Gigaampere is 1000000000 ampere units.
Gigaamperes to Picoamperes Converter — GA to pA
Convert Gigaampere (GA) to Picoampere (pA) using the exact conversion factor (1 gigaampere = 1e+21 picoampere). See the formula, worked examples, and conversion table.
Gigaamperes to Picoamperes 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.
Picoampere is 1e-12 ampere units.
Result = input x 1e+9 / 1e-12.
Electrical units in the same family convert directly.
Reserved above the conversion cards and below the converter.
About Converting Gigaamperes to Picoamperes
Gigaampere and Picoampere 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: Gigaampere is 1000000000 ampere units, and picoampere is 1e-12 ampere units.
Formula
picoamperes = gigaamperes × 1e+21
This factor comes from each unit's defined relationship to the category's base unit: 1 gigaampere equals 1000000000 base units, and 1 picoampere equals 1e-12 base units, so dividing one by the other gives the direct gigaampere-to-picoampere factor of 1e+21.
Simple example
1 GA × 1e+21 = 1e+21 pA
1 gigaampere = 1e+21 picoamperes.
Real-world example
120 GA × 1e+21 = 1.2e+23 pA
120 gigaamperes = 1.2e+23 picoamperes.
Conversion table
| Gigaampere (GA) | Picoampere (pA) |
|---|---|
| 1 GA | 1e+21 pA |
| 5 GA | 5e+21 pA |
| 12 GA | 1.2e+22 pA |
| 24 GA | 2.4e+22 pA |
| 120 GA | 1.2e+23 pA |
| 240 GA | 2.4e+23 pA |
Reverse conversion: Picoampere to Gigaampere
1e+21 pA × 1e-21 = 1 GA
1e+21 picoamperes = 1 gigaampere.
gigaamperes = picoamperes × 1e-21
For a page dedicated to this direction, see Picoampere to Gigaampere.
Understanding the Gigaampere (GA)
Gigaampere is 1000000000 ampere units.
Understanding the Picoampere (pA)
Picoampere is 1e-12 ampere units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many picoamperes are in 1 gigaampere?
1 gigaampere equals 1e+21 picoamperes, using the exact defined conversion factor rather than an estimate.
How do I convert gigaampere to picoampere?
Multiply the gigaampere value by 1e+21. The converter above does this instantly to whatever precision you set.
How do I convert picoampere back to gigaampere?
Use the reverse factor: 1 picoampere equals 1e-21 gigaamperes. You can also use the swap control in the converter above to flip the direction instantly.
What is a gigaampere?
Gigaampere (GA) is a unit of electricity.
What is a picoampere?
Picoampere (pA) is a unit of electricity.
Is the gigaampere to picoampere conversion exact?
Yes. Both gigaampere and picoampere are defined by fixed standards rather than physical artifacts, so the factor of 1e+21 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.