A Femtosiemens (fS) equals 1e-15 siemens(s), a scaled unit of electrical conductance used for femto-scale electrical work.
Femtosiemens to Siemens
Convert Femtosiemens (fS) to Siemens (S) instantly with an exact formula, conversion table, and FAQ.
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
Electrical calculator
Electricity Converter
Convert femtosiemenss (fS) to siemenss (S) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
The siemens (S) is the SI unit of electrical conductance, the reciprocal of resistance.
S = fS × 1.000000e-15
Results update instantly for Femtosiemens to Siemens conversions.
Reserved above the conversion cards and below the converter.
Formula
S = fS × 1.000000e-15
fS = S × 1.000000e+15
Conversion table
| 1 fS | 1.000000e-15 S |
| 5 fS | 5.000000e-15 S |
| 10 fS | 1.000000e-14 S |
| 20 fS | 2.000000e-14 S |
| 50 fS | 5.000000e-14 S |
| 100 fS | 1.000000e-13 S |
| 500 fS | 5.000000e-13 S |
| 1000 fS | 1.000000e-12 S |
Related conversions
Reserved between the cards and the FAQ so the page stays balanced.
How the formula works
Both femtosiemens and siemens measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in femtosiemens by 1.000000e-15 to get siemens. To reverse the conversion, multiply a siemens value by 1.000000e+15 to get back to femtosiemens.
Frequently asked questions
What is Femtosiemens (fS)?
A Femtosiemens (fS) equals 1e-15 siemens(s), a scaled unit of electrical conductance used for femto-scale electrical work.
What is Siemens (S)?
The siemens (S) is the SI unit of electrical conductance, the reciprocal of resistance.
How do I convert femtosiemens to siemens?
Multiply the femtosiemens value by 1.000000e-15 to get the equivalent in siemens. For example, 5 fS × 1.000000e-15 = 5.000000e-15 S.
Is this conversion exact?
Yes. Both units use fixed, defined scale factors, so the factor 1.000000e-15 is an exact, non-rounded value.
Can I convert siemens back to femtosiemens?
Yes. Divide the siemens value by 1.000000e-15, or multiply it by 1.000000e+15, to get femtosiemens.
Reserved between the FAQ and the article so the page stays balanced.
About converting femtosiemens to siemens
A Femtosiemens (fS) equals 1e-15 siemens(s), a scaled unit of electrical conductance used for femto-scale electrical work. The siemens (S) is the SI unit of electrical conductance, the reciprocal of resistance.
Use this calculator to move between femtosiemenss and siemenss accurately for homework, engineering, billing, or everyday electricity calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.