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