Prefixes / E → a
Convert Exa units to Atto units
Convert decimal SI prefixes from quecto to quetta. Convert Exa units (E) to Atto units (a). Find the formula, worked examples, unit definitions, and practical guidance below.
Reverse: Atto units to Exa units →
How to convert exa units to atto units
Prefixes scale the same underlying unit. These are decimal factors, not binary storage prefixes. For squared or cubed units, apply the prefix power to the entire prefixed unit separately.
Use x for the value in E, b for the intermediate value in (unit), and y for the result in a.
a = E × 1000000000000000000 ÷ 1e-18
Worked examples
10 E ≈ 1e+37 a
Step 1: (10 × 1000000000000000000) ≈ 10000000000000000000 (unit).
Step 2: 10000000000000000000 ÷ 1e-18 ≈ 1e+37 a.20 E ≈ 2e+37 a
Step 1: (20 × 1000000000000000000) ≈ 20000000000000000000 (unit).
Step 2: 20000000000000000000 ÷ 1e-18 ≈ 2e+37 a.
Results are rounded to 12 significant digits. Converting units does not increase the precision of the original measurement. Very large or small values outside JavaScript’s finite numeric range are rejected.
About Exa units
Exa units (E) measures prefixes under the conventions above. The base value in (unit) is (x × 1000000000000000000), where x is the numerical value in E. Factors shown here are rounded for display; calculations use the stored factor.
About Atto units
Atto units (a) measures prefixes under the conventions above. The base value in (unit) is (x × 1e-18), where x is the numerical value in a. Factors shown here are rounded for display; calculations use the stored factor.
Definitions and sources
For a different quantity or formatting task, see the related other conversion tools.
Exa units to atto units reference table
| Exa units (E) | Atto units (a) |
|---|---|
| 1 | 1e+36 |
| 5 | 5e+36 |
| 10 | 1e+37 |
| 25 | 2.5e+37 |
| 50 | 5e+37 |
| 100 | 1e+38 |
| 1000 | 1e+39 |
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