Rontofarad is 1e-27 farad units.
Rontofarads to Attofarads Converter — rF to aF
Convert Rontofarad (rF) to Attofarad (aF) using the exact conversion factor (1 rontofarad = 1e-9 attofarad). See the formula, worked examples, and conversion table.
Rontofarads 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-27 / 1e-18.
Electrical units in the same family convert directly.
Reserved above the conversion cards and below the converter.
About Converting Rontofarads to Attofarads
Rontofarad 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: Rontofarad is 1e-27 farad units, and attofarad is 1e-18 farad units.
Formula
attofarads = rontofarads × 1e-9
This factor comes from each unit's defined relationship to the category's base unit: 1 rontofarad equals 1e-27 base units, and 1 attofarad equals 1e-18 base units, so dividing one by the other gives the direct rontofarad-to-attofarad factor of 1e-9.
Simple example
1 rF × 1e-9 = 1e-9 aF
1 rontofarad = 1e-9 attofarads.
Real-world example
120 rF × 1e-9 = 1.2e-7 aF
120 rontofarads = 1.2e-7 attofarads.
Conversion table
| Rontofarad (rF) | Attofarad (aF) |
|---|---|
| 1 rF | 1e-9 aF |
| 5 rF | 5e-9 aF |
| 12 rF | 1.2e-8 aF |
| 24 rF | 2.4e-8 aF |
| 120 rF | 1.2e-7 aF |
| 240 rF | 2.4e-7 aF |
Reverse conversion: Attofarad to Rontofarad
1e-9 aF × 1000000000 = 1 rF
1e-9 attofarads = 1 rontofarads.
rontofarads = attofarads × 1000000000
For a page dedicated to this direction, see Attofarad to Rontofarad.
Understanding the Rontofarad (rF)
Rontofarad is 1e-27 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 rontofarad?
1 rontofarad equals 1e-9 attofarads, using the exact defined conversion factor rather than an estimate.
How do I convert rontofarad to attofarad?
Multiply the rontofarad value by 1e-9. The converter above does this instantly to whatever precision you set.
How do I convert attofarad back to rontofarad?
Use the reverse factor: 1 attofarad equals 1,000,000,000 rontofarads. You can also use the swap control in the converter above to flip the direction instantly.
What is a rontofarad?
Rontofarad (rF) is a unit of electricity.
What is a attofarad?
Attofarad (aF) is a unit of electricity.
Is the rontofarad to attofarad conversion exact?
Yes. Both rontofarad and attofarad are defined by fixed standards rather than physical artifacts, so the factor of 1e-9 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.