Femtosievert is 1e-15 sievert units.
Femtosieverts to Hectosieverts Converter — fSv to hSv
Convert Femtosievert (fSv) to Hectosievert (hSv) using the exact conversion factor (1 femtosievert = 1e-17 hectosievert). See the formula, worked examples, and conversion table.
Femtosieverts to Hectosieverts converter
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.
Hectosievert is 100 sievert units.
Result = input x 1e-15 / 100.
Equivalent Dose units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Femtosieverts to Hectosieverts
Femtosievert and Hectosievert both belong to the radiation-measurement family, though radiation quantities fall into genuinely distinct categories: absorbed dose (gray, rad) measures energy deposited in matter, equivalent dose (sievert, rem) weights that for biological harm, and activity (becquerel, curie) measures how often a radioactive source decays — this page only converts between units of the same kind. Specifically: Femtosievert is 1e-15 sievert units, and hectosievert is 100 sievert units.
Formula
hectosieverts = femtosieverts × 1e-17
This factor comes from each unit's defined relationship to the category's base unit: 1 femtosievert equals 1e-15 base units, and 1 hectosievert equals 100 base units, so dividing one by the other gives the direct femtosievert-to-hectosievert factor of 1e-17.
Simple example
1 fSv × 1e-17 = 1e-17 hSv
1 femtosievert = 1e-17 hectosieverts.
Real-world example
10 fSv × 1e-17 = 1e-16 hSv
10 femtosieverts = 1e-16 hectosieverts.
Conversion table
| Femtosievert (fSv) | Hectosievert (hSv) |
|---|---|
| 0.001 fSv | 1e-20 hSv |
| 0.01 fSv | 1e-19 hSv |
| 0.1 fSv | 1e-18 hSv |
| 1 fSv | 1e-17 hSv |
| 10 fSv | 1e-16 hSv |
| 100 fSv | 1e-15 hSv |
Reverse conversion: Hectosievert to Femtosievert
1e-17 hSv × 1e+17 = 1 fSv
1e-17 hectosieverts = 1 femtosievert.
femtosieverts = hectosieverts × 1e+17
For a page dedicated to this direction, see Hectosievert to Femtosievert.
Understanding the Femtosievert (fSv)
Femtosievert is 1e-15 sievert units.
Understanding the Hectosievert (hSv)
Hectosievert is 100 sievert units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many hectosieverts are in 1 femtosievert?
1 femtosievert equals 1e-17 hectosieverts, using the exact defined conversion factor rather than an estimate.
How do I convert femtosievert to hectosievert?
Multiply the femtosievert value by 1e-17. The converter above does this instantly to whatever precision you set.
How do I convert hectosievert back to femtosievert?
Use the reverse factor: 1 hectosievert equals 1e+17 femtosieverts. You can also use the swap control in the converter above to flip the direction instantly.
What is a femtosievert?
Femtosievert (fSv) is a unit of radiation.
What is a hectosievert?
Hectosievert (hSv) is a unit of radiation.
Is the femtosievert to hectosievert conversion exact?
Yes. Both femtosievert and hectosievert are defined by fixed standards rather than physical artifacts, so the factor of 1e-17 used above is exact to as many digits as you choose to display.
What's the difference between absorbed dose, equivalent dose, and activity?
Absorbed dose (gray, rad) measures the energy radiation deposits in matter. Equivalent dose (sievert, rem) adjusts that figure for how harmful different types of radiation are to biological tissue. Activity (becquerel, curie) measures how often a radioactive source decays, independent of how much dose a person actually receives from it.