Convert length and distance units — meters, feet, inches, kilometers, miles, light years and more.
| Unit | Name | Value |
|---|---|---|
| 0.001 au | 1.496e+18 Å | |
| 0.01 au | 1.496e+19 Å | |
| 0.1 au | 1.496e+20 Å | |
| 1 au | 1.496e+21 Å | |
| 5 au | 7.480e+21 Å | |
| 10 au | 1.496e+22 Å | |
| 50 au | 7.480e+22 Å | |
| 100 au | 1.496e+23 Å | |
| 1000 au | 1.496e+24 Å |
Multiply the number of Astronomical Units by 1.496×1021 to get Angstroms. Formula: Å = au × 1.496×1021. Example: 10 au × 1.496×1021 = 1.496×1022 Å. To reverse, divide Angstroms by 1.496×1021 to get Astronomical Units.
| Astronomical Unit (au) | Angstrom (Å) |
|---|---|
| 0.001 au | 1.496×1018 Å |
| 0.01 au | 1.496×1019 Å |
| 0.1 au | 1.496×1020 Å |
| 0.5 au | 7.48×1020 Å |
| 1 au | 1.496×1021 Å |
| 2 au | 2.992×1021 Å |
| 5 au | 7.48×1021 Å |
| 10 au | 1.496×1022 Å |
| 20 au | 2.992×1022 Å |
| 50 au | 7.48×1022 Å |
| 100 au | 1.496×1023 Å |
| 250 au | 3.74×1023 Å |
| 500 au | 7.48×1023 Å |
| 1000 au | 1.496×1024 Å |
| 10000 au | 1.496×1025 Å |
To convert Astronomical Unit to Angstrom, multiply by 1.496×1021. Example: 10 au = 1.496×1022 Å
To convert Angstrom back to Astronomical Unit, divide by 1.496×1021 (multiply by 6.6845×10-22). Use the swap button above.
Start with 100 Astronomical Units = 1.496×1023 Å as your reference point. Scale up or down from there.
Solar physicists measure the Sun's emission lines in angstroms to identify elements in the photosphere, then express distances from the Sun to instruments and spacecraft in astronomical units — a daily cross-scale conversion.
Astrophysicists modelling stellar atmospheres work with atomic absorption cross-sections in angstroms while characterising the stellar environment on AU scales — from planetary orbits to atmospheric layers.
Engineers calibrating space-based telescopes specify detector wavelength sensitivity in angstroms while positioning the telescope at a precise AU distance from the Sun for thermal stability.
Scientists studying solar oscillations and acoustic waves measure pressure fluctuations at angstrom-scale atomic interactions, then model wave propagation across AU-scale distances through the solar interior.
Researchers studying interplanetary dust particles measure grain sizes and crystal lattice spacings in angstroms, then map the dust distribution across the solar system in AU from various planetary orbits.
1 AU = 1.496×10²¹ Å — a number requiring 22 digits. This conversion is a powerful teaching tool for scientific notation and the incomprehensible scale difference between atomic and planetary measurement.
The Astronomical Unit is a unit of Length measurement (symbol: au). 1 au = 1.496×1021 Å. Used in scientific and practical Length measurement applications.
The Angstrom is a unit of Length measurement (symbol: Å). It is part of an internationally recognised measurement system used alongside the Astronomical Unit.
The astronomical unit has ancient roots — Aristarchus of Samos attempted to measure the Earth-Sun distance around 270 BC. For centuries the AU was estimated using Venus transit observations. Edmond Halley organised the first coordinated international transit-of-Venus expedition in 1716. The modern value was determined by radar ranging to Venus in 1961. The IAU formally defined the AU as exactly 149,597,870,700 metres in 2012 — a fixed constant of physics, not a measured quantity.
Anders Jonas Ångström (1814–1874) was a Swedish physicist who pioneered spectroscopy. In 1868 he published the first detailed map of the solar spectrum, expressing wavelengths in units of 10⁻¹⁰ metres. Though not an official SI unit, the angstrom became standard in crystallography and spectroscopy because atomic bond lengths (1–3 Å) and visible light wavelengths (4,000–7,000 Å) fall naturally within it. The International Bureau of Weights and Measures officially accepted it in 1907.
Common use: Astronomical Unit to Angstrom conversion is needed when working with international standards, scientific publications, or reference materials that use different unit systems for Length measurement.