Femtohenry is 1e-15 henry units.
Femtohenrys to Yoctohenrys Converter — fH to yH
Convert Femtohenry (fH) to Yoctohenry (yH) using the exact conversion factor (1 femtohenry = 1,000,000,000 yoctohenry). See the formula, worked examples, and conversion table.
Femtohenrys to Yoctohenrys converter
Converter
Electricity Converter
Convert electrical units by family and calculate voltage, current, resistance, power, and energy with context values.
Context values
Some unit families need one extra value for a physically accurate result.
Yoctohenry is 1e-24 henry units.
Result = input x 1e-15 / 1e-24.
Electrical units in the same family convert directly.
Reserved above the conversion cards and below the converter.
About Converting Femtohenrys to Yoctohenrys
Femtohenry and Yoctohenry both belong to the electricity family — voltage, current, resistance, power, or energy — units that show up constantly when working across the different standards used by household wiring (120V/240V depending on region), automotive electrical systems (12V/24V), and electronics design. Specifically: Femtohenry is 1e-15 henry units, and yoctohenry is 1e-24 henry units.
Formula
yoctohenrys = femtohenrys × 1000000000
This factor comes from each unit's defined relationship to the category's base unit: 1 femtohenry equals 1e-15 base units, and 1 yoctohenry equals 1e-24 base units, so dividing one by the other gives the direct femtohenry-to-yoctohenry factor of 1000000000.
Simple example
1 fH × 1000000000 = 1,000,000,000 yH
1 femtohenry = 1,000,000,000 yoctohenrys.
Real-world example
120 fH × 1000000000 = 120,000,000,000 yH
120 femtohenrys = 120,000,000,000 yoctohenrys.
Conversion table
| Femtohenry (fH) | Yoctohenry (yH) |
|---|---|
| 1 fH | 1,000,000,000 yH |
| 5 fH | 5,000,000,000 yH |
| 12 fH | 12,000,000,000 yH |
| 24 fH | 24,000,000,000 yH |
| 120 fH | 120,000,000,000 yH |
| 240 fH | 240,000,000,000 yH |
Reverse conversion: Yoctohenry to Femtohenry
1 yH × 1e-9 = 1e-9 fH
1 yoctohenry = 1e-9 femtohenrys.
femtohenrys = yoctohenrys × 1e-9
For a page dedicated to this direction, see Yoctohenry to Femtohenry.
Understanding the Femtohenry (fH)
Femtohenry is 1e-15 henry units.
Understanding the Yoctohenry (yH)
Yoctohenry is 1e-24 henry units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many yoctohenrys are in 1 femtohenry?
1 femtohenry equals 1,000,000,000 yoctohenrys, using the exact defined conversion factor rather than an estimate.
How do I convert femtohenry to yoctohenry?
Multiply the femtohenry value by 1000000000. The converter above does this instantly to whatever precision you set.
How do I convert yoctohenry back to femtohenry?
Use the reverse factor: 1 yoctohenry equals 1e-9 femtohenrys. You can also use the swap control in the converter above to flip the direction instantly.
What is a femtohenry?
Femtohenry (fH) is a unit of electricity.
What is a yoctohenry?
Yoctohenry (yH) is a unit of electricity.
Is the femtohenry to yoctohenry conversion exact?
Yes. Both femtohenry and yoctohenry are defined by fixed standards rather than physical artifacts, so the factor of 1000000000 used above is exact to as many digits as you choose to display.
What's the difference between voltage, current, and resistance?
Voltage (volts) is the electrical potential difference driving current through a circuit. Current (amperes) is the rate of flow of electric charge. Resistance (ohms) is how much a component opposes that flow. They're related by Ohm's law (V = I × R), but they are distinct physical quantities, and this page converts between units of just one of them.