Femtovolt is 1e-15 volt units.
Femtovolts to Millivolts Converter — fV to mV
Convert Femtovolt (fV) to Millivolt (mV) using the exact conversion factor (1 femtovolt = 1e-12 millivolt). See the formula, worked examples, and conversion table.
Femtovolts to Millivolts 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.
Millivolt is 0.001 volt units.
Result = input x 1e-15 / 0.001.
Electrical units in the same family convert directly.
Reserved above the conversion cards and below the converter.
About Converting Femtovolts to Millivolts
Femtovolt and Millivolt 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 millivolt is 0.001 volt units.
Formula
millivolts = femtovolts × 1e-12
This factor comes from each unit's defined relationship to the category's base unit: 1 femtovolt equals 1e-15 base units, and 1 millivolt equals 0.001 base units, so dividing one by the other gives the direct femtovolt-to-millivolt factor of 1e-12.
Simple example
1 fV × 1e-12 = 1e-12 mV
1 femtovolt = 1e-12 millivolts.
Real-world example
120 fV × 1e-12 = 1.2e-10 mV
120 femtovolts = 1.2e-10 millivolts.
Conversion table
| Femtovolt (fV) | Millivolt (mV) |
|---|---|
| 1 fV | 1e-12 mV |
| 5 fV | 5e-12 mV |
| 12 fV | 1.2e-11 mV |
| 24 fV | 2.4e-11 mV |
| 120 fV | 1.2e-10 mV |
| 240 fV | 2.4e-10 mV |
Reverse conversion: Millivolt to Femtovolt
1e-12 mV × 1e+12 = 1 fV
1e-12 millivolts = 1 femtovolt.
femtovolts = millivolts × 1e+12
For a page dedicated to this direction, see Millivolt to Femtovolt.
Understanding the Femtovolt (fV)
Femtovolt is 1e-15 volt units.
Understanding the Millivolt (mV)
Millivolt is 0.001 volt units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many millivolts are in 1 femtovolt?
1 femtovolt equals 1e-12 millivolts, using the exact defined conversion factor rather than an estimate.
How do I convert femtovolt to millivolt?
Multiply the femtovolt value by 1e-12. The converter above does this instantly to whatever precision you set.
How do I convert millivolt back to femtovolt?
Use the reverse factor: 1 millivolt equals 1e+12 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 millivolt?
Millivolt (mV) is a unit of electricity.
Is the femtovolt to millivolt conversion exact?
Yes. Both femtovolt and millivolt are defined by fixed standards rather than physical artifacts, so the factor of 1e-12 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.