The siemens (S) is the SI unit of electrical conductance, the reciprocal of resistance.
Siemens to Femtosiemens
Convert Siemens (S) to Femtosiemens (fS) instantly with an exact formula, conversion table, and FAQ.
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Convert siemenss (S) to femtosiemenss (fS) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A Femtosiemens (fS) equals 1e-15 siemens(s), a scaled unit of electrical conductance used for femto-scale electrical work.
fS = S × 1.000000e+15
Results update instantly for Siemens to Femtosiemens conversions.
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Formula
fS = S × 1.000000e+15
S = fS × 1.000000e-15
Conversion table
| 1 S | 1.000000e+15 fS |
| 5 S | 5.000000e+15 fS |
| 10 S | 1.000000e+16 fS |
| 20 S | 2.000000e+16 fS |
| 50 S | 5.000000e+16 fS |
| 100 S | 1.000000e+17 fS |
| 500 S | 5.000000e+17 fS |
| 1000 S | 1.000000e+18 fS |
Related conversions
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How the formula works
Both siemens and femtosiemens measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in siemens by 1.000000e+15 to get femtosiemens. To reverse the conversion, multiply a femtosiemens value by 1.000000e-15 to get back to siemens.
Frequently asked questions
What is Siemens (S)?
The siemens (S) is the SI unit of electrical conductance, the reciprocal of resistance.
What is Femtosiemens (fS)?
A Femtosiemens (fS) equals 1e-15 siemens(s), a scaled unit of electrical conductance used for femto-scale electrical work.
How do I convert siemens to femtosiemens?
Multiply the siemens value by 1.000000e+15 to get the equivalent in femtosiemens. For example, 5 S × 1.000000e+15 = 5.000000e+15 fS.
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 femtosiemens back to siemens?
Yes. Divide the femtosiemens value by 1.000000e+15, or multiply it by 1.000000e-15, to get siemens.
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About converting siemens to femtosiemens
The siemens (S) is the SI unit of electrical conductance, the reciprocal of resistance. A Femtosiemens (fS) equals 1e-15 siemens(s), a scaled unit of electrical conductance used for femto-scale electrical work.
Use this calculator to move between siemenss and femtosiemenss accurately for homework, engineering, billing, or everyday electricity calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.