To convert angstroms to astronomical units, multiply by 6.684587122e-22.
The calculation uses 1 Å = 6.684587122e-22 AU. Results are displayed to at most 10 significant digits. Definitions can be exact while a displayed decimal is rounded. Match the displayed precision to your original measurement.
The formula
value in AU = value in Å × 6.684587122e-22
Å- Input unit: angstroms
AU- Output unit: astronomical units
How to use this calculator
- Enter a value in Å.
- Multiply by the stored conversion factor.
- Read the result in AU; divide by the same factor to convert back.
Worked examples
Worked conversion
1 Å × 6.684587122e-22 ≈ 6.684587122e-22 AU.
Reverse conversion
6.684587122e-22 AU ÷ 6.684587122e-22 ≈ 1 Å. Rounding intermediate values can change the last displayed digit.
Frequently asked questions
What factor does this converter use?
It uses 6.684587122e-22 AU per Å.
Why can another converter show a slightly different answer?
Check the unit convention first (such as US versus Imperial or decimal versus binary), then compare rounding. Measurement uncertainty is separate from the unit conversion.
Å to AU table
| Å | AU (rounded) |
|---|---|
| 0 | 0 |
| 1 | 6.684587122e-22 |
| 2 | 1.336917424e-21 |
| 5 | 3.342293561e-21 |
| 10 | 6.684587122e-21 |
| 100 | 6.684587122e-20 |
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