Attoohm is 1e-18 ohm units.
Attoohms to Femtoohms Converter — aOhm to fOhm
Convert Attoohm (aOhm) to Femtoohm (fOhm) using the exact conversion factor (1 attoohm = 0.001 femtoohm). See the formula, worked examples, and conversion table.
Attoohms to Femtoohms 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.
Femtoohm is 1e-15 ohm units.
Result = input x 1e-18 / 1e-15.
Electrical units in the same family convert directly.
Reserved above the conversion cards and below the converter.
About Converting Attoohms to Femtoohms
Attoohm and Femtoohm 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: Attoohm is 1e-18 ohm units, and femtoohm is 1e-15 ohm units.
Formula
femtoohms = attoohms × 0.001
This factor comes from each unit's defined relationship to the category's base unit: 1 attoohm equals 1e-18 base units, and 1 femtoohm equals 1e-15 base units, so dividing one by the other gives the direct attoohm-to-femtoohm factor of 0.001.
Simple example
1 aOhm × 0.001 = 0.001 fOhm
1 attoohm = 0.001 femtoohms.
Real-world example
120 aOhm × 0.001 = 0.12 fOhm
120 attoohms = 0.12 femtoohms.
Conversion table
| Attoohm (aOhm) | Femtoohm (fOhm) |
|---|---|
| 1 aOhm | 0.001 fOhm |
| 5 aOhm | 0.005 fOhm |
| 12 aOhm | 0.012 fOhm |
| 24 aOhm | 0.024 fOhm |
| 120 aOhm | 0.12 fOhm |
| 240 aOhm | 0.24 fOhm |
Reverse conversion: Femtoohm to Attoohm
0.001 fOhm × 1000 = 1 aOhm
0.001 femtoohms = 1 attoohm.
attoohms = femtoohms × 1000
For a page dedicated to this direction, see Femtoohm to Attoohm.
Understanding the Attoohm (aOhm)
Attoohm is 1e-18 ohm units.
Understanding the Femtoohm (fOhm)
Femtoohm is 1e-15 ohm units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many femtoohms are in 1 attoohm?
1 attoohm equals 0.001 femtoohms, using the exact defined conversion factor rather than an estimate.
How do I convert attoohm to femtoohm?
Multiply the attoohm value by 0.001. The converter above does this instantly to whatever precision you set.
How do I convert femtoohm back to attoohm?
Use the reverse factor: 1 femtoohm equals 1,000 attoohms. You can also use the swap control in the converter above to flip the direction instantly.
What is a attoohm?
Attoohm (aOhm) is a unit of electricity.
What is a femtoohm?
Femtoohm (fOhm) is a unit of electricity.
Is the attoohm to femtoohm conversion exact?
Yes. Both attoohm and femtoohm are defined by fixed standards rather than physical artifacts, so the factor of 0.001 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.