Microsievert to Millisievert Converter
1 microsievert is exactly 0.001 millisieverts. Convert microsieverts (µSv) to millisieverts (mSv) below: type a value and the result updates as you type.
µSv to mSv calculator
Result
Microsievert to Millisievert conversion
1 µSv = 0.001 mSvone microsievert in millisieverts
1 mSv = 1000 µSvone millisievert in microsieverts
Microsievert (µSv): One millionth of a sievert. Dosimeters and Geiger counters often show µSv or µSv/h.
Millisievert (mSv): One thousandth of a sievert. Natural background radiation is a few mSv per year.
Source:SI Brochure, 9th edition (BIPM, 2019)
How to convert microsieverts to millisieverts
To convert microsieverts to millisieverts, multiply the number of microsieverts by 0.001.
Formula
mSv = µSv × 0.001
Examples
- 5 µSv = 5 × 0.001 = 0.005 mSv
- 25 µSv = 25 × 0.001 = 0.025 mSv
- 100 µSv = 100 × 0.001 = 0.1 mSv
Microsievert to Millisievert conversion table
| Microsievert (µSv) | Millisievert (mSv) |
|---|---|
| 0.1 µSv | 0.0001 mSv |
| 0.5 µSv | 0.0005 mSv |
| 1 µSv | 0.001 mSv |
| 2 µSv | 0.002 mSv |
| 3 µSv | 0.003 mSv |
| 5 µSv | 0.005 mSv |
| 10 µSv | 0.01 mSv |
| 20 µSv | 0.02 mSv |
| 25 µSv | 0.025 mSv |
| 50 µSv | 0.05 mSv |
| 100 µSv | 0.1 mSv |
| 250 µSv | 0.25 mSv |
| 500 µSv | 0.5 mSv |
| 1000 µSv | 1 mSv |
Values rounded to 10 significant digits where needed.
Frequently asked questions
- How many millisieverts are in one microsievert?
- One microsievert is exactly 0.001 millisieverts.
- How do I convert millisieverts to microsieverts?
- To convert millisieverts to microsieverts, multiply the number of millisieverts by 1000. The formula is µSv = mSv × 1000.
- Is this conversion exact?
- Yes. Both units have exact definitions and the factor 0.001 is exact. Displayed results are only rounded when they have many decimal places.
- Which is larger, a microsievert or a millisievert?
- A millisievert is 1000 times larger than a microsievert. In other words, a microsievert is exactly 1/1000 of a millisievert.