Femtofarad is 1e-15 farad units.
Femtofarads to Attofarads Converter — fF to aF
Convert Femtofarad (fF) to Attofarad (aF) using the exact conversion factor (1 femtofarad = 1,000 attofarad). See the formula, worked examples, and conversion table.
Femtofarads to Attofarads 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.
Attofarad is 1e-18 farad units.
Result = input x 1e-15 / 1e-18.
Electrical units in the same family convert directly.
Reserved above the conversion cards and below the converter.
About Converting Femtofarads to Attofarads
Femtofarad and Attofarad 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 attofarad is 1e-18 farad units.
Formula
attofarads = femtofarads × 1000
This factor comes from each unit's defined relationship to the category's base unit: 1 femtofarad equals 1e-15 base units, and 1 attofarad equals 1e-18 base units, so dividing one by the other gives the direct femtofarad-to-attofarad factor of 1000.
Simple example
1 fF × 1000 = 1,000 aF
1 femtofarad = 1,000 attofarads.
Real-world example
120 fF × 1000 = 120,000 aF
120 femtofarads = 120,000 attofarads.
Conversion table
| Femtofarad (fF) | Attofarad (aF) |
|---|---|
| 1 fF | 1,000 aF |
| 5 fF | 5,000 aF |
| 12 fF | 12,000 aF |
| 24 fF | 24,000 aF |
| 120 fF | 120,000 aF |
| 240 fF | 240,000 aF |
Reverse conversion: Attofarad to Femtofarad
1 aF × 0.001 = 0.001 fF
1 attofarad = 0.001 femtofarads.
femtofarads = attofarads × 0.001
For a page dedicated to this direction, see Attofarad to Femtofarad.
Understanding the Femtofarad (fF)
Femtofarad is 1e-15 farad units.
Understanding the Attofarad (aF)
Attofarad is 1e-18 farad units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many attofarads are in 1 femtofarad?
1 femtofarad equals 1,000 attofarads, using the exact defined conversion factor rather than an estimate.
How do I convert femtofarad to attofarad?
Multiply the femtofarad value by 1000. The converter above does this instantly to whatever precision you set.
How do I convert attofarad back to femtofarad?
Use the reverse factor: 1 attofarad equals 0.001 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 attofarad?
Attofarad (aF) is a unit of electricity.
Is the femtofarad to attofarad conversion exact?
Yes. Both femtofarad and attofarad are defined by fixed standards rather than physical artifacts, so the factor of 1000 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.