Attoampere is 1e-18 ampere units.
Attoamperes to Zeptoamperes Converter — aA to zA
Convert Attoampere (aA) to Zeptoampere (zA) using the exact conversion factor (1 attoampere = 1,000 zeptoampere). See the formula, worked examples, and conversion table.
Attoamperes 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-18 / 1e-21.
Electrical units in the same family convert directly.
Reserved above the conversion cards and below the converter.
About Converting Attoamperes to Zeptoamperes
Attoampere 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: Attoampere is 1e-18 ampere units, and zeptoampere is 1e-21 ampere units.
Formula
zeptoamperes = attoamperes × 1000
This factor comes from each unit's defined relationship to the category's base unit: 1 attoampere equals 1e-18 base units, and 1 zeptoampere equals 1e-21 base units, so dividing one by the other gives the direct attoampere-to-zeptoampere factor of 1000.
Simple example
1 aA × 1000 = 1,000 zA
1 attoampere = 1,000 zeptoamperes.
Real-world example
120 aA × 1000 = 120,000 zA
120 attoamperes = 120,000 zeptoamperes.
Conversion table
| Attoampere (aA) | Zeptoampere (zA) |
|---|---|
| 1 aA | 1,000 zA |
| 5 aA | 5,000 zA |
| 12 aA | 12,000 zA |
| 24 aA | 24,000 zA |
| 120 aA | 120,000 zA |
| 240 aA | 240,000 zA |
Reverse conversion: Zeptoampere to Attoampere
1 zA × 0.001 = 0.001 aA
1 zeptoampere = 0.001 attoamperes.
attoamperes = zeptoamperes × 0.001
For a page dedicated to this direction, see Zeptoampere to Attoampere.
Understanding the Attoampere (aA)
Attoampere is 1e-18 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 attoampere?
1 attoampere equals 1,000 zeptoamperes, using the exact defined conversion factor rather than an estimate.
How do I convert attoampere to zeptoampere?
Multiply the attoampere value by 1000. The converter above does this instantly to whatever precision you set.
How do I convert zeptoampere back to attoampere?
Use the reverse factor: 1 zeptoampere equals 0.001 attoamperes. You can also use the swap control in the converter above to flip the direction instantly.
What is a attoampere?
Attoampere (aA) is a unit of electricity.
What is a zeptoampere?
Zeptoampere (zA) is a unit of electricity.
Is the attoampere to zeptoampere conversion exact?
Yes. Both attoampere and zeptoampere 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.