Yoctoohm is 1e-24 ohm units.
Yoctoohms to Milliohms Converter — yOhm to mOhm
Convert Yoctoohm (yOhm) to Milliohm (mOhm) using the exact conversion factor (1 yoctoohm = 1e-21 milliohm). See the formula, worked examples, and conversion table.
Yoctoohms to Milliohms 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.
Milliohm is 0.001 ohm units.
Result = input x 1e-24 / 0.001.
Electrical units in the same family convert directly.
Reserved above the conversion cards and below the converter.
About Converting Yoctoohms to Milliohms
Yoctoohm and Milliohm 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: Yoctoohm is 1e-24 ohm units, and milliohm is 0.001 ohm units.
Formula
milliohms = yoctoohms × 1e-21
This factor comes from each unit's defined relationship to the category's base unit: 1 yoctoohm equals 1e-24 base units, and 1 milliohm equals 0.001 base units, so dividing one by the other gives the direct yoctoohm-to-milliohm factor of 1e-21.
Simple example
1 yOhm × 1e-21 = 1e-21 mOhm
1 yoctoohm = 1e-21 milliohms.
Real-world example
120 yOhm × 1e-21 = 1.2e-19 mOhm
120 yoctoohms = 1.2e-19 milliohms.
Conversion table
| Yoctoohm (yOhm) | Milliohm (mOhm) |
|---|---|
| 1 yOhm | 1e-21 mOhm |
| 5 yOhm | 5e-21 mOhm |
| 12 yOhm | 1.2e-20 mOhm |
| 24 yOhm | 2.4e-20 mOhm |
| 120 yOhm | 1.2e-19 mOhm |
| 240 yOhm | 2.4e-19 mOhm |
Reverse conversion: Milliohm to Yoctoohm
1e-21 mOhm × 1e+21 = 1 yOhm
1e-21 milliohms = 1 yoctoohm.
yoctoohms = milliohms × 1e+21
For a page dedicated to this direction, see Milliohm to Yoctoohm.
Understanding the Yoctoohm (yOhm)
Yoctoohm is 1e-24 ohm units.
Understanding the Milliohm (mOhm)
Milliohm is 0.001 ohm units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many milliohms are in 1 yoctoohm?
1 yoctoohm equals 1e-21 milliohms, using the exact defined conversion factor rather than an estimate.
How do I convert yoctoohm to milliohm?
Multiply the yoctoohm value by 1e-21. The converter above does this instantly to whatever precision you set.
How do I convert milliohm back to yoctoohm?
Use the reverse factor: 1 milliohm equals 1e+21 yoctoohms. You can also use the swap control in the converter above to flip the direction instantly.
What is a yoctoohm?
Yoctoohm (yOhm) is a unit of electricity.
What is a milliohm?
Milliohm (mOhm) is a unit of electricity.
Is the yoctoohm to milliohm conversion exact?
Yes. Both yoctoohm and milliohm 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.