Femtoohm is 1e-15 ohm units.
Femtoohms to Attoohms Converter — fOhm to aOhm
Convert Femtoohm (fOhm) to Attoohm (aOhm) using the exact conversion factor (1 femtoohm = 1,000 attoohm). See the formula, worked examples, and conversion table.
Femtoohms to Attoohms 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.
Attoohm is 1e-18 ohm units.
Result = input x 1e-15 / 1e-18.
Electrical units in the same family convert directly.
Reserved above the conversion cards and below the converter.
About Converting Femtoohms to Attoohms
Femtoohm and Attoohm 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: Femtoohm is 1e-15 ohm units, and attoohm is 1e-18 ohm units.
Formula
attoohms = femtoohms × 1000
This factor comes from each unit's defined relationship to the category's base unit: 1 femtoohm equals 1e-15 base units, and 1 attoohm equals 1e-18 base units, so dividing one by the other gives the direct femtoohm-to-attoohm factor of 1000.
Simple example
1 fOhm × 1000 = 1,000 aOhm
1 femtoohm = 1,000 attoohms.
Real-world example
120 fOhm × 1000 = 120,000 aOhm
120 femtoohms = 120,000 attoohms.
Conversion table
| Femtoohm (fOhm) | Attoohm (aOhm) |
|---|---|
| 1 fOhm | 1,000 aOhm |
| 5 fOhm | 5,000 aOhm |
| 12 fOhm | 12,000 aOhm |
| 24 fOhm | 24,000 aOhm |
| 120 fOhm | 120,000 aOhm |
| 240 fOhm | 240,000 aOhm |
Reverse conversion: Attoohm to Femtoohm
1 aOhm × 0.001 = 0.001 fOhm
1 attoohm = 0.001 femtoohms.
femtoohms = attoohms × 0.001
For a page dedicated to this direction, see Attoohm to Femtoohm.
Understanding the Femtoohm (fOhm)
Femtoohm is 1e-15 ohm units.
Understanding the Attoohm (aOhm)
Attoohm is 1e-18 ohm units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many attoohms are in 1 femtoohm?
1 femtoohm equals 1,000 attoohms, using the exact defined conversion factor rather than an estimate.
How do I convert femtoohm to attoohm?
Multiply the femtoohm value by 1000. The converter above does this instantly to whatever precision you set.
How do I convert attoohm back to femtoohm?
Use the reverse factor: 1 attoohm equals 0.001 femtoohms. You can also use the swap control in the converter above to flip the direction instantly.
What is a femtoohm?
Femtoohm (fOhm) is a unit of electricity.
What is a attoohm?
Attoohm (aOhm) is a unit of electricity.
Is the femtoohm to attoohm conversion exact?
Yes. Both femtoohm and attoohm are defined by fixed standards rather than physical artifacts, so the factor of 1000 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.