Kilovolt is 1000 volt units.
Kilovolts to Femtovolts Converter — kV to fV
Convert Kilovolt (kV) to Femtovolt (fV) using the exact conversion factor (1 kilovolt = 1e+18 femtovolt). See the formula, worked examples, and conversion table.
Kilovolts 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 1000 / 1e-15.
Electrical units in the same family convert directly.
Reserved above the conversion cards and below the converter.
About Converting Kilovolts to Femtovolts
Kilovolt 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: Kilovolt is 1000 volt units, and femtovolt is 1e-15 volt units.
Formula
femtovolts = kilovolts × 1e+18
This factor comes from each unit's defined relationship to the category's base unit: 1 kilovolt equals 1000 base units, and 1 femtovolt equals 1e-15 base units, so dividing one by the other gives the direct kilovolt-to-femtovolt factor of 1e+18.
Simple example
1 kV × 1e+18 = 1e+18 fV
1 kilovolt = 1e+18 femtovolts.
Real-world example
120 kV × 1e+18 = 1.2e+20 fV
120 kilovolts = 1.2e+20 femtovolts.
Conversion table
| Kilovolt (kV) | Femtovolt (fV) |
|---|---|
| 1 kV | 1e+18 fV |
| 5 kV | 5e+18 fV |
| 12 kV | 1.2e+19 fV |
| 24 kV | 2.4e+19 fV |
| 120 kV | 1.2e+20 fV |
| 240 kV | 2.4e+20 fV |
Reverse conversion: Femtovolt to Kilovolt
1e+18 fV × 1e-18 = 1 kV
1e+18 femtovolts = 1 kilovolts.
kilovolts = femtovolts × 1e-18
For a page dedicated to this direction, see Femtovolt to Kilovolt.
Understanding the Kilovolt (kV)
Kilovolt is 1000 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 kilovolt?
1 kilovolt equals 1e+18 femtovolts, using the exact defined conversion factor rather than an estimate.
How do I convert kilovolt to femtovolt?
Multiply the kilovolt value by 1e+18. The converter above does this instantly to whatever precision you set.
How do I convert femtovolt back to kilovolt?
Use the reverse factor: 1 femtovolt equals 1e-18 kilovolts. You can also use the swap control in the converter above to flip the direction instantly.
What is a kilovolt?
Kilovolt (kV) is a unit of electricity.
What is a femtovolt?
Femtovolt (fV) is a unit of electricity.
Is the kilovolt to femtovolt conversion exact?
Yes. Both kilovolt and femtovolt are defined by fixed standards rather than physical artifacts, so the factor of 1e+18 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.