Femtofarad is 1e-15 farad units.
Femtofarads to Zeptofarads Converter — fF to zF
Convert Femtofarad (fF) to Zeptofarad (zF) using the exact conversion factor (1 femtofarad = 1,000,000 zeptofarad). See the formula, worked examples, and conversion table.
Femtofarads to Zeptofarads 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.
Zeptofarad is 1e-21 farad units.
Result = input x 1e-15 / 1e-21.
Electrical units in the same family convert directly.
Reserved above the conversion cards and below the converter.
About Converting Femtofarads to Zeptofarads
Femtofarad and Zeptofarad 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 zeptofarad is 1e-21 farad units.
Formula
zeptofarads = femtofarads × 1000000
This factor comes from each unit's defined relationship to the category's base unit: 1 femtofarad equals 1e-15 base units, and 1 zeptofarad equals 1e-21 base units, so dividing one by the other gives the direct femtofarad-to-zeptofarad factor of 1000000.
Simple example
1 fF × 1000000 = 1,000,000 zF
1 femtofarad = 1,000,000 zeptofarads.
Real-world example
120 fF × 1000000 = 120,000,000 zF
120 femtofarads = 120,000,000 zeptofarads.
Conversion table
| Femtofarad (fF) | Zeptofarad (zF) |
|---|---|
| 1 fF | 1,000,000 zF |
| 5 fF | 5,000,000 zF |
| 12 fF | 12,000,000 zF |
| 24 fF | 24,000,000 zF |
| 120 fF | 120,000,000 zF |
| 240 fF | 240,000,000 zF |
Reverse conversion: Zeptofarad to Femtofarad
1 zF × 1e-6 = 1e-6 fF
1 zeptofarad = 1e-6 femtofarads.
femtofarads = zeptofarads × 1e-6
For a page dedicated to this direction, see Zeptofarad to Femtofarad.
Understanding the Femtofarad (fF)
Femtofarad is 1e-15 farad units.
Understanding the Zeptofarad (zF)
Zeptofarad is 1e-21 farad units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many zeptofarads are in 1 femtofarad?
1 femtofarad equals 1,000,000 zeptofarads, using the exact defined conversion factor rather than an estimate.
How do I convert femtofarad to zeptofarad?
Multiply the femtofarad value by 1000000. The converter above does this instantly to whatever precision you set.
How do I convert zeptofarad back to femtofarad?
Use the reverse factor: 1 zeptofarad equals 1e-6 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 zeptofarad?
Zeptofarad (zF) is a unit of electricity.
Is the femtofarad to zeptofarad conversion exact?
Yes. Both femtofarad and zeptofarad are defined by fixed standards rather than physical artifacts, so the factor of 1000000 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.