Attosievert is 1e-18 sievert units.
Attosieverts to Quettasieverts Converter — aSv to QSv
Convert Attosievert (aSv) to Quettasievert (QSv) using the exact conversion factor (1 attosievert = 1e-48 quettasievert). See the formula, worked examples, and conversion table.
Attosieverts to Quettasieverts 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.
Quettasievert is 1e+30 sievert units.
Result = input x 1e-18 / 1e+30.
Equivalent Dose units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Attosieverts to Quettasieverts
Attosievert and Quettasievert 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: Attosievert is 1e-18 sievert units, and quettasievert is 1e+30 sievert units.
Formula
quettasieverts = attosieverts × 1e-48
This factor comes from each unit's defined relationship to the category's base unit: 1 attosievert equals 1e-18 base units, and 1 quettasievert equals 1e+30 base units, so dividing one by the other gives the direct attosievert-to-quettasievert factor of 1e-48.
Simple example
1 aSv × 1e-48 = 1e-48 QSv
1 attosievert = 1e-48 quettasieverts.
Real-world example
10 aSv × 1e-48 = 1e-47 QSv
10 attosieverts = 1e-47 quettasieverts.
Conversion table
| Attosievert (aSv) | Quettasievert (QSv) |
|---|---|
| 0.001 aSv | 1e-51 QSv |
| 0.01 aSv | 1e-50 QSv |
| 0.1 aSv | 1e-49 QSv |
| 1 aSv | 1e-48 QSv |
| 10 aSv | 1e-47 QSv |
| 100 aSv | 1e-46 QSv |
Reverse conversion: Quettasievert to Attosievert
1e-48 QSv × 1e+48 = 1 aSv
1e-48 quettasieverts = 1 attosievert.
attosieverts = quettasieverts × 1e+48
For a page dedicated to this direction, see Quettasievert to Attosievert.
Understanding the Attosievert (aSv)
Attosievert is 1e-18 sievert units.
Understanding the Quettasievert (QSv)
Quettasievert is 1e+30 sievert units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many quettasieverts are in 1 attosievert?
1 attosievert equals 1e-48 quettasieverts, using the exact defined conversion factor rather than an estimate.
How do I convert attosievert to quettasievert?
Multiply the attosievert value by 1e-48. The converter above does this instantly to whatever precision you set.
How do I convert quettasievert back to attosievert?
Use the reverse factor: 1 quettasievert equals 1e+48 attosieverts. You can also use the swap control in the converter above to flip the direction instantly.
What is a attosievert?
Attosievert (aSv) is a unit of radiation.
What is a quettasievert?
Quettasievert (QSv) is a unit of radiation.
Is the attosievert to quettasievert conversion exact?
Yes. Both attosievert and quettasievert are defined by fixed standards rather than physical artifacts, so the factor of 1e-48 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.