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