Nanosievert is 1e-9 sievert units.
Nanosieverts to Attosieverts Converter — nSv to aSv
Convert Nanosievert (nSv) to Attosievert (aSv) using the exact conversion factor (1 nanosievert = 1,000,000,000 attosievert). See the formula, worked examples, and conversion table.
Nanosieverts 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-9 / 1e-18.
Equivalent Dose units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Nanosieverts to Attosieverts
Nanosievert 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: Nanosievert is 1e-9 sievert units, and attosievert is 1e-18 sievert units.
Formula
attosieverts = nanosieverts × 1000000000
This factor comes from each unit's defined relationship to the category's base unit: 1 nanosievert equals 1e-9 base units, and 1 attosievert equals 1e-18 base units, so dividing one by the other gives the direct nanosievert-to-attosievert factor of 1000000000.
Simple example
1 nSv × 1000000000 = 1,000,000,000 aSv
1 nanosievert = 1,000,000,000 attosieverts.
Real-world example
10 nSv × 1000000000 = 10,000,000,000 aSv
10 nanosieverts = 10,000,000,000 attosieverts.
Conversion table
| Nanosievert (nSv) | Attosievert (aSv) |
|---|---|
| 0.001 nSv | 1,000,000 aSv |
| 0.01 nSv | 10,000,000 aSv |
| 0.1 nSv | 100,000,000 aSv |
| 1 nSv | 1,000,000,000 aSv |
| 10 nSv | 10,000,000,000 aSv |
| 100 nSv | 100,000,000,000 aSv |
Reverse conversion: Attosievert to Nanosievert
1 aSv × 1e-9 = 1e-9 nSv
1 attosievert = 1e-9 nanosieverts.
nanosieverts = attosieverts × 1e-9
For a page dedicated to this direction, see Attosievert to Nanosievert.
Understanding the Nanosievert (nSv)
Nanosievert is 1e-9 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 nanosievert?
1 nanosievert equals 1,000,000,000 attosieverts, using the exact defined conversion factor rather than an estimate.
How do I convert nanosievert to attosievert?
Multiply the nanosievert value by 1000000000. The converter above does this instantly to whatever precision you set.
How do I convert attosievert back to nanosievert?
Use the reverse factor: 1 attosievert equals 1e-9 nanosieverts. You can also use the swap control in the converter above to flip the direction instantly.
What is a nanosievert?
Nanosievert (nSv) is a unit of radiation.
What is a attosievert?
Attosievert (aSv) is a unit of radiation.
Is the nanosievert to attosievert conversion exact?
Yes. Both nanosievert and attosievert are defined by fixed standards rather than physical artifacts, so the factor of 1000000000 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.