Nanoampere is 1e-9 ampere units.
Nanoamperes to Rontoamperes Converter — nA to rA
Convert Nanoampere (nA) to Rontoampere (rA) using the exact conversion factor (1 nanoampere = 1e+18 rontoampere). See the formula, worked examples, and conversion table.
Nanoamperes to Rontoamperes 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.
Rontoampere is 1e-27 ampere units.
Result = input x 1e-9 / 1e-27.
Electrical units in the same family convert directly.
Reserved above the conversion cards and below the converter.
About Converting Nanoamperes to Rontoamperes
Nanoampere and Rontoampere 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: Nanoampere is 1e-9 ampere units, and rontoampere is 1e-27 ampere units.
Formula
rontoamperes = nanoamperes × 1e+18
This factor comes from each unit's defined relationship to the category's base unit: 1 nanoampere equals 1e-9 base units, and 1 rontoampere equals 1e-27 base units, so dividing one by the other gives the direct nanoampere-to-rontoampere factor of 1e+18.
Simple example
1 nA × 1e+18 = 1e+18 rA
1 nanoampere = 1e+18 rontoamperes.
Real-world example
120 nA × 1e+18 = 1.2e+20 rA
120 nanoamperes = 1.2e+20 rontoamperes.
Conversion table
| Nanoampere (nA) | Rontoampere (rA) |
|---|---|
| 1 nA | 1e+18 rA |
| 5 nA | 5e+18 rA |
| 12 nA | 1.2e+19 rA |
| 24 nA | 2.4e+19 rA |
| 120 nA | 1.2e+20 rA |
| 240 nA | 2.4e+20 rA |
Reverse conversion: Rontoampere to Nanoampere
1e+18 rA × 1e-18 = 1 nA
1e+18 rontoamperes = 1 nanoampere.
nanoamperes = rontoamperes × 1e-18
For a page dedicated to this direction, see Rontoampere to Nanoampere.
Understanding the Nanoampere (nA)
Nanoampere is 1e-9 ampere units.
Understanding the Rontoampere (rA)
Rontoampere is 1e-27 ampere units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many rontoamperes are in 1 nanoampere?
1 nanoampere equals 1e+18 rontoamperes, using the exact defined conversion factor rather than an estimate.
How do I convert nanoampere to rontoampere?
Multiply the nanoampere value by 1e+18. The converter above does this instantly to whatever precision you set.
How do I convert rontoampere back to nanoampere?
Use the reverse factor: 1 rontoampere equals 1e-18 nanoamperes. You can also use the swap control in the converter above to flip the direction instantly.
What is a nanoampere?
Nanoampere (nA) is a unit of electricity.
What is a rontoampere?
Rontoampere (rA) is a unit of electricity.
Is the nanoampere to rontoampere conversion exact?
Yes. Both nanoampere and rontoampere are defined by fixed standards rather than physical artifacts, so the factor of 1e+18 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.