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