Convert Rads to Milligrays (rad to mGy)
1 rad = 10 milligrays (mGy). 1 mGy = 0.1 rad. Example: 15 rad = 15 × 10 = 150 mGy.
Also searched as rads to mGy, rads in mGy, rads into milligrays, rad to mGy, rad in milligrays, rad into milligray, rad to milligray, rad to milligrays converter and how many milligrays in a rad.
1 rad = 10 mGy
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk rad to milligray converter to paste a column from Excel.
How to Convert Rad to Milligray
- 1 rad = 10 mGy
- 1 mGy = 0.1 rad
- Example: convert 15 rad to mGy: 15 rad = 15 × 10 mGy = 150 mGy
Formula
mGy = rad × 10
Derivation from SI units:
- 1 rad = 100 erg/g = 0.01 Gy.
- 1 mGy = 10⁻³ Gy.
- 1 rad = 0.01 Gy ÷ 0.001 Gy per mGy = 10 mGy
Both units are defined exactly, so the factor is exact. Rad definition: rad; Milligray definition: milligray.
Worked examples
- A reading of 0.5 rad converts to 5 mGy.
0.5 rad × 10 = 5 mGy - A value of 5 rad is 50 mGy.
5 rad × 10 = 50 mGy
Rad to Milligray conversion table
| Rads (rad) | Milligrays (mGy) |
|---|---|
| 0.001 rad | 0.01 mGy |
| 0.01 rad | 0.1 mGy |
| 0.1 rad | 1 mGy |
| 0.5 rad | 5 mGy |
| 1 rad | 10 mGy |
| 2 rad | 20 mGy |
| 5 rad | 50 mGy |
| 10 rad | 100 mGy |
| 50 rad | 500 mGy |
| 100 rad | 1000 mGy |
Where it's used
Rads are used for US radiation safety and older literature, while milligrays appear in CT dose index (CTDIvol). Both measure absorbed dose of ionising radiation, so the conversion is a fixed factor.
Rad to other absorbed dose units
| Conversion | 1 rad equals |
|---|---|
| rad to milligray | 10 mGy |
| rad to gray | 0.01 Gy |
| rad to microgray | 10000 µGy |
| rad to centigray | 1 cGy |
| rad to kilogray | 0.00001 kGy |
| rad to millirad | 1000 mrad |
Frequently asked questions
How many milligrays are in 1 rad?
1 rad = 10 mGy.
How do I convert rads to milligrays?
Multiply the value in rad by 10. For example, 15 rad × 10 = 150 mGy.
Is the rad to mGy conversion exact?
Yes. Both units are defined exactly, and 1 rad is exactly 10 mGy.
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "rad (absorbed dose)".
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 4 (becquerel, gray, sievert, lux) and Table 2 (candela).
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Rads to Milligrays (rad to mGy). Retrieved October 25, 2026, from https://scientificconverters.com/absorbed-dose/rads-to-milligrays/
IEEE
Scientific Converters, "Convert Rads to Milligrays (rad to mGy)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/absorbed-dose/rads-to-milligrays/