Attofarad is 1e-18 farad units.
Attofarads to Femtofarads Converter — aF to fF
Convert Attofarad (aF) to Femtofarad (fF) using the exact conversion factor (1 attofarad = 0.001 femtofarad). See the formula, worked examples, and conversion table.
Attofarads to Femtofarads 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.
Femtofarad is 1e-15 farad units.
Result = input x 1e-18 / 1e-15.
Electrical units in the same family convert directly.
Reserved above the conversion cards and below the converter.
About Converting Attofarads to Femtofarads
Attofarad and Femtofarad 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: Attofarad is 1e-18 farad units, and femtofarad is 1e-15 farad units.
Formula
femtofarads = attofarads × 0.001
This factor comes from each unit's defined relationship to the category's base unit: 1 attofarad equals 1e-18 base units, and 1 femtofarad equals 1e-15 base units, so dividing one by the other gives the direct attofarad-to-femtofarad factor of 0.001.
Simple example
1 aF × 0.001 = 0.001 fF
1 attofarad = 0.001 femtofarads.
Real-world example
120 aF × 0.001 = 0.12 fF
120 attofarads = 0.12 femtofarads.
Conversion table
| Attofarad (aF) | Femtofarad (fF) |
|---|---|
| 1 aF | 0.001 fF |
| 5 aF | 0.005 fF |
| 12 aF | 0.012 fF |
| 24 aF | 0.024 fF |
| 120 aF | 0.12 fF |
| 240 aF | 0.24 fF |
Reverse conversion: Femtofarad to Attofarad
0.001 fF × 1000 = 1 aF
0.001 femtofarads = 1 attofarad.
attofarads = femtofarads × 1000
For a page dedicated to this direction, see Femtofarad to Attofarad.
Understanding the Attofarad (aF)
Attofarad is 1e-18 farad units.
Understanding the Femtofarad (fF)
Femtofarad is 1e-15 farad units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many femtofarads are in 1 attofarad?
1 attofarad equals 0.001 femtofarads, using the exact defined conversion factor rather than an estimate.
How do I convert attofarad to femtofarad?
Multiply the attofarad value by 0.001. The converter above does this instantly to whatever precision you set.
How do I convert femtofarad back to attofarad?
Use the reverse factor: 1 femtofarad equals 1,000 attofarads. You can also use the swap control in the converter above to flip the direction instantly.
What is a attofarad?
Attofarad (aF) is a unit of electricity.
What is a femtofarad?
Femtofarad (fF) is a unit of electricity.
Is the attofarad to femtofarad conversion exact?
Yes. Both attofarad and femtofarad are defined by fixed standards rather than physical artifacts, so the factor of 0.001 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.