Picoampere is 1e-12 ampere units.
Picoamperes to Zeptoamperes Converter — pA to zA
Convert Picoampere (pA) to Zeptoampere (zA) using the exact conversion factor (1 picoampere = 1,000,000,000 zeptoampere). See the formula, worked examples, and conversion table.
Picoamperes to Zeptoamperes 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.
Zeptoampere is 1e-21 ampere units.
Result = input x 1e-12 / 1e-21.
Electrical units in the same family convert directly.
Reserved above the conversion cards and below the converter.
About Converting Picoamperes to Zeptoamperes
Picoampere and Zeptoampere 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: Picoampere is 1e-12 ampere units, and zeptoampere is 1e-21 ampere units.
Formula
zeptoamperes = picoamperes × 1000000000
This factor comes from each unit's defined relationship to the category's base unit: 1 picoampere equals 1e-12 base units, and 1 zeptoampere equals 1e-21 base units, so dividing one by the other gives the direct picoampere-to-zeptoampere factor of 1000000000.
Simple example
1 pA × 1000000000 = 1,000,000,000 zA
1 picoampere = 1,000,000,000 zeptoamperes.
Real-world example
120 pA × 1000000000 = 120,000,000,000 zA
120 picoamperes = 120,000,000,000 zeptoamperes.
Conversion table
| Picoampere (pA) | Zeptoampere (zA) |
|---|---|
| 1 pA | 1,000,000,000 zA |
| 5 pA | 5,000,000,000 zA |
| 12 pA | 12,000,000,000 zA |
| 24 pA | 24,000,000,000 zA |
| 120 pA | 120,000,000,000 zA |
| 240 pA | 240,000,000,000 zA |
Reverse conversion: Zeptoampere to Picoampere
1 zA × 1e-9 = 1e-9 pA
1 zeptoampere = 1e-9 picoamperes.
picoamperes = zeptoamperes × 1e-9
For a page dedicated to this direction, see Zeptoampere to Picoampere.
Understanding the Picoampere (pA)
Picoampere is 1e-12 ampere units.
Understanding the Zeptoampere (zA)
Zeptoampere is 1e-21 ampere units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many zeptoamperes are in 1 picoampere?
1 picoampere equals 1,000,000,000 zeptoamperes, using the exact defined conversion factor rather than an estimate.
How do I convert picoampere to zeptoampere?
Multiply the picoampere value by 1000000000. The converter above does this instantly to whatever precision you set.
How do I convert zeptoampere back to picoampere?
Use the reverse factor: 1 zeptoampere equals 1e-9 picoamperes. You can also use the swap control in the converter above to flip the direction instantly.
What is a picoampere?
Picoampere (pA) is a unit of electricity.
What is a zeptoampere?
Zeptoampere (zA) is a unit of electricity.
Is the picoampere to zeptoampere conversion exact?
Yes. Both picoampere and zeptoampere 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.