Roentgen to milligray of air kerma
Type a value in R to get it in mGy air instantly.
876mGy air
That's 33× as much exposure as a minute of fluoroscopy, while a lethal whole-body exposure is 4.5× more.
Convert the other way: mGy air to R
What it means
How much exposure is that?
Information only. Medical figures are typical entrance exposures and vary widely with equipment and patient. For dose to people, use gray and sievert.
The math
How to convert R to mGy air
To convert roentgen to milligray of air kerma, multiply by 8.76.
Example: 100 R × 8.76 = 876 mGy air.
In the other direction, 1 mGy air = 0.114155 R.
Every unit
Your exposure in every unit
Tables
R to mGy air conversion table
| R | mGy air |
|---|---|
| 1 R | 8.76 mGy air |
| 5 R | 43.8 mGy air |
| 10 R | 87.6 mGy air |
| 15 R | 131.4 mGy air |
| 25 R | 219 mGy air |
| 50 R | 438 mGy air |
| 100 R | 876 mGy air |
| 250 R | 2,190 mGy air |
| 500 R | 4,380 mGy air |
| 1,000 R | 8,760 mGy air |
| 5,000 R | 43,800 mGy air |
mGy air to R conversion table
| mGy air | R |
|---|---|
| 1 mGy air | 0.114155 R |
| 5 mGy air | 0.570776 R |
| 10 mGy air | 1.14155 R |
| 15 mGy air | 1.71233 R |
| 25 mGy air | 2.85388 R |
| 50 mGy air | 5.70776 R |
| 100 mGy air | 11.4155 R |
| 250 mGy air | 28.5388 R |
| 500 mGy air | 57.0776 R |
| 1,000 mGy air | 114.155 R |
| 5,000 mGy air | 570.776 R |
Quick answers
Quick answers
- How many mGy air is 1 R?
- 1 R is 8.76 mGy air.
- How many mGy air is 10 R?
- 10 R is 87.6 mGy air.
- How many mGy air is 100 R?
- 100 R is 876 mGy air.
The units
About these units
Roentgen (R)
The classic unit of exposure, 2.58 × 10⁻⁴ C/kg.
Milligray of air kerma (mGy air)
How modern X-ray machines report output.
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