Femtoampere is 1e-15 ampere units.
Femtoamperes to Teraamperes Converter — fA to TA
Convert Femtoampere (fA) to Teraampere (TA) using the exact conversion factor (1 femtoampere = 1e-27 teraampere). See the formula, worked examples, and conversion table.
Femtoamperes to Teraamperes 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.
Teraampere is 1000000000000 ampere units.
Result = input x 1e-15 / 1e+12.
Electrical units in the same family convert directly.
Reserved above the conversion cards and below the converter.
About Converting Femtoamperes to Teraamperes
Femtoampere and Teraampere 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 teraampere is 1000000000000 ampere units.
Formula
teraamperes = femtoamperes × 1e-27
This factor comes from each unit's defined relationship to the category's base unit: 1 femtoampere equals 1e-15 base units, and 1 teraampere equals 1e+12 base units, so dividing one by the other gives the direct femtoampere-to-teraampere factor of 1e-27.
Simple example
1 fA × 1e-27 = 1e-27 TA
1 femtoampere = 1e-27 teraamperes.
Real-world example
120 fA × 1e-27 = 1.2e-25 TA
120 femtoamperes = 1.2e-25 teraamperes.
Conversion table
| Femtoampere (fA) | Teraampere (TA) |
|---|---|
| 1 fA | 1e-27 TA |
| 5 fA | 5e-27 TA |
| 12 fA | 1.2e-26 TA |
| 24 fA | 2.4e-26 TA |
| 120 fA | 1.2e-25 TA |
| 240 fA | 2.4e-25 TA |
Reverse conversion: Teraampere to Femtoampere
1e-27 TA × 1e+27 = 1 fA
1e-27 teraamperes = 1 femtoampere.
femtoamperes = teraamperes × 1e+27
For a page dedicated to this direction, see Teraampere to Femtoampere.
Understanding the Femtoampere (fA)
Femtoampere is 1e-15 ampere units.
Understanding the Teraampere (TA)
Teraampere is 1000000000000 ampere units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many teraamperes are in 1 femtoampere?
1 femtoampere equals 1e-27 teraamperes, using the exact defined conversion factor rather than an estimate.
How do I convert femtoampere to teraampere?
Multiply the femtoampere value by 1e-27. The converter above does this instantly to whatever precision you set.
How do I convert teraampere back to femtoampere?
Use the reverse factor: 1 teraampere equals 1e+27 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 teraampere?
Teraampere (TA) is a unit of electricity.
Is the femtoampere to teraampere conversion exact?
Yes. Both femtoampere and teraampere are defined by fixed standards rather than physical artifacts, so the factor of 1e-27 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.