Convert Millirem to Sieverts (mrem to Sv)
1 millirem (mrem) = 0.00001 sieverts (Sv). 1 Sv = 100000 mrem. Example: 15 mrem = 15 × 0.00001 = 0.00015 Sv.
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1 mrem = 0.00001 Sv
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk millirem to sievert converter to paste a column from Excel.
How to Convert Millirem to Sievert
- 1 mrem = 0.00001 Sv
- 1 Sv = 100000 mrem
- Example: convert 15 mrem to Sv: 15 mrem = 15 × 0.00001 Sv = 0.00015 Sv
Formula
Sv = mrem ÷ 100000
Derivation from SI units:
- 1 mrem = 10⁻⁵ Sv = 10 µSv.
- 1 Sv = 1 J/kg weighted for radiation type (and tissue for effective dose).
Both units are defined exactly, so the factor is exact. Millirem definition: millirem; Sievert definition: sievert.
Worked examples
- A reading of 20 mrem converts to 0.0002 Sv.
20 mrem × 0.00001 = 0.0002 Sv - A value of 620 mrem is 0.0062 Sv.
620 mrem × 0.00001 = 0.0062 Sv
Millirem to Sievert conversion table
| Millirem (mrem) | Sieverts (Sv) |
|---|---|
| 1 mrem | 0.00001 Sv |
| 2 mrem | 0.00002 Sv |
| 10 mrem | 0.0001 Sv |
| 20 mrem | 0.0002 Sv |
| 100 mrem | 0.001 Sv |
| 310 mrem | 0.0031 Sv |
| 620 mrem | 0.0062 Sv |
| 1000 mrem | 0.01 Sv |
| 5000 mrem | 0.05 Sv |
| 10000 mrem | 0.1 Sv |
Where it's used
Millirem are used for US public dose limit (100 mrem/yr), while sieverts appear in radiation protection limits. Both measure equivalent and effective radiation dose, so the conversion is a fixed factor.
Millirem to other equivalent dose units
| Conversion | 1 mrem equals |
|---|---|
| millirem to sievert | 0.00001 Sv |
| millirem to millisievert | 0.01 mSv |
| millirem to microsievert | 10 µSv |
| millirem to rem | 0.001 rem |
| millirem to nanosievert | 10000 nSv |
Frequently asked questions
How many sieverts are in 1 millirem?
1 mrem = 0.00001 Sv.
How do I convert millirem to sieverts?
Multiply the value in mrem by 0.00001, or divide it by 100000. For example, 15 mrem × 0.00001 = 0.00015 Sv.
Is the mrem to Sv conversion exact?
Yes. Both units are defined exactly, and 1 mrem is exactly 0.00001 Sv.
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 Sieverts (mrem to Sv). Retrieved October 25, 2026, from https://scientificconverters.com/equivalent-dose/millirem-to-sieverts/
IEEE
Scientific Converters, "Convert Millirem to Sieverts (mrem to Sv)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/equivalent-dose/millirem-to-sieverts/