Gray is absorbed dose in joules per kilogram.
Gray to Attosievert
Convert Gray (Gy) to Attosievert (aSv) instantly. Free online radiation converter with formulas, tables and examples.
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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.
aSv = Gy × 1e+18
Results update instantly for Gray to Attosievert conversions.
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Formula
1 Gray = 1e+18 Attosievert
aSv = Gy × 1e+18
Gy = aSv ÷ 1e+18
Conversion table
| 1 Gy | 1e+18 aSv |
| 2 Gy | 2e+18 aSv |
| 5 Gy | 5e+18 aSv |
| 10 Gy | 1e+19 aSv |
| 20 Gy | 2e+19 aSv |
| 50 Gy | 5e+19 aSv |
| 100 Gy | 1e+20 aSv |
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Frequently asked questions
How many Attosieverts are in one Gray?
One Gray equals 1e+18 Attosieverts.
How do I convert Gray to Attosievert?
Multiply the number of Grays by 1e+18 to get Attosieverts. To go the other way, multiply Attosieverts by 1e-18 (or divide by 1e+18) to get Grays.
Is this conversion exact?
Yes. This conversion uses the exact defined relationship between Gray and Attosievert, so the result shown is mathematically precise (rounded only for display).
When is Gray to Attosievert conversion commonly used?
It is commonly used in nuclear medicine, radiation safety, health physics, and scientific research involving radioactivity and radiation dose.
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About this conversion
Gray and Attosievert are units used in the radiation family of measurements. Gray measures absorbed radiation dose (energy deposited per unit mass), while Attosievert measures equivalent radiation dose (biological risk-weighted dose). This page provides the direct numeric ratio between the two units. This converter uses the precise relationship 1 Gray = 1e+18 Attosieverts (equivalently 1 Attosievert = 1e-18 Grays), so results stay accurate for nuclear medicine, radiation safety, health physics, and scientific research.