Attogray is 1e-18 gray units.
Attogray to Gray
Convert Attogray (aGy) to Gray (Gy) 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.
Gray is absorbed dose in joules per kilogram.
Gy = aGy × 1e-18
Results update instantly for Attogray to Gray conversions.
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Formula
1 Attogray = 1e-18 Gray
Gy = aGy × 1e-18
aGy = Gy ÷ 1e-18
Conversion table
| 1 aGy | 1e-18 Gy |
| 2 aGy | 2e-18 Gy |
| 5 aGy | 5e-18 Gy |
| 10 aGy | 1e-17 Gy |
| 20 aGy | 2e-17 Gy |
| 50 aGy | 5e-17 Gy |
| 100 aGy | 1e-16 Gy |
Related conversions
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Frequently asked questions
How many Grays are in one Attogray?
One Attogray equals 1e-18 Grays.
How do I convert Attogray to Gray?
Multiply the number of Attograys by 1e-18 to get Grays. To go the other way, multiply Grays by 1e+18 (or divide by 1e-18) to get Attograys.
Is this conversion exact?
Yes. This conversion uses the exact defined relationship between Attogray and Gray, so the result shown is mathematically precise (rounded only for display).
When is Attogray to Gray 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
Attogray and Gray are units used in the radiation family of measurements. Both units measure absorbed radiation dose (energy deposited per unit mass). This converter uses the precise relationship 1 Attogray = 1e-18 Grays (equivalently 1 Gray = 1e+18 Attograys), so results stay accurate for nuclear medicine, radiation safety, health physics, and scientific research.