Convert Millirem to Millisieverts (mrem to mSv)
1 millirem (mrem) = 0.01 millisieverts (mSv). 1 mSv = 100 mrem. Example: 620 mrem = 620 × 0.01 = 6.2 mSv.
Also searched as mrem to mSv, millirem to millisieverts and mrem to msv.
1 mrem = 0.01 mSv
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk millirem to millisievert converter to paste a column from Excel.
How to Convert Millirem to Millisievert
- 1 mrem = 0.01 mSv
- 1 mSv = 100 mrem
- Example: convert 620 mrem to mSv: 620 mrem = 620 × 0.01 mSv = 6.2 mSv
Formula
mSv = mrem ÷ 100
Derivation from SI units:
- 1 mrem = 10⁻⁵ Sv = 10 µSv.
- 1 mSv = 10⁻³ Sv.
- 1 mrem = 0.00001 Sv ÷ 0.001 Sv per mSv = 0.01 mSv
Both units are defined exactly, so the factor is exact. Millirem definition: millirem; Millisievert definition: millisievert.
Worked examples
- The average US annual dose of 620 mrem is 6.2 mSv.
620 mrem × 0.01 = 6.2 mSv - 100 mrem is 1 mSv.
100 mrem × 0.01 = 1 mSv
Millirem to Millisievert conversion table
| Millirem (mrem) | Millisieverts (mSv) |
|---|---|
| 1 mrem | 0.01 mSv |
| 2 mrem | 0.02 mSv |
| 10 mrem | 0.1 mSv |
| 20 mrem | 0.2 mSv |
| 100 mrem | 1 mSv |
| 310 mrem | 3.1 mSv |
| 620 mrem | 6.2 mSv |
| 1000 mrem | 10 mSv |
| 5000 mrem | 50 mSv |
| 10000 mrem | 100 mSv |
Where it's used
Doses in millirem from US dosimetry reports and NRC limits are converted to millisieverts for comparison with medical and international figures. Divide by 100.
Millirem to other equivalent dose units
| Conversion | 1 mrem equals |
|---|---|
| millirem to millisievert | 0.01 mSv |
| millirem to sievert | 0.00001 Sv |
| millirem to microsievert | 10 µSv |
| millirem to rem | 0.001 rem |
| millirem to nanosievert | 10000 nSv |
Frequently asked questions
What is the average yearly radiation dose in the US?
About 620 mrem (6.2 mSv) per person (NCRP Report 160), half from natural background and half mostly from medical imaging.
How many millisieverts are in 1 millirem?
1 mrem = 0.01 mSv.
How do I convert millirem to millisieverts?
Multiply the value in mrem by 0.01, or divide it by 100. For example, 620 mrem × 0.01 = 6.2 mSv.
Is the mrem to mSv conversion exact?
Yes. Both units are defined exactly, and 1 mrem is exactly 0.01 mSv.
Sources
- 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".
- 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). Convert Millirem to Millisieverts (mrem to mSv). Retrieved October 25, 2026, from https://scientificconverters.com/equivalent-dose/millirem-to-millisieverts/
IEEE
Scientific Converters, "Convert Millirem to Millisieverts (mrem to mSv)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/equivalent-dose/millirem-to-millisieverts/