Attocoulomb is 1e-18 coulomb units.
Attocoulombs to Femtocoulombs Converter — aC to fC
Convert Attocoulomb (aC) to Femtocoulomb (fC) using the exact conversion factor (1 attocoulomb = 0.001 femtocoulomb). See the formula, worked examples, and conversion table.
Attocoulombs to Femtocoulombs 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.
Femtocoulomb is 1e-15 coulomb 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 Attocoulombs to Femtocoulombs
Attocoulomb and Femtocoulomb 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: Attocoulomb is 1e-18 coulomb units, and femtocoulomb is 1e-15 coulomb units.
Formula
femtocoulombs = attocoulombs × 0.001
This factor comes from each unit's defined relationship to the category's base unit: 1 attocoulomb equals 1e-18 base units, and 1 femtocoulomb equals 1e-15 base units, so dividing one by the other gives the direct attocoulomb-to-femtocoulomb factor of 0.001.
Simple example
1 aC × 0.001 = 0.001 fC
1 attocoulomb = 0.001 femtocoulombs.
Real-world example
120 aC × 0.001 = 0.12 fC
120 attocoulombs = 0.12 femtocoulombs.
Conversion table
| Attocoulomb (aC) | Femtocoulomb (fC) |
|---|---|
| 1 aC | 0.001 fC |
| 5 aC | 0.005 fC |
| 12 aC | 0.012 fC |
| 24 aC | 0.024 fC |
| 120 aC | 0.12 fC |
| 240 aC | 0.24 fC |
Reverse conversion: Femtocoulomb to Attocoulomb
0.001 fC × 1000 = 1 aC
0.001 femtocoulombs = 1 attocoulomb.
attocoulombs = femtocoulombs × 1000
For a page dedicated to this direction, see Femtocoulomb to Attocoulomb.
Understanding the Attocoulomb (aC)
Attocoulomb is 1e-18 coulomb units.
Understanding the Femtocoulomb (fC)
Femtocoulomb is 1e-15 coulomb units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many femtocoulombs are in 1 attocoulomb?
1 attocoulomb equals 0.001 femtocoulombs, using the exact defined conversion factor rather than an estimate.
How do I convert attocoulomb to femtocoulomb?
Multiply the attocoulomb value by 0.001. The converter above does this instantly to whatever precision you set.
How do I convert femtocoulomb back to attocoulomb?
Use the reverse factor: 1 femtocoulomb equals 1,000 attocoulombs. You can also use the swap control in the converter above to flip the direction instantly.
What is a attocoulomb?
Attocoulomb (aC) is a unit of electricity.
What is a femtocoulomb?
Femtocoulomb (fC) is a unit of electricity.
Is the attocoulomb to femtocoulomb conversion exact?
Yes. Both attocoulomb and femtocoulomb 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.