Femtosievert is 1e-15 sievert units.
Femtosievert to Gray
Convert Femtosievert (fSv) to Gray (Gy) instantly. Free online radiation converter with formulas, tables and examples.
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Convert radioactivity, absorbed dose, and equivalent dose units by compatible radiation family.
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Gray is absorbed dose in joules per kilogram.
Gy = fSv × 1e-15
Results update instantly for Femtosievert to Gray conversions.
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Formula
1 Femtosievert = 1e-15 Gray
Gy = fSv × 1e-15
fSv = Gy ÷ 1e-15
Conversion table
| 1 fSv | 1e-15 Gy |
| 2 fSv | 2e-15 Gy |
| 5 fSv | 5e-15 Gy |
| 10 fSv | 1e-14 Gy |
| 20 fSv | 2e-14 Gy |
| 50 fSv | 5e-14 Gy |
| 100 fSv | 1e-13 Gy |
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Frequently asked questions
How many Grays are in one Femtosievert?
One Femtosievert equals 1e-15 Grays.
How do I convert Femtosievert to Gray?
Multiply the number of Femtosieverts by 1e-15 to get Grays. To go the other way, multiply Grays by 1e+15 (or divide by 1e-15) to get Femtosieverts.
Is this conversion exact?
Yes. This conversion uses the exact defined relationship between Femtosievert and Gray, so the result shown is mathematically precise (rounded only for display).
When is Femtosievert 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
Femtosievert and Gray are units used in the radiation family of measurements. Femtosievert 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 Femtosievert = 1e-15 Grays (equivalently 1 Gray = 1e+15 Femtosieverts), so results stay accurate for nuclear medicine, radiation safety, health physics, and scientific research.