Attosievert is 1e-18 sievert units.
Attosievert to Sievert
Convert Attosievert (aSv) to Sievert (Sv) instantly. Free online radiation converter with formulas, tables and examples.
Reserved for a responsive leaderboard above the conversion details.
Professional calculator style
World-scale conversion engine
30+ categories
6,500+ units
Instant results
Offline ready
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.
Sievert is equivalent dose.
Sv = aSv × 1e-18
Results update instantly for Attosievert to Sievert conversions.
Reserved above the conversion cards and below the converter.
Formula
1 Attosievert = 1e-18 Sievert
Sv = aSv × 1e-18
aSv = Sv ÷ 1e-18
Conversion table
| 1 aSv | 1e-18 Sv |
| 2 aSv | 2e-18 Sv |
| 5 aSv | 5e-18 Sv |
| 10 aSv | 1e-17 Sv |
| 20 aSv | 2e-17 Sv |
| 50 aSv | 5e-17 Sv |
| 100 aSv | 1e-16 Sv |
Related conversions
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many Sieverts are in one Attosievert?
One Attosievert equals 1e-18 Sieverts.
How do I convert Attosievert to Sievert?
Multiply the number of Attosieverts by 1e-18 to get Sieverts. To go the other way, multiply Sieverts by 1e+18 (or divide by 1e-18) to get Attosieverts.
Is this conversion exact?
Yes. This conversion uses the exact defined relationship between Attosievert and Sievert, so the result shown is mathematically precise (rounded only for display).
When is Attosievert to Sievert conversion commonly used?
It is commonly used in nuclear medicine, radiation safety, health physics, and scientific research involving radioactivity and radiation dose.
Reserved between the FAQ and the article so the page stays balanced.
About this conversion
Attosievert and Sievert are units used in the radiation family of measurements. Both units measure equivalent radiation dose (biological risk-weighted dose). This converter uses the precise relationship 1 Attosievert = 1e-18 Sieverts (equivalently 1 Sievert = 1e+18 Attosieverts), so results stay accurate for nuclear medicine, radiation safety, health physics, and scientific research.