Rontoampere is 1e-27 ampere units.
Rontoamperes to Yoctoamperes Converter — rA to yA
Convert Rontoampere (rA) to Yoctoampere (yA) using the exact conversion factor (1 rontoampere = 0.001 yoctoampere). See the formula, worked examples, and conversion table.
Rontoamperes to Yoctoamperes 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.
Yoctoampere is 1e-24 ampere 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 Rontoamperes to Yoctoamperes
Rontoampere and Yoctoampere 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: Rontoampere is 1e-27 ampere units, and yoctoampere is 1e-24 ampere units.
Formula
yoctoamperes = rontoamperes × 0.001
This factor comes from each unit's defined relationship to the category's base unit: 1 rontoampere equals 1e-27 base units, and 1 yoctoampere equals 1e-24 base units, so dividing one by the other gives the direct rontoampere-to-yoctoampere factor of 0.001.
Simple example
1 rA × 0.001 = 0.001 yA
1 rontoampere = 0.001 yoctoamperes.
Real-world example
120 rA × 0.001 = 0.12 yA
120 rontoamperes = 0.12 yoctoamperes.
Conversion table
| Rontoampere (rA) | Yoctoampere (yA) |
|---|---|
| 1 rA | 0.001 yA |
| 5 rA | 0.005 yA |
| 12 rA | 0.012 yA |
| 24 rA | 0.024 yA |
| 120 rA | 0.12 yA |
| 240 rA | 0.24 yA |
Reverse conversion: Yoctoampere to Rontoampere
0.001 yA × 1000 = 1 rA
0.001 yoctoamperes = 1 rontoamperes.
rontoamperes = yoctoamperes × 1000
For a page dedicated to this direction, see Yoctoampere to Rontoampere.
Understanding the Rontoampere (rA)
Rontoampere is 1e-27 ampere units.
Understanding the Yoctoampere (yA)
Yoctoampere is 1e-24 ampere units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many yoctoamperes are in 1 rontoampere?
1 rontoampere equals 0.001 yoctoamperes, using the exact defined conversion factor rather than an estimate.
How do I convert rontoampere to yoctoampere?
Multiply the rontoampere value by 0.001. The converter above does this instantly to whatever precision you set.
How do I convert yoctoampere back to rontoampere?
Use the reverse factor: 1 yoctoampere equals 1,000 rontoamperes. You can also use the swap control in the converter above to flip the direction instantly.
What is a rontoampere?
Rontoampere (rA) is a unit of electricity.
What is a yoctoampere?
Yoctoampere (yA) is a unit of electricity.
Is the rontoampere to yoctoampere conversion exact?
Yes. Both rontoampere and yoctoampere 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.