How to convert millisieverts to microsieverts
µSv = mSv × 1,000Multiply the value in millisieverts by 1,000. To go the other way, multiply by 0.001 (or divide by 1,000).
A millisievert is larger than a microsievert: one millisievert contains 1,000 microsieverts.
Worked examples
- 1 millisievert1 mSv × 1,000 = 1,000 µSv
- 5 millisieverts5 mSv × 1,000 = 5,000 µSv
- 10 millisieverts10 mSv × 1,000 = 10,000 µSv
- 20 millisieverts20 mSv × 1,000 = 20,000 µSv
- 100 millisieverts100 mSv × 1,000 = 100,000 µSv
Millisieverts to microsieverts conversion table
Values are calculated by the conversion engine and rounded to 8 significant figures.
| Millisieverts (mSv) | Microsieverts (µSv) |
|---|---|
| 0.1 mSv | 100 µSv |
| 0.25 mSv | 250 µSv |
| 0.5 mSv | 500 µSv |
| 1 mSv | 1,000 µSv |
| 2 mSv | 2,000 µSv |
| 3 mSv | 3,000 µSv |
| 4 mSv | 4,000 µSv |
| 5 mSv | 5,000 µSv |
| 6 mSv | 6,000 µSv |
| 7 mSv | 7,000 µSv |
| 8 mSv | 8,000 µSv |
| 9 mSv | 9,000 µSv |
| 10 mSv | 10,000 µSv |
| Millisieverts (mSv) | Microsieverts (µSv) |
|---|---|
| 12 mSv | 12,000 µSv |
| 15 mSv | 15,000 µSv |
| 20 mSv | 20,000 µSv |
| 25 mSv | 25,000 µSv |
| 30 mSv | 30,000 µSv |
| 40 mSv | 40,000 µSv |
| 50 mSv | 50,000 µSv |
| 75 mSv | 75,000 µSv |
| 100 mSv | 100,000 µSv |
| 250 mSv | 250,000 µSv |
| 500 mSv | 500,000 µSv |
| 1,000 mSv | 1,000,000 µSv |
About the units
Millisievert (mSv)
Annual occupational limits and medical-imaging doses are quoted in mSv. One millisievert equals 0.001 sieverts (Sv).
Microsievert (µSv)
A dental X-ray is around 5 µSv. One microsievert equals 0.000001 sieverts (Sv).
Frequently asked questions
How many microsieverts are in one millisievert?
There are 1,000 microsieverts in one millisievert, and this value is exact by definition.
How do I convert millisieverts to microsieverts?
Multiply the number of millisieverts by 1,000. For example, 10 mSv × 1,000 = 10,000 µSv.
How many millisieverts are in one microsievert?
One microsievert equals 0.001 millisieverts. That is the reverse factor, 1 ÷ 1,000.
What is 10 millisieverts in microsieverts?
10 mSv = 10,000 µSv.
Is this mSv to µSv converter accurate?
Yes. Both units are defined exactly in terms of SI units, so the conversion factor is exact; results are shown to 12 significant figures by default and you can change precision in the converter. Calculations run in your browser using the same tested engine that generated this page.