Zeptovolt is 1e-21 volt units.
Zeptovolts to Femtovolts Converter — zV to fV
Convert Zeptovolt (zV) to Femtovolt (fV) using the exact conversion factor (1 zeptovolt = 1e-6 femtovolt). See the formula, worked examples, and conversion table.
Zeptovolts to Femtovolts 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.
Femtovolt is 1e-15 volt units.
Result = input x 1e-21 / 1e-15.
Electrical units in the same family convert directly.
Reserved above the conversion cards and below the converter.
About Converting Zeptovolts to Femtovolts
Zeptovolt and Femtovolt 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 femtovolt is 1e-15 volt units.
Formula
femtovolts = zeptovolts × 1e-6
This factor comes from each unit's defined relationship to the category's base unit: 1 zeptovolt equals 1e-21 base units, and 1 femtovolt equals 1e-15 base units, so dividing one by the other gives the direct zeptovolt-to-femtovolt factor of 1e-6.
Simple example
1 zV × 1e-6 = 1e-6 fV
1 zeptovolt = 1e-6 femtovolts.
Real-world example
120 zV × 1e-6 = 0.00012 fV
120 zeptovolts = 0.00012 femtovolts.
Conversion table
| Zeptovolt (zV) | Femtovolt (fV) |
|---|---|
| 1 zV | 1e-6 fV |
| 5 zV | 0.000005 fV |
| 12 zV | 0.000012 fV |
| 24 zV | 0.000024 fV |
| 120 zV | 0.00012 fV |
| 240 zV | 0.00024 fV |
Reverse conversion: Femtovolt to Zeptovolt
0.000001 fV × 1000000 = 1 zV
0.000001 femtovolts = 1 zeptovolts.
zeptovolts = femtovolts × 1000000
For a page dedicated to this direction, see Femtovolt to Zeptovolt.
Understanding the Zeptovolt (zV)
Zeptovolt is 1e-21 volt units.
Understanding the Femtovolt (fV)
Femtovolt is 1e-15 volt units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many femtovolts are in 1 zeptovolt?
1 zeptovolt equals 1e-6 femtovolts, using the exact defined conversion factor rather than an estimate.
How do I convert zeptovolt to femtovolt?
Multiply the zeptovolt value by 1e-6. The converter above does this instantly to whatever precision you set.
How do I convert femtovolt back to zeptovolt?
Use the reverse factor: 1 femtovolt equals 1,000,000 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 femtovolt?
Femtovolt (fV) is a unit of electricity.
Is the zeptovolt to femtovolt conversion exact?
Yes. Both zeptovolt and femtovolt are defined by fixed standards rather than physical artifacts, so the factor of 1e-6 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.