Convert Milligrays to Rads (mGy to rad)
1 milligray (mGy) = 0.1 rads (rad). 1 rad = 10 mGy. Example: 15 mGy = 15 × 0.1 = 1.5 rad.
Also searched as milligrays to rad, milligrays in rad, milligrays into rads, mGy to rad, mGy in rads, mGy into rad, milligray to rad, mGy to rads converter and how many rads in a milligray.
1 mGy = 0.1 rad
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk milligray to rad converter to paste a column from Excel.
How to Convert Milligray to Rad
- 1 mGy = 0.1 rad
- 1 rad = 10 mGy
- Example: convert 15 mGy to rad: 15 mGy = 15 × 0.1 rad = 1.5 rad
Formula
rad = mGy ÷ 10
Derivation from SI units:
- 1 mGy = 10⁻³ Gy.
- 1 rad = 100 erg/g = 0.01 Gy.
- 1 mGy = 0.001 Gy ÷ 0.01 Gy per rad = 0.1 rad
Both units are defined exactly, so the factor is exact. Milligray definition: milligray; Rad definition: rad.
Worked examples
- A reading of 0.5 mGy converts to 0.05 rad.
0.5 mGy × 0.1 = 0.05 rad - A value of 5 mGy is 0.5 rad.
5 mGy × 0.1 = 0.5 rad
Milligray to Rad conversion table
| Milligrays (mGy) | Rads (rad) |
|---|---|
| 0.001 mGy | 0.0001 rad |
| 0.01 mGy | 0.001 rad |
| 0.1 mGy | 0.01 rad |
| 0.5 mGy | 0.05 rad |
| 1 mGy | 0.1 rad |
| 2 mGy | 0.2 rad |
| 5 mGy | 0.5 rad |
| 10 mGy | 1 rad |
| 50 mGy | 5 rad |
| 100 mGy | 10 rad |
Where it's used
Milligrays are used for CT dose index (CTDIvol), while rads appear in US radiation safety and older literature. Both measure absorbed dose of ionising radiation, so the conversion is a fixed factor.
Milligray to other absorbed dose units
| Conversion | 1 mGy equals |
|---|---|
| milligray to rad | 0.1 rad |
| milligray to gray | 0.001 Gy |
| milligray to microgray | 1000 µGy |
| milligray to centigray | 0.1 cGy |
| milligray to kilogray | 0.000001 kGy |
| milligray to millirad | 100 mrad |
Frequently asked questions
How many rads are in 1 milligray?
1 mGy = 0.1 rad.
How do I convert milligrays to rads?
Multiply the value in mGy by 0.1, or divide it by 10. For example, 15 mGy × 0.1 = 1.5 rad.
Is the mGy to rad conversion exact?
Yes. Both units are defined exactly, and 1 mGy is exactly 0.1 rad.
Sources
- 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).
- 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)".
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 Milligrays to Rads (mGy to rad). Retrieved October 25, 2026, from https://scientificconverters.com/absorbed-dose/milligrays-to-rads/
IEEE
Scientific Converters, "Convert Milligrays to Rads (mGy to rad)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/absorbed-dose/milligrays-to-rads/