Millirad (mrad)
A millirad is one thousandth of a rad, 10 micrograys.
Symbol: mrad
Quantity: absorbed dose of ionising radiation
SI relation: 1 mrad = 0.00001 Gy (exact)
Derivation: 1 mrad = 10⁻⁵ Gy = 10 µGy.
Exact: yes, by definition
Typical uses
- Older X-ray dose figures
Convert millirads to other units
| Conversion | 1 mrad equals | Reverse |
|---|---|---|
| millirad to gray | 0.00001 Gy | gray to millirad |
| millirad to milligray | 0.01 mGy | milligray to millirad |
| millirad to rad | 0.001 rad | rad to millirad |
| millirad to microgray | 10 µGy | microgray to millirad |
| millirad to centigray | 0.001 cGy | centigray to millirad |
| millirad to kilogray | 1 × 10⁻⁸ kGy | kilogray to millirad |
Open the Absorbed Radiation Dose Converter to convert any value between all units.
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)".
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). Millirad (mrad). Retrieved October 25, 2026, from https://scientificconverters.com/units/millirad/
IEEE
Scientific Converters, "Millirad (mrad)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/units/millirad/