Rem (rem)
Older unit of dose equivalent, still used in the US: exactly 0.01 Sv.
What is a rem?
- Symbol
- rem
- Quantity
- Radiation Dose (Equivalent)
- Unit system
- other
- Definition
- Older unit of dose equivalent, still used in the US: exactly 0.01 Sv.
- Exact
- Yes, the value is exact by definition
- Source
- NIST Special Publication 811 (2008), Appendix B.8
Common applications
Still used in the United States in radiation protection and regulation, alongside the sievert.
Rem in other radiation dose (equivalent) units
- 1 rem = 0.01 SvRem to Sievert converter
- 1 rem = 10 mSvMillisievert
- 1 rem = 10000 µSvMicrosievert
- 1 rem = 1000 mremMillirem
Rem quick reference
| Rem | Sievert | Microsievert | Millirem |
|---|---|---|---|
| 1 rem | = 0.01 Sv | = 10000 µSv | = 1000 mrem |
| 10 rem | = 0.1 Sv | = 100000 µSv | = 10000 mrem |
| 100 rem | = 1 Sv | = 1000000 µSv | = 100000 mrem |
| 1000 rem | = 10 Sv | = 10000000 µSv | = 1000000 mrem |
Where the rem fits
The next smaller radiation dose (equivalent) unit is the millisievert (mSv). 1 rem = 10 mSv, and 1 mSv = 0.1 rem.
The next larger radiation dose (equivalent) unit is the sievert (Sv). 1 rem = 0.01 Sv, and 1 Sv = 100 rem.
Frequently asked questions
- How many sieverts are in one rem?
- One rem = 0.01 Sv (sieverts).
- How many microsieverts are in one rem?
- One rem = 10000 µSv (microsieverts).
- How many millirem are in one rem?
- One rem = 1000 mrem (millirem).