Femtoampere is 1e-15 ampere units.
Femtoamperes to Yoctoamperes Converter — fA to yA
Convert Femtoampere (fA) to Yoctoampere (yA) using the exact conversion factor (1 femtoampere = 1,000,000,000 yoctoampere). See the formula, worked examples, and conversion table.
Femtoamperes to Yoctoamperes 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.
Yoctoampere is 1e-24 ampere units.
Result = input x 1e-15 / 1e-24.
Electrical units in the same family convert directly.
Reserved above the conversion cards and below the converter.
About Converting Femtoamperes to Yoctoamperes
Femtoampere and Yoctoampere 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 yoctoampere is 1e-24 ampere units.
Formula
yoctoamperes = femtoamperes × 1000000000
This factor comes from each unit's defined relationship to the category's base unit: 1 femtoampere equals 1e-15 base units, and 1 yoctoampere equals 1e-24 base units, so dividing one by the other gives the direct femtoampere-to-yoctoampere factor of 1000000000.
Simple example
1 fA × 1000000000 = 1,000,000,000 yA
1 femtoampere = 1,000,000,000 yoctoamperes.
Real-world example
120 fA × 1000000000 = 120,000,000,000 yA
120 femtoamperes = 120,000,000,000 yoctoamperes.
Conversion table
| Femtoampere (fA) | Yoctoampere (yA) |
|---|---|
| 1 fA | 1,000,000,000 yA |
| 5 fA | 5,000,000,000 yA |
| 12 fA | 12,000,000,000 yA |
| 24 fA | 24,000,000,000 yA |
| 120 fA | 120,000,000,000 yA |
| 240 fA | 240,000,000,000 yA |
Reverse conversion: Yoctoampere to Femtoampere
1 yA × 1e-9 = 1e-9 fA
1 yoctoampere = 1e-9 femtoamperes.
femtoamperes = yoctoamperes × 1e-9
For a page dedicated to this direction, see Yoctoampere to Femtoampere.
Understanding the Femtoampere (fA)
Femtoampere is 1e-15 ampere units.
Understanding the Yoctoampere (yA)
Yoctoampere is 1e-24 ampere units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many yoctoamperes are in 1 femtoampere?
1 femtoampere equals 1,000,000,000 yoctoamperes, using the exact defined conversion factor rather than an estimate.
How do I convert femtoampere to yoctoampere?
Multiply the femtoampere value by 1000000000. The converter above does this instantly to whatever precision you set.
How do I convert yoctoampere back to femtoampere?
Use the reverse factor: 1 yoctoampere equals 1e-9 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 yoctoampere?
Yoctoampere (yA) is a unit of electricity.
Is the femtoampere to yoctoampere conversion exact?
Yes. Both femtoampere and yoctoampere are defined by fixed standards rather than physical artifacts, so the factor of 1000000000 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.