The ampere (A) is the SI unit of electric current, measuring the rate of flow of electric charge.
Amperes to Attoamperes
Convert Ampere (A) to Attoampere (aA) instantly with an exact formula, conversion table, and FAQ.
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Convert amperes (A) to attoamperes (aA) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
An Attoampere (aA) equals 1e-18 ampere(s), a scaled unit of electric current used for atto-scale electrical work.
aA = A × 1.000000e+18
Results update instantly for Amperes to Attoamperes conversions.
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Formula
aA = A × 1.000000e+18
A = aA × 1.000000e-18
Conversion table
| 1 A | 1.000000e+18 aA |
| 5 A | 5.000000e+18 aA |
| 10 A | 1.000000e+19 aA |
| 20 A | 2.000000e+19 aA |
| 50 A | 5.000000e+19 aA |
| 100 A | 1.000000e+20 aA |
| 500 A | 5.000000e+20 aA |
| 1000 A | 1.000000e+21 aA |
Related conversions
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How the formula works
Both ampere and attoampere measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in amperes by 1.000000e+18 to get attoamperes. To reverse the conversion, multiply a attoampere value by 1.000000e-18 to get back to amperes.
Frequently asked questions
What is Ampere (A)?
The ampere (A) is the SI unit of electric current, measuring the rate of flow of electric charge.
What is Attoampere (aA)?
An Attoampere (aA) equals 1e-18 ampere(s), a scaled unit of electric current used for atto-scale electrical work.
How do I convert amperes to attoamperes?
Multiply the ampere value by 1.000000e+18 to get the equivalent in attoamperes. For example, 5 A × 1.000000e+18 = 5.000000e+18 aA.
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 attoamperes back to amperes?
Yes. Divide the attoampere value by 1.000000e+18, or multiply it by 1.000000e-18, to get amperes.
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About converting amperes to attoamperes
The ampere (A) is the SI unit of electric current, measuring the rate of flow of electric charge. An Attoampere (aA) equals 1e-18 ampere(s), a scaled unit of electric current used for atto-scale electrical work.
Use this calculator to move between amperes and attoamperes accurately for homework, engineering, billing, or everyday electricity calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.