Microsievert is 0.000001 sievert units.
Microsieverts to Nanosieverts Converter — uSv to nSv
Convert Microsievert (uSv) to Nanosievert (nSv) using the exact conversion factor (1 microsievert = 1,000 nanosievert). See the formula, worked examples, and conversion table.
Microsieverts to Nanosieverts 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.
Nanosievert is 1e-9 sievert units.
Result = input x 1e-6 / 1e-9.
Equivalent Dose units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Microsieverts to Nanosieverts
Microsievert and Nanosievert 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 nanosievert is 1e-9 sievert units.
Formula
nanosieverts = microsieverts × 1000
This factor comes from each unit's defined relationship to the category's base unit: 1 microsievert equals 0.000001 base units, and 1 nanosievert equals 1e-9 base units, so dividing one by the other gives the direct microsievert-to-nanosievert factor of 1000.
Simple example
1 uSv × 1000 = 1,000 nSv
1 microsievert = 1,000 nanosieverts.
Real-world example
10 uSv × 1000 = 10,000 nSv
10 microsieverts = 10,000 nanosieverts.
Conversion table
| Microsievert (uSv) | Nanosievert (nSv) |
|---|---|
| 0.001 uSv | 1 nSv |
| 0.01 uSv | 10 nSv |
| 0.1 uSv | 100 nSv |
| 1 uSv | 1,000 nSv |
| 10 uSv | 10,000 nSv |
| 100 uSv | 100,000 nSv |
Reverse conversion: Nanosievert to Microsievert
1 nSv × 0.001 = 0.001 uSv
1 nanosievert = 0.001 microsieverts.
microsieverts = nanosieverts × 0.001
For a page dedicated to this direction, see Nanosievert to Microsievert.
Understanding the Microsievert (uSv)
Microsievert is 0.000001 sievert units.
Understanding the Nanosievert (nSv)
Nanosievert is 1e-9 sievert units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many nanosieverts are in 1 microsievert?
1 microsievert equals 1,000 nanosieverts, using the exact defined conversion factor rather than an estimate.
How do I convert microsievert to nanosievert?
Multiply the microsievert value by 1000. The converter above does this instantly to whatever precision you set.
How do I convert nanosievert back to microsievert?
Use the reverse factor: 1 nanosievert equals 0.001 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 nanosievert?
Nanosievert (nSv) is a unit of radiation.
Is the microsievert to nanosievert conversion exact?
Yes. Both microsievert and nanosievert are defined by fixed standards rather than physical artifacts, so the factor of 1000 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.