Zeptovolt is 1e-21 volt units.
Zeptovolts to Volts Converter — zV to V
Convert Zeptovolt (zV) to Volt (V) using the exact conversion factor (1 zeptovolt = 1e-21 volt). See the formula, worked examples, conversion table, history, and common uses.
Zeptovolts to Volts 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.
Volt is the SI unit of electric potential.
Result = input x 1e-21 / 1.
Electrical units in the same family convert directly.
Reserved above the conversion cards and below the converter.
About Converting Zeptovolts to Volts
Zeptovolt and Volt 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: Zeptovolt is 1e-21 volt units, and volt is the SI unit of electric potential.
Formula
volts = zeptovolts × 1e-21
This factor comes from each unit's defined relationship to the category's base unit: 1 zeptovolt equals 1e-21 base units, and 1 volt equals 1 base unit, so dividing one by the other gives the direct zeptovolt-to-volt factor of 1e-21.
Simple example
1 zV × 1e-21 = 1e-21 V
1 zeptovolt = 1e-21 volts.
Real-world example
120 zV × 1e-21 = 1.2e-19 V
120 zeptovolts = 1.2e-19 volts.
Conversion table
| Zeptovolt (zV) | Volt (V) |
|---|---|
| 1 zV | 1e-21 V |
| 5 zV | 5e-21 V |
| 12 zV | 1.2e-20 V |
| 24 zV | 2.4e-20 V |
| 120 zV | 1.2e-19 V |
| 240 zV | 2.4e-19 V |
Reverse conversion: Volt to Zeptovolt
1e-21 V × 1e+21 = 1 zV
1e-21 volts = 1 zeptovolt.
zeptovolts = volts × 1e+21
For a page dedicated to this direction, see Volt to Zeptovolt.
Understanding the Zeptovolt (zV)
Zeptovolt is 1e-21 volt units.
Understanding the Volt
Volt (V) measures electric potential. The SI derived unit of electric potential difference, equal to one joule of energy per coulomb of charge. It is classified as a SI derived unit.
Where it's used: Universal — SI derived unit used worldwide
Uses of the Volt today
- Household and automotive electrical system ratings (120V/240V mains, 12V/24V batteries)
- Battery and power-supply specifications
- Electronics design
History of the Volt
The volt is named after Alessandro Volta (1745–1827), an Italian physicist who invented the voltaic pile in 1800 — the first device able to produce a steady electric current, and the direct ancestor of the modern battery.
Historical origin. Volt was not the invention of a single named person; it developed through the process described above.
Volt — sources
- BIPM SI Brochure, 9th edition — Definition of the volt as a coherent SI derived unit.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many volts are in 1 zeptovolt?
1 zeptovolt equals 1e-21 volts, using the exact defined conversion factor rather than an estimate.
How do I convert zeptovolt to volt?
Multiply the zeptovolt value by 1e-21. The converter above does this instantly to whatever precision you set.
How do I convert volt back to zeptovolt?
Use the reverse factor: 1 volt equals 1e+21 zeptovolts. You can also use the swap control in the converter above to flip the direction instantly.
What is a zeptovolt?
Zeptovolt (zV) is a unit of electricity.
What is a volt?
Volt (V) measures electric potential. The SI derived unit of electric potential difference, equal to one joule of energy per coulomb of charge. It is classified as a SI derived unit.
Is the zeptovolt to volt conversion exact?
Yes. Both zeptovolt and volt 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.