Hectofarad is 100 farad units.
Hectofarads to Attofarads Converter — hF to aF
Convert Hectofarad (hF) to Attofarad (aF) using the exact conversion factor (1 hectofarad = 1e+20 attofarad). See the formula, worked examples, and conversion table.
Hectofarads 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 100 / 1e-18.
Electrical units in the same family convert directly.
Reserved above the conversion cards and below the converter.
About Converting Hectofarads to Attofarads
Hectofarad 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: Hectofarad is 100 farad units, and attofarad is 1e-18 farad units.
Formula
attofarads = hectofarads × 1e+20
This factor comes from each unit's defined relationship to the category's base unit: 1 hectofarad equals 100 base units, and 1 attofarad equals 1e-18 base units, so dividing one by the other gives the direct hectofarad-to-attofarad factor of 1e+20.
Simple example
1 hF × 1e+20 = 1e+20 aF
1 hectofarad = 1e+20 attofarads.
Real-world example
120 hF × 1e+20 = 1.2e+22 aF
120 hectofarads = 1.2e+22 attofarads.
Conversion table
| Hectofarad (hF) | Attofarad (aF) |
|---|---|
| 1 hF | 1e+20 aF |
| 5 hF | 5e+20 aF |
| 12 hF | 1.2e+21 aF |
| 24 hF | 2.4e+21 aF |
| 120 hF | 1.2e+22 aF |
| 240 hF | 2.4e+22 aF |
Reverse conversion: Attofarad to Hectofarad
1e+20 aF × 1e-20 = 1 hF
1e+20 attofarads = 1 hectofarads.
hectofarads = attofarads × 1e-20
For a page dedicated to this direction, see Attofarad to Hectofarad.
Understanding the Hectofarad (hF)
Hectofarad is 100 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 hectofarad?
1 hectofarad equals 1e+20 attofarads, using the exact defined conversion factor rather than an estimate.
How do I convert hectofarad to attofarad?
Multiply the hectofarad value by 1e+20. The converter above does this instantly to whatever precision you set.
How do I convert attofarad back to hectofarad?
Use the reverse factor: 1 attofarad equals 1e-20 hectofarads. You can also use the swap control in the converter above to flip the direction instantly.
What is a hectofarad?
Hectofarad (hF) is a unit of electricity.
What is a attofarad?
Attofarad (aF) is a unit of electricity.
Is the hectofarad to attofarad conversion exact?
Yes. Both hectofarad and attofarad are defined by fixed standards rather than physical artifacts, so the factor of 1e+20 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.