Rontowatt is 1e-27 watt units.
Rontowatts to Yoctowatts Converter — rW to yW
Convert Rontowatt (rW) to Yoctowatt (yW) using the exact conversion factor (1 rontowatt = 0.001 yoctowatt). See the formula, worked examples, and conversion table.
Rontowatts to Yoctowatts 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.
Yoctowatt is 1e-24 watt units.
Result = input x 1e-27 / 1e-24.
Electrical units in the same family convert directly.
Reserved above the conversion cards and below the converter.
About Converting Rontowatts to Yoctowatts
Rontowatt and Yoctowatt 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: Rontowatt is 1e-27 watt units, and yoctowatt is 1e-24 watt units.
Formula
yoctowatts = rontowatts × 0.001
This factor comes from each unit's defined relationship to the category's base unit: 1 rontowatt equals 1e-27 base units, and 1 yoctowatt equals 1e-24 base units, so dividing one by the other gives the direct rontowatt-to-yoctowatt factor of 0.001.
Simple example
1 rW × 0.001 = 0.001 yW
1 rontowatt = 0.001 yoctowatts.
Real-world example
120 rW × 0.001 = 0.12 yW
120 rontowatts = 0.12 yoctowatts.
Conversion table
| Rontowatt (rW) | Yoctowatt (yW) |
|---|---|
| 1 rW | 0.001 yW |
| 5 rW | 0.005 yW |
| 12 rW | 0.012 yW |
| 24 rW | 0.024 yW |
| 120 rW | 0.12 yW |
| 240 rW | 0.24 yW |
Reverse conversion: Yoctowatt to Rontowatt
0.001 yW × 1000 = 1 rW
0.001 yoctowatts = 1 rontowatts.
rontowatts = yoctowatts × 1000
For a page dedicated to this direction, see Yoctowatt to Rontowatt.
Understanding the Rontowatt (rW)
Rontowatt is 1e-27 watt units.
Understanding the Yoctowatt (yW)
Yoctowatt is 1e-24 watt units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many yoctowatts are in 1 rontowatt?
1 rontowatt equals 0.001 yoctowatts, using the exact defined conversion factor rather than an estimate.
How do I convert rontowatt to yoctowatt?
Multiply the rontowatt value by 0.001. The converter above does this instantly to whatever precision you set.
How do I convert yoctowatt back to rontowatt?
Use the reverse factor: 1 yoctowatt equals 1,000 rontowatts. You can also use the swap control in the converter above to flip the direction instantly.
What is a rontowatt?
Rontowatt (rW) is a unit of electricity.
What is a yoctowatt?
Yoctowatt (yW) is a unit of electricity.
Is the rontowatt to yoctowatt conversion exact?
Yes. Both rontowatt and yoctowatt 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.