Femtofarad is 1e-15 farad units.
Femtofarads to Decifarads Converter — fF to dF
Convert Femtofarad (fF) to Decifarad (dF) using the exact conversion factor (1 femtofarad = 1e-14 decifarad). See the formula, worked examples, and conversion table.
Femtofarads to Decifarads 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.
Decifarad is 0.1 farad units.
Result = input x 1e-15 / 0.1.
Electrical units in the same family convert directly.
Reserved above the conversion cards and below the converter.
About Converting Femtofarads to Decifarads
Femtofarad and Decifarad 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: Femtofarad is 1e-15 farad units, and decifarad is 0.1 farad units.
Formula
decifarads = femtofarads × 1e-14
This factor comes from each unit's defined relationship to the category's base unit: 1 femtofarad equals 1e-15 base units, and 1 decifarad equals 0.1 base units, so dividing one by the other gives the direct femtofarad-to-decifarad factor of 1e-14.
Simple example
1 fF × 1e-14 = 1e-14 dF
1 femtofarad = 1e-14 decifarads.
Real-world example
120 fF × 1e-14 = 1.2e-12 dF
120 femtofarads = 1.2e-12 decifarads.
Conversion table
| Femtofarad (fF) | Decifarad (dF) |
|---|---|
| 1 fF | 1e-14 dF |
| 5 fF | 5e-14 dF |
| 12 fF | 1.2e-13 dF |
| 24 fF | 2.4e-13 dF |
| 120 fF | 1.2e-12 dF |
| 240 fF | 2.4e-12 dF |
Reverse conversion: Decifarad to Femtofarad
1e-14 dF × 1e+14 = 1 fF
1e-14 decifarads = 1 femtofarad.
femtofarads = decifarads × 1e+14
For a page dedicated to this direction, see Decifarad to Femtofarad.
Understanding the Femtofarad (fF)
Femtofarad is 1e-15 farad units.
Understanding the Decifarad (dF)
Decifarad is 0.1 farad units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many decifarads are in 1 femtofarad?
1 femtofarad equals 1e-14 decifarads, using the exact defined conversion factor rather than an estimate.
How do I convert femtofarad to decifarad?
Multiply the femtofarad value by 1e-14. The converter above does this instantly to whatever precision you set.
How do I convert decifarad back to femtofarad?
Use the reverse factor: 1 decifarad equals 1e+14 femtofarads. You can also use the swap control in the converter above to flip the direction instantly.
What is a femtofarad?
Femtofarad (fF) is a unit of electricity.
What is a decifarad?
Decifarad (dF) is a unit of electricity.
Is the femtofarad to decifarad conversion exact?
Yes. Both femtofarad and decifarad are defined by fixed standards rather than physical artifacts, so the factor of 1e-14 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.