Attosiemens is 1e-18 siemens units.
Attosiemens to Rontosiemens Converter — aS to rS
Convert Attosiemens (aS) to Rontosiemens (rS) using the exact conversion factor (1 attosiemens = 1,000,000,000 rontosiemens). See the formula, worked examples, and conversion table.
Attosiemens to Rontosiemens 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.
Rontosiemens is 1e-27 siemens units.
Result = input x 1e-18 / 1e-27.
Electrical units in the same family convert directly.
Reserved above the conversion cards and below the converter.
About Converting Attosiemens to Rontosiemens
Attosiemens and Rontosiemens 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: Attosiemens is 1e-18 siemens units, and rontosiemens is 1e-27 siemens units.
Formula
rontosiemens = attosiemens × 1000000000
This factor comes from each unit's defined relationship to the category's base unit: 1 attosiemens equals 1e-18 base units, and 1 rontosiemens equals 1e-27 base units, so dividing one by the other gives the direct attosiemens-to-rontosiemens factor of 1000000000.
Simple example
1 aS × 1000000000 = 1,000,000,000 rS
1 attosiemens = 1,000,000,000 rontosiemens.
Real-world example
120 aS × 1000000000 = 120,000,000,000 rS
120 attosiemens = 120,000,000,000 rontosiemens.
Conversion table
| Attosiemens (aS) | Rontosiemens (rS) |
|---|---|
| 1 aS | 1,000,000,000 rS |
| 5 aS | 5,000,000,000 rS |
| 12 aS | 12,000,000,000 rS |
| 24 aS | 24,000,000,000 rS |
| 120 aS | 120,000,000,000 rS |
| 240 aS | 240,000,000,000 rS |
Reverse conversion: Rontosiemens to Attosiemens
1 rS × 1e-9 = 1e-9 aS
1 rontosiemens = 1e-9 attosiemens.
attosiemens = rontosiemens × 1e-9
For a page dedicated to this direction, see Rontosiemens to Attosiemens.
Understanding the Attosiemens (aS)
Attosiemens is 1e-18 siemens units.
Understanding the Rontosiemens (rS)
Rontosiemens is 1e-27 siemens units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many rontosiemens are in 1 attosiemens?
1 attosiemens equals 1,000,000,000 rontosiemens, using the exact defined conversion factor rather than an estimate.
How do I convert attosiemens to rontosiemens?
Multiply the attosiemens value by 1000000000. The converter above does this instantly to whatever precision you set.
How do I convert rontosiemens back to attosiemens?
Use the reverse factor: 1 rontosiemens equals 1e-9 attosiemens. You can also use the swap control in the converter above to flip the direction instantly.
What is a attosiemens?
Attosiemens (aS) is a unit of electricity.
What is a rontosiemens?
Rontosiemens (rS) is a unit of electricity.
Is the attosiemens to rontosiemens conversion exact?
Yes. Both attosiemens and rontosiemens are defined by fixed standards rather than physical artifacts, so the factor of 1000000000 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.