Convert Roentgen to Microgray
Enter the number of roentgens that you want to convert to micrograys.
How to Convert Roentgens to Micrograys
The roentgen and microgray are both units of radiation dose. By definition, 1 roentgen equals exactly 8770 micrograys. This means to convert roentgens to micrograys, you multiply by 8770.
Formula
Step-by-Step Example
Convert 5 R to micrograys:
We need to convert roentgens to micrograys
Since 1 R = 8770 μGy, multiply by 8770
5 × 8770 = 43850
5 R = 43850 μGy
Roentgen to Microgray Conversion Table
Quick reference table for common roentgen to microgray conversions. Click any value for detailed calculation.
| Roentgens (R) | Micrograys (μGy) |
|---|---|
| 0.1 R | 877 μGy |
| 0.5 R | 4385 μGy |
| 1 R | 8770 μGy |
| 2 R | 17540 μGy |
| 5 R | 43850 μGy |
| 10 R | 87700 μGy |
| 25 R | 219250 μGy |
| 50 R | 438500 μGy |
| 100 R | 877000 μGy |
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.
Microgray (μGy)
A microgray (μGy) equals 0.001 mGy or 0.1 mrad. Chest X-ray: ~20 μGy. Panoramic dental X-ray: 10-20 μGy. Used for specifying doses from diagnostic imaging with minimal exposure. One gray = one million micrograys.
Frequently Asked Questions
How do I convert roentgens to micrograys?
To convert roentgens to micrograys, multiply the value by 8770. For example, 10 R = 87700 μGy.
How many micrograys are in 1 roentgen?
1 roentgen equals 8770 micrograys.
What is the formula for roentgens to micrograys?
The formula is: μGy = R × 8770.