Microsievert is 0.000001 sievert units.
Microsieverts to Kilosieverts Converter — uSv to kSv
Convert Microsievert (uSv) to Kilosievert (kSv) using the exact conversion factor (1 microsievert = 1e-9 kilosievert). See the formula, worked examples, and conversion table.
Microsieverts 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 1e-6 / 1000.
Equivalent Dose units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Microsieverts to Kilosieverts
Microsievert 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: Microsievert is 0.000001 sievert units, and kilosievert is 1000 sievert units.
Formula
kilosieverts = microsieverts × 1e-9
This factor comes from each unit's defined relationship to the category's base unit: 1 microsievert equals 0.000001 base units, and 1 kilosievert equals 1000 base units, so dividing one by the other gives the direct microsievert-to-kilosievert factor of 1e-9.
Simple example
1 uSv × 1e-9 = 1e-9 kSv
1 microsievert = 1e-9 kilosieverts.
Real-world example
10 uSv × 1e-9 = 1e-8 kSv
10 microsieverts = 1e-8 kilosieverts.
Conversion table
| Microsievert (uSv) | Kilosievert (kSv) |
|---|---|
| 0.001 uSv | 1e-12 kSv |
| 0.01 uSv | 1e-11 kSv |
| 0.1 uSv | 1e-10 kSv |
| 1 uSv | 1e-9 kSv |
| 10 uSv | 1e-8 kSv |
| 100 uSv | 1e-7 kSv |
Reverse conversion: Kilosievert to Microsievert
1e-9 kSv × 1000000000 = 1 uSv
1e-9 kilosieverts = 1 microsieverts.
microsieverts = kilosieverts × 1000000000
For a page dedicated to this direction, see Kilosievert to Microsievert.
Understanding the Microsievert (uSv)
Microsievert is 0.000001 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 microsievert?
1 microsievert equals 1e-9 kilosieverts, using the exact defined conversion factor rather than an estimate.
How do I convert microsievert to kilosievert?
Multiply the microsievert value by 1e-9. The converter above does this instantly to whatever precision you set.
How do I convert kilosievert back to microsievert?
Use the reverse factor: 1 kilosievert equals 1,000,000,000 microsieverts. You can also use the swap control in the converter above to flip the direction instantly.
What is a microsievert?
Microsievert (uSv) is a unit of radiation.
What is a kilosievert?
Kilosievert (kSv) is a unit of radiation.
Is the microsievert to kilosievert conversion exact?
Yes. Both microsievert and kilosievert are defined by fixed standards rather than physical artifacts, so the factor of 1e-9 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.