Microsievert (µSv)
A microsievert is one millionth of a sievert. Dose-rate meters read µSv/h; background is roughly 0.1–0.3 µSv/h and a transatlantic flight about 40 µSv.
Symbol: µSv (ASCII: uSv)
Quantity: equivalent and effective radiation dose
SI relation: 1 µSv = 0.000001 Sv (exact)
Derivation: 1 µSv = 10⁻⁶ Sv.
Exact: yes, by definition
Typical uses
- Geiger counter and dosimeter readings (µSv/h)
- Dental X-rays (about 5 µSv)
- Flight doses
Convert microsieverts to other units
| Conversion | 1 µSv equals | Reverse |
|---|---|---|
| microsievert to sievert | 0.000001 Sv | sievert to microsievert |
| microsievert to millisievert | 0.001 mSv | millisievert to microsievert |
| microsievert to rem | 0.0001 rem | rem to microsievert |
| microsievert to millirem | 0.1 mrem | millirem to microsievert |
| microsievert to nanosievert | 1000 nSv | nanosievert to microsievert |
Open the Radiation Dose Converter (Sv, rem) 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). Microsievert (µSv). Retrieved October 25, 2026, from https://scientificconverters.com/units/microsievert/
IEEE
Scientific Converters, "Microsievert (µSv)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/units/microsievert/