Convert Milligray to Sievert
Enter the number of milligrays that you want to convert to sieverts.
How to Convert Milligrays to Sieverts
The milligray and sievert are both units of radiation dose. By definition, 1 sievert equals exactly 1000 milligrays. This means to convert milligrays to sieverts, you divide by 1000.
Formula
Step-by-Step Example
Convert 5 mGy to sieverts:
We need to convert milligrays to sieverts
Since 1 Sv = 1000 mGy, divide by 1000
5 ÷ 1000 = 0.005
5 mGy = 0.005 Sv
Milligray to Sievert Conversion Table
Quick reference table for common milligray to sievert conversions. Click any value for detailed calculation.
| Milligrays (mGy) | Sieverts (Sv) |
|---|---|
| 0.1 mGy | 0.0001 Sv |
| 0.5 mGy | 0.0005 Sv |
| 1 mGy | 0.001 Sv |
| 2 mGy | 0.002 Sv |
| 5 mGy | 0.005 Sv |
| 10 mGy | 0.01 Sv |
| 25 mGy | 0.025 Sv |
| 50 mGy | 0.05 Sv |
| 100 mGy | 0.1 Sv |
About These Units
Milligray (mGy)
A milligray (mGy) equals 0.001 gray or 0.1 rad. Common medical imaging doses: CT scan 10-30 mGy, mammogram 2-3 mGy, fluoroscopy 20-50 mGy. Diagnostic reference levels often specified in mGy.
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 milligrays to sieverts?
To convert milligrays to sieverts, divide the value by 1000. For example, 10 mGy = 0.01 Sv.
How many sieverts are in 1 milligray?
1 milligray equals 0.001 sieverts.
What is the formula for milligrays to sieverts?
The formula is: Sv = mGy ÷ 1000.