Sievert (Sv)
SI unit of equivalent and effective dose: absorbed dose weighted for its biological effect on the body.
What is a sievert?
- Symbol
- Sv
- Quantity
- Radiation Dose (Equivalent)
- Unit system
- SI
- Definition
- SI unit of equivalent and effective dose: absorbed dose weighted for its biological effect on the body.
- Exact
- Yes, the value is exact by definition
- Source
- SI Brochure, 9th edition (BIPM, 2019)
Common applications
Used in radiation protection to express equivalent and effective dose, mostly through its smaller multiples.
Sievert in other radiation dose (equivalent) units
- 1 Sv = 1000 mSvMillisievert
- 1 Sv = 1000000 µSvMicrosievert
- 1 Sv = 100 remSievert to Rem converter
- 1 Sv = 100000 mremMillirem
Sievert quick reference
| Sievert | Rem | Microsievert | Millirem |
|---|---|---|---|
| 1 Sv | = 100 rem | = 1000000 µSv | = 100000 mrem |
| 10 Sv | = 1000 rem | = 10000000 µSv | = 1000000 mrem |
| 100 Sv | = 10000 rem | = 100000000 µSv | = 10000000 mrem |
| 1000 Sv | = 100000 rem | = 1000000000 µSv | = 100000000 mrem |
Where the sievert fits
The next smaller radiation dose (equivalent) unit is the rem (rem). 1 Sv = 100 rem, and 1 rem = 0.01 Sv.
Frequently asked questions
- How many rem are in one sievert?
- One sievert = 100 rem (rem).
- How many microsieverts are in one sievert?
- One sievert = 1000000 µSv (microsieverts).
- How many millirem are in one sievert?
- One sievert = 100000 mrem (millirem).