Microsievert is 0.000001 sievert units.
Microsieverts to Attosieverts Converter — uSv to aSv
Convert Microsievert (uSv) to Attosievert (aSv) using the exact conversion factor (1 microsievert = 1,000,000,000,000 attosievert). See the formula, worked examples, and conversion table.
Microsieverts to Attosieverts 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.
Attosievert is 1e-18 sievert units.
Result = input x 1e-6 / 1e-18.
Equivalent Dose units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Microsieverts to Attosieverts
Microsievert and Attosievert 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 attosievert is 1e-18 sievert units.
Formula
attosieverts = microsieverts × 1000000000000
This factor comes from each unit's defined relationship to the category's base unit: 1 microsievert equals 0.000001 base units, and 1 attosievert equals 1e-18 base units, so dividing one by the other gives the direct microsievert-to-attosievert factor of 1000000000000.
Simple example
1 uSv × 1000000000000 = 1,000,000,000,000 aSv
1 microsievert = 1,000,000,000,000 attosieverts.
Real-world example
10 uSv × 1000000000000 = 1e+13 aSv
10 microsieverts = 1e+13 attosieverts.
Conversion table
| Microsievert (uSv) | Attosievert (aSv) |
|---|---|
| 0.001 uSv | 1,000,000,000 aSv |
| 0.01 uSv | 10,000,000,000 aSv |
| 0.1 uSv | 100,000,000,000 aSv |
| 1 uSv | 1,000,000,000,000 aSv |
| 10 uSv | 1e+13 aSv |
| 100 uSv | 1e+14 aSv |
Reverse conversion: Attosievert to Microsievert
1 aSv × 1e-12 = 1e-12 uSv
1 attosievert = 1e-12 microsieverts.
microsieverts = attosieverts × 1e-12
For a page dedicated to this direction, see Attosievert to Microsievert.
Understanding the Microsievert (uSv)
Microsievert is 0.000001 sievert units.
Understanding the Attosievert (aSv)
Attosievert is 1e-18 sievert units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many attosieverts are in 1 microsievert?
1 microsievert equals 1,000,000,000,000 attosieverts, using the exact defined conversion factor rather than an estimate.
How do I convert microsievert to attosievert?
Multiply the microsievert value by 1000000000000. The converter above does this instantly to whatever precision you set.
How do I convert attosievert back to microsievert?
Use the reverse factor: 1 attosievert equals 1e-12 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 attosievert?
Attosievert (aSv) is a unit of radiation.
Is the microsievert to attosievert conversion exact?
Yes. Both microsievert and attosievert are defined by fixed standards rather than physical artifacts, so the factor of 1000000000000 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.