552 roentgens. This means to convert roentgens to kilorads, you divide by 1140.2508552.
Formula
Step-by-Step Example
Convert 5 R to kilorads:
We need to convert roentgens to kilorads
Since 1 krad = 1140.2508552 R, divide by 1140.2508552
5 ÷ 1140.2508552 = 0.004385
5 R = 0.004385 krad
Roentgen to Kilorad Conversion Table
Quick reference table for common roentgen to kilorad conversions. Click any value for detailed calculation.
| Roentgens (R) | Kilorads (krad) |
|---|---|
| 0.1 R | 8.77e-5 krad |
| 0.5 R | 0.0004385 krad |
| 1 R | 0.000877 krad |
| 2 R | 0.001754 krad |
| 5 R | 0.004385 krad |
| 10 R | 0.00877 krad |
| 25 R | 0.021925 krad |
| 50 R | 0.04385 krad |
| 100 R | 0.0877 krad |
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.
Kilorad (krad)
A kilorad (krad) equals 1,000 rads or 10 grays. Used in electronics radiation hardening: commercial chips fail at 1-10 krad, radiation-hardened: 100+ krad, space-grade: 300+ krad total ionizing dose (TID) tolerance.
Frequently Asked Questions
How do I convert roentgens to kilorads?
To convert roentgens to kilorads, divide the value by 1140.2508552. For example, 10 R = 0.00877 krad.
How many kilorads are in 1 roentgen?
1 roentgen equals 0.000877 kilorads.
What is the formula for roentgens to kilorads?
The formula is: krad = R ÷ 1140.2508552.