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