Convert Microsieverts to Millirem (µSv to mrem)
1 microsievert (µSv) = 0.1 millirem (mrem). 1 mrem = 10 µSv. Example: 10 µSv = 10 × 0.1 = 1 mrem.
Also searched as µSv to mrem, uSv to mrem, microsieverts to millirem and µSv/h to mrem/h.
1 µSv = 0.1 mrem
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk microsievert to millirem converter to paste a column from Excel.
How to Convert Microsievert to Millirem
- 1 µSv = 0.1 mrem
- 1 mrem = 10 µSv
- Example: convert 10 µSv to mrem: 10 µSv = 10 × 0.1 mrem = 1 mrem
Formula
mrem = µSv ÷ 10
Derivation from SI units:
- 1 µSv = 10⁻⁶ Sv.
- 1 mrem = 10⁻⁵ Sv = 10 µSv.
- 1 µSv = 0.000001 Sv ÷ 0.00001 Sv per mrem = 0.1 mrem
Both units are defined exactly, so the factor is exact. Microsievert definition: microsievert; Millirem definition: millirem.
Worked examples
- 10 µSv is 1 mrem.
10 µSv × 0.1 = 1 mrem - A long-haul flight of about 40 µSv is 4 mrem.
40 µSv × 0.1 = 4 mrem
Microsievert to Millirem conversion table
| Microsieverts (µSv) | Millirem (mrem) |
|---|---|
| 0.1 µSv | 0.01 mrem |
| 0.27 µSv | 0.027 mrem |
| 1 µSv | 0.1 mrem |
| 5 µSv | 0.5 mrem |
| 10 µSv | 1 mrem |
| 20 µSv | 2 mrem |
| 40 µSv | 4 mrem |
| 100 µSv | 10 mrem |
| 1000 µSv | 100 mrem |
| 5000 µSv | 500 mrem |
Where it's used
Doses and dose rates in microsieverts from survey meters and dosimeters are converted to millirem for US forms. Divide by 10.
Microsievert to other equivalent dose units
| Conversion | 1 µSv equals |
|---|---|
| microsievert to millirem | 0.1 mrem |
| microsievert to sievert | 0.000001 Sv |
| microsievert to millisievert | 0.001 mSv |
| microsievert to rem | 0.0001 rem |
| microsievert to nanosievert | 1000 nSv |
Frequently asked questions
What reading is normal on a Geiger counter?
Natural background is typically 0.1–0.3 µSv/h, or 0.01–0.03 mrem/h, depending on altitude and local geology.
How many millirem are in 1 microsievert?
1 µSv = 0.1 mrem.
How do I convert microsieverts to millirem?
Multiply the value in µSv by 0.1, or divide it by 10. For example, 10 µSv × 0.1 = 1 mrem.
Is the µSv to mrem conversion exact?
Yes. Both units are defined exactly, and 1 µSv is exactly 0.1 mrem.
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).
- 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, "rem".
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). Convert Microsieverts to Millirem (µSv to mrem). Retrieved October 25, 2026, from https://scientificconverters.com/equivalent-dose/microsieverts-to-millirem/
IEEE
Scientific Converters, "Convert Microsieverts to Millirem (µSv to mrem)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/equivalent-dose/microsieverts-to-millirem/