Femtovolt is 1e-15 volt units.
Femtovolts to Zeptovolts Converter — fV to zV
Convert Femtovolt (fV) to Zeptovolt (zV) using the exact conversion factor (1 femtovolt = 1,000,000 zeptovolt). See the formula, worked examples, and conversion table.
Femtovolts to Zeptovolts 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.
Zeptovolt is 1e-21 volt units.
Result = input x 1e-15 / 1e-21.
Electrical units in the same family convert directly.
Reserved above the conversion cards and below the converter.
About Converting Femtovolts to Zeptovolts
Femtovolt and Zeptovolt 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: Femtovolt is 1e-15 volt units, and zeptovolt is 1e-21 volt units.
Formula
zeptovolts = femtovolts × 1000000
This factor comes from each unit's defined relationship to the category's base unit: 1 femtovolt equals 1e-15 base units, and 1 zeptovolt equals 1e-21 base units, so dividing one by the other gives the direct femtovolt-to-zeptovolt factor of 1000000.
Simple example
1 fV × 1000000 = 1,000,000 zV
1 femtovolt = 1,000,000 zeptovolts.
Real-world example
120 fV × 1000000 = 120,000,000 zV
120 femtovolts = 120,000,000 zeptovolts.
Conversion table
| Femtovolt (fV) | Zeptovolt (zV) |
|---|---|
| 1 fV | 1,000,000 zV |
| 5 fV | 5,000,000 zV |
| 12 fV | 12,000,000 zV |
| 24 fV | 24,000,000 zV |
| 120 fV | 120,000,000 zV |
| 240 fV | 240,000,000 zV |
Reverse conversion: Zeptovolt to Femtovolt
1 zV × 1e-6 = 1e-6 fV
1 zeptovolt = 1e-6 femtovolts.
femtovolts = zeptovolts × 1e-6
For a page dedicated to this direction, see Zeptovolt to Femtovolt.
Understanding the Femtovolt (fV)
Femtovolt is 1e-15 volt units.
Understanding the Zeptovolt (zV)
Zeptovolt is 1e-21 volt units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many zeptovolts are in 1 femtovolt?
1 femtovolt equals 1,000,000 zeptovolts, using the exact defined conversion factor rather than an estimate.
How do I convert femtovolt to zeptovolt?
Multiply the femtovolt value by 1000000. The converter above does this instantly to whatever precision you set.
How do I convert zeptovolt back to femtovolt?
Use the reverse factor: 1 zeptovolt equals 1e-6 femtovolts. You can also use the swap control in the converter above to flip the direction instantly.
What is a femtovolt?
Femtovolt (fV) is a unit of electricity.
What is a zeptovolt?
Zeptovolt (zV) is a unit of electricity.
Is the femtovolt to zeptovolt conversion exact?
Yes. Both femtovolt and zeptovolt are defined by fixed standards rather than physical artifacts, so the factor of 1000000 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.