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