Microgray (µGy)
A microgray is one millionth of a gray: the scale of dental X-rays and air kerma from background radiation.
Symbol: µGy (ASCII: uGy)
Quantity: absorbed dose of ionising radiation
SI relation: 1 µGy = 0.000001 Gy (exact)
Derivation: 1 µGy = 10⁻⁶ Gy.
Exact: yes, by definition
Typical uses
- Dental and chest X-ray air kerma
- Environmental dose rates (µGy/h)
Convert micrograys to other units
| Conversion | 1 µGy equals | Reverse |
|---|---|---|
| microgray to gray | 0.000001 Gy | gray to microgray |
| microgray to milligray | 0.001 mGy | milligray to microgray |
| microgray to rad | 0.0001 rad | rad to microgray |
| microgray to centigray | 0.0001 cGy | centigray to microgray |
| microgray to kilogray | 1 × 10⁻⁹ kGy | kilogray to microgray |
| microgray to millirad | 0.1 mrad | millirad to microgray |
Open the Absorbed Radiation Dose Converter to convert any value between all units.
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).
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). Microgray (µGy). Retrieved October 25, 2026, from https://scientificconverters.com/units/microgray/
IEEE
Scientific Converters, "Microgray (µGy)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/units/microgray/