Centiohm is 0.01 ohm units.
Centiohms to Ronnaohms Converter — cOhm to ROhm
Convert Centiohm (cOhm) to Ronnaohm (ROhm) using the exact conversion factor (1 centiohm = 1e-29 ronnaohm). See the formula, worked examples, and conversion table.
Centiohms to Ronnaohms 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.
Ronnaohm is 1e+27 ohm units.
Result = input x 0.01 / 1e+27.
Electrical units in the same family convert directly.
Reserved above the conversion cards and below the converter.
About Converting Centiohms to Ronnaohms
Centiohm and Ronnaohm 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: Centiohm is 0.01 ohm units, and ronnaohm is 1e+27 ohm units.
Formula
ronnaohms = centiohms × 1e-29
This factor comes from each unit's defined relationship to the category's base unit: 1 centiohm equals 0.01 base units, and 1 ronnaohm equals 1e+27 base units, so dividing one by the other gives the direct centiohm-to-ronnaohm factor of 1e-29.
Simple example
1 cOhm × 1e-29 = 1e-29 ROhm
1 centiohm = 1e-29 ronnaohms.
Real-world example
120 cOhm × 1e-29 = 1.2e-27 ROhm
120 centiohms = 1.2e-27 ronnaohms.
Conversion table
| Centiohm (cOhm) | Ronnaohm (ROhm) |
|---|---|
| 1 cOhm | 1e-29 ROhm |
| 5 cOhm | 5e-29 ROhm |
| 12 cOhm | 1.2e-28 ROhm |
| 24 cOhm | 2.4e-28 ROhm |
| 120 cOhm | 1.2e-27 ROhm |
| 240 cOhm | 2.4e-27 ROhm |
Reverse conversion: Ronnaohm to Centiohm
1e-29 ROhm × 1e+29 = 1 cOhm
1e-29 ronnaohms = 1 centiohm.
centiohms = ronnaohms × 1e+29
For a page dedicated to this direction, see Ronnaohm to Centiohm.
Understanding the Centiohm (cOhm)
Centiohm is 0.01 ohm units.
Understanding the Ronnaohm (ROhm)
Ronnaohm is 1e+27 ohm units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many ronnaohms are in 1 centiohm?
1 centiohm equals 1e-29 ronnaohms, using the exact defined conversion factor rather than an estimate.
How do I convert centiohm to ronnaohm?
Multiply the centiohm value by 1e-29. The converter above does this instantly to whatever precision you set.
How do I convert ronnaohm back to centiohm?
Use the reverse factor: 1 ronnaohm equals 1e+29 centiohms. You can also use the swap control in the converter above to flip the direction instantly.
What is a centiohm?
Centiohm (cOhm) is a unit of electricity.
What is a ronnaohm?
Ronnaohm (ROhm) is a unit of electricity.
Is the centiohm to ronnaohm conversion exact?
Yes. Both centiohm and ronnaohm are defined by fixed standards rather than physical artifacts, so the factor of 1e-29 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.