Megaohm is 1000000 ohm units.
Megaohms to Femtoohms Converter — MOhm to fOhm
Convert Megaohm (MOhm) to Femtoohm (fOhm) using the exact conversion factor (1 megaohm = 1e+21 femtoohm). See the formula, worked examples, and conversion table.
Megaohms 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+6 / 1e-15.
Electrical units in the same family convert directly.
Reserved above the conversion cards and below the converter.
About Converting Megaohms to Femtoohms
Megaohm 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: Megaohm is 1000000 ohm units, and femtoohm is 1e-15 ohm units.
Formula
femtoohms = megaohms × 1e+21
This factor comes from each unit's defined relationship to the category's base unit: 1 megaohm equals 1000000 base units, and 1 femtoohm equals 1e-15 base units, so dividing one by the other gives the direct megaohm-to-femtoohm factor of 1e+21.
Simple example
1 MOhm × 1e+21 = 1e+21 fOhm
1 megaohm = 1e+21 femtoohms.
Real-world example
120 MOhm × 1e+21 = 1.2e+23 fOhm
120 megaohms = 1.2e+23 femtoohms.
Conversion table
| Megaohm (MOhm) | Femtoohm (fOhm) |
|---|---|
| 1 MOhm | 1e+21 fOhm |
| 5 MOhm | 5e+21 fOhm |
| 12 MOhm | 1.2e+22 fOhm |
| 24 MOhm | 2.4e+22 fOhm |
| 120 MOhm | 1.2e+23 fOhm |
| 240 MOhm | 2.4e+23 fOhm |
Reverse conversion: Femtoohm to Megaohm
1e+21 fOhm × 1e-21 = 1 MOhm
1e+21 femtoohms = 1 megaohms.
megaohms = femtoohms × 1e-21
For a page dedicated to this direction, see Femtoohm to Megaohm.
Understanding the Megaohm (MOhm)
Megaohm is 1000000 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 megaohm?
1 megaohm equals 1e+21 femtoohms, using the exact defined conversion factor rather than an estimate.
How do I convert megaohm to femtoohm?
Multiply the megaohm value by 1e+21. The converter above does this instantly to whatever precision you set.
How do I convert femtoohm back to megaohm?
Use the reverse factor: 1 femtoohm equals 1e-21 megaohms. You can also use the swap control in the converter above to flip the direction instantly.
What is a megaohm?
Megaohm (MOhm) is a unit of electricity.
What is a femtoohm?
Femtoohm (fOhm) is a unit of electricity.
Is the megaohm to femtoohm conversion exact?
Yes. Both megaohm and femtoohm are defined by fixed standards rather than physical artifacts, so the factor of 1e+21 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.