Femtosievert is 1e-15 sievert units.
Femtosievert to Femtogray
Convert Femtosievert (fSv) to Femtogray (fGy) instantly. Free online radiation converter with formulas, tables and examples.
Reserved for a responsive leaderboard above the conversion details.
Professional calculator style
World-scale conversion engine
30+ categories
6,500+ units
Instant results
Offline ready
Converter
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.
Femtogray is 1e-15 gray units.
fGy = fSv × 1
Results update instantly for Femtosievert to Femtogray conversions.
Reserved above the conversion cards and below the converter.
Formula
1 Femtosievert = 1 Femtogray
fGy = fSv × 1
fSv = fGy ÷ 1
Conversion table
| 1 fSv | 1 fGy |
| 2 fSv | 2 fGy |
| 5 fSv | 5 fGy |
| 10 fSv | 10 fGy |
| 20 fSv | 20 fGy |
| 50 fSv | 50 fGy |
| 100 fSv | 100 fGy |
Related conversions
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many Femtograys are in one Femtosievert?
One Femtosievert equals 1 Femtograys.
How do I convert Femtosievert to Femtogray?
Multiply the number of Femtosieverts by 1 to get Femtograys. To go the other way, multiply Femtograys by 1 (or divide by 1) to get Femtosieverts.
Is this conversion exact?
Yes. This conversion uses the exact defined relationship between Femtosievert and Femtogray, so the result shown is mathematically precise (rounded only for display).
When is Femtosievert to Femtogray conversion commonly used?
It is commonly used in nuclear medicine, radiation safety, health physics, and scientific research involving radioactivity and radiation dose.
Reserved between the FAQ and the article so the page stays balanced.
About this conversion
Femtosievert and Femtogray are units used in the radiation family of measurements. Femtosievert measures equivalent radiation dose (biological risk-weighted dose), while Femtogray 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 = 1 Femtograys (equivalently 1 Femtogray = 1 Femtosieverts), so results stay accurate for nuclear medicine, radiation safety, health physics, and scientific research.