Convert Milligray to Gray
Enter the number of milligrays that you want to convert to grays.
How to Convert Milligrays to Grays
The milligray and gray are both units of radiation dose. By definition, 1 gray equals exactly 1000 milligrays. This means to convert milligrays to grays, you divide by 1000.
Formula
Step-by-Step Example
Convert 5 mGy to grays:
We need to convert milligrays to grays
Since 1 Gy = 1000 mGy, divide by 1000
5 ÷ 1000 = 0.005
5 mGy = 0.005 Gy
Milligray to Gray Conversion Table
Quick reference table for common milligray to gray conversions. Click any value for detailed calculation.
| Milligrays (mGy) | Grays (Gy) |
|---|---|
| 0.1 mGy | 0.0001 Gy |
| 0.5 mGy | 0.0005 Gy |
| 1 mGy | 0.001 Gy |
| 2 mGy | 0.002 Gy |
| 5 mGy | 0.005 Gy |
| 10 mGy | 0.01 Gy |
| 25 mGy | 0.025 Gy |
| 50 mGy | 0.05 Gy |
| 100 mGy | 0.1 Gy |
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.
Gray (Gy)
The gray (Gy) is the SI unit of absorbed dose: energy deposited per unit mass (1 Gy = 1 J/kg). Named after Louis Harold Gray. For gamma/X-rays and beta particles, 1 Gy ≈ 1 Sv (quality factor Q=1). Radiation therapy total dose: 40-80 Gy.
Frequently Asked Questions
How do I convert milligrays to grays?
To convert milligrays to grays, divide the value by 1000. For example, 10 mGy = 0.01 Gy.
How many grays are in 1 milligray?
1 milligray equals 0.001 grays.
What is the formula for milligrays to grays?
The formula is: Gy = mGy ÷ 1000.