Convert Millisieverts to Microsieverts (mSv to µSv)
1 millisievert (mSv) = 1000 microsieverts (µSv). 1 µSv = 0.001 mSv. Example: 15 mSv = 15 × 1000 = 15000 µSv.
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1 mSv = 1000 µSv
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk millisievert to microsievert converter to paste a column from Excel.
How to Convert Millisievert to Microsievert
- 1 mSv = 1000 µSv
- 1 µSv = 0.001 mSv
- Example: convert 15 mSv to µSv: 15 mSv = 15 × 1000 µSv = 15000 µSv
Formula
µSv = mSv × 1000
Derivation from SI units:
- 1 mSv = 10⁻³ Sv.
- 1 µSv = 10⁻⁶ Sv.
- 1 mSv = 0.001 Sv ÷ 0.000001 Sv per µSv = 1000 µSv
Both units are defined exactly, so the factor is exact. Millisievert definition: millisievert; Microsievert definition: microsievert.
Worked examples
- A reading of 2.4 mSv converts to 2400 µSv.
2.4 mSv × 1000 = 2400 µSv - A value of 10 mSv is 10000 µSv.
10 mSv × 1000 = 10000 µSv
Millisievert to Microsievert conversion table
| Millisieverts (mSv) | Microsieverts (µSv) |
|---|---|
| 0.01 mSv | 10 µSv |
| 0.1 mSv | 100 µSv |
| 1 mSv | 1000 µSv |
| 2.4 mSv | 2400 µSv |
| 3 mSv | 3000 µSv |
| 7 mSv | 7000 µSv |
| 10 mSv | 10000 µSv |
| 20 mSv | 20000 µSv |
| 50 mSv | 50000 µSv |
| 100 mSv | 100000 µSv |
Where it's used
Millisieverts are used for annual dose limits, while microsieverts appear in geiger counter and dosimeter readings (µSv/h). Both measure equivalent and effective radiation dose, so the conversion is a fixed factor.
Millisievert to other equivalent dose units
| Conversion | 1 mSv equals |
|---|---|
| millisievert to microsievert | 1000 µSv |
| millisievert to sievert | 0.001 Sv |
| millisievert to rem | 0.1 rem |
| millisievert to millirem | 100 mrem |
| millisievert to nanosievert | 1000000 nSv |
Frequently asked questions
How many microsieverts are in 1 millisievert?
1 mSv = 1000 µSv.
How do I convert millisieverts to microsieverts?
Multiply the value in mSv by 1000. For example, 15 mSv × 1000 = 15000 µSv.
Is the mSv to µSv conversion exact?
Yes. Both units are defined exactly, and 1 mSv is exactly 1000 µSv.
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).
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 Millisieverts to Microsieverts (mSv to µSv). Retrieved October 25, 2026, from https://scientificconverters.com/equivalent-dose/millisieverts-to-microsieverts/
IEEE
Scientific Converters, "Convert Millisieverts to Microsieverts (mSv to µSv)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/equivalent-dose/millisieverts-to-microsieverts/