The ohm (Ω) is the SI unit of electrical resistance, describing how strongly a material opposes current flow.
Ohms to Attoohms
Convert Ohm (Ω) to Attoohm (aΩ) instantly with an exact formula, conversion table, and FAQ.
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Convert ohms (Ω) to attoohms (aΩ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
An Attoohm (aΩ) equals 1e-18 ohm(s), a scaled unit of electrical resistance used for atto-scale electrical work.
aΩ = Ω × 1.000000e+18
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Formula
aΩ = Ω × 1.000000e+18
Ω = aΩ × 1.000000e-18
Conversion table
| 1 Ω | 1.000000e+18 aΩ |
| 5 Ω | 5.000000e+18 aΩ |
| 10 Ω | 1.000000e+19 aΩ |
| 20 Ω | 2.000000e+19 aΩ |
| 50 Ω | 5.000000e+19 aΩ |
| 100 Ω | 1.000000e+20 aΩ |
| 500 Ω | 5.000000e+20 aΩ |
| 1000 Ω | 1.000000e+21 aΩ |
Related conversions
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How the formula works
Both ohm and attoohm measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in ohms by 1.000000e+18 to get attoohms. To reverse the conversion, multiply a attoohm value by 1.000000e-18 to get back to ohms.
Frequently asked questions
What is Ohm (Ω)?
The ohm (Ω) is the SI unit of electrical resistance, describing how strongly a material opposes current flow.
What is Attoohm (aΩ)?
An Attoohm (aΩ) equals 1e-18 ohm(s), a scaled unit of electrical resistance used for atto-scale electrical work.
How do I convert ohms to attoohms?
Multiply the ohm value by 1.000000e+18 to get the equivalent in attoohms. For example, 5 Ω × 1.000000e+18 = 5.000000e+18 aΩ.
Is this conversion exact?
Yes. Both units use fixed, defined scale factors, so the factor 1.000000e+18 is an exact, non-rounded value.
Can I convert attoohms back to ohms?
Yes. Divide the attoohm value by 1.000000e+18, or multiply it by 1.000000e-18, to get ohms.
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About converting ohms to attoohms
The ohm (Ω) is the SI unit of electrical resistance, describing how strongly a material opposes current flow. An Attoohm (aΩ) equals 1e-18 ohm(s), a scaled unit of electrical resistance used for atto-scale electrical work.
Use this calculator to move between ohms and attoohms accurately for homework, engineering, billing, or everyday electricity calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.