Millisievert is 0.001 sievert units.
Millisieverts to Kilosieverts Converter — mSv to kSv
Convert Millisievert (mSv) to Kilosievert (kSv) using the exact conversion factor (1 millisievert = 0.000001 kilosievert). See the formula, worked examples, and conversion table.
Millisieverts to Kilosieverts converter
Converter
Radiation Converter
Convert radioactivity, absorbed dose, and equivalent dose units by compatible radiation family.
Context values
Some unit families need one extra value for a physically accurate result.
Kilosievert is 1000 sievert units.
Result = input x 0.001 / 1000.
Equivalent Dose units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Millisieverts to Kilosieverts
Millisievert and Kilosievert both belong to the radiation-measurement family, though radiation quantities fall into genuinely distinct categories: absorbed dose (gray, rad) measures energy deposited in matter, equivalent dose (sievert, rem) weights that for biological harm, and activity (becquerel, curie) measures how often a radioactive source decays — this page only converts between units of the same kind. Specifically: Millisievert is 0.001 sievert units, and kilosievert is 1000 sievert units.
Formula
kilosieverts = millisieverts × 0.000001
This factor comes from each unit's defined relationship to the category's base unit: 1 millisievert equals 0.001 base units, and 1 kilosievert equals 1000 base units, so dividing one by the other gives the direct millisievert-to-kilosievert factor of 0.000001.
Simple example
1 mSv × 0.000001 = 0.000001 kSv
1 millisievert = 0.000001 kilosieverts.
Real-world example
10 mSv × 0.000001 = 0.00001 kSv
10 millisieverts = 0.00001 kilosieverts.
Conversion table
| Millisievert (mSv) | Kilosievert (kSv) |
|---|---|
| 0.001 mSv | 1e-9 kSv |
| 0.01 mSv | 1e-8 kSv |
| 0.1 mSv | 1e-7 kSv |
| 1 mSv | 0.000001 kSv |
| 10 mSv | 0.00001 kSv |
| 100 mSv | 0.0001 kSv |
Reverse conversion: Kilosievert to Millisievert
0.000001 kSv × 1000000 = 1 mSv
0.000001 kilosieverts = 1 millisievert.
millisieverts = kilosieverts × 1000000
For a page dedicated to this direction, see Kilosievert to Millisievert.
Understanding the Millisievert (mSv)
Millisievert is 0.001 sievert units.
Understanding the Kilosievert (kSv)
Kilosievert is 1000 sievert units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many kilosieverts are in 1 millisievert?
1 millisievert equals 0.000001 kilosieverts, using the exact defined conversion factor rather than an estimate.
How do I convert millisievert to kilosievert?
Multiply the millisievert value by 0.000001. The converter above does this instantly to whatever precision you set.
How do I convert kilosievert back to millisievert?
Use the reverse factor: 1 kilosievert equals 1,000,000 millisieverts. You can also use the swap control in the converter above to flip the direction instantly.
What is a millisievert?
Millisievert (mSv) is a unit of radiation.
What is a kilosievert?
Kilosievert (kSv) is a unit of radiation.
Is the millisievert to kilosievert conversion exact?
Yes. Both millisievert and kilosievert are defined by fixed standards rather than physical artifacts, so the factor of 0.000001 used above is exact to as many digits as you choose to display.
What's the difference between absorbed dose, equivalent dose, and activity?
Absorbed dose (gray, rad) measures the energy radiation deposits in matter. Equivalent dose (sievert, rem) adjusts that figure for how harmful different types of radiation are to biological tissue. Activity (becquerel, curie) measures how often a radioactive source decays, independent of how much dose a person actually receives from it.