How many ångströms are in 1 AU?

One AU contains approximately 1.496 × 1021 ångströms (about 1.5 sextillion). This enormous number reflects the 21-order-of-magnitude gap between solar system and atomic scales.

How do I convert AU to ångströms?

Multiply the AU value by 1.496 × 1021. For example, 5 AU (roughly Jupiter's distance) = 7.48 × 1021 Å.

Why would I convert AU to ångströms?

Only for educational purposes to demonstrate scale. No scientific measurement requires expressing planetary distances in atomic units. Astronomers use AU, light-years, or parsecs for solar system and stellar distances.

Astronomical Units to Angstroms (au to A) Converter

1 au = 1.49598 × 10²¹ A

1 Astronomical Unit equals 1.49598 × 10²¹ Angstroms (1 au = 1.49598 × 10²¹ A). Convert Astronomical Units to Angstroms with formula, table, and examples.

One astronomical unit equals approximately 1.496 × 10²¹ ångströms - about 1.5 sextillion. This is the reverse of the ångströms-to-AU conversion and spans the full range from planetary orbit scale down to atomic bond scale. The number is so enormous it illustrates why different units exist for different scales.

How to Convert Astronomical Units to Angstroms

A = au × 1.49598 × 10²¹

Multiply the value in Astronomical Units by 1.49598 × 10²¹

Take your value in Astronomical Units
Multiply by 1.49598 × 10²¹
Read the result in Angstroms

Common Astronomical Units to Angstroms Conversions

Astronomical Units (au)	Angstroms (A)	Status
1 × 10⁻¹⁵ au	1,495,978.707 A
1 × 10⁻¹⁴ au	14,959,787.07 A
1 × 10⁻¹³ au	149,597,870.7 A
1 × 10⁻¹² au	1,495,978,707 A
1 × 10⁻¹¹ au	14,959,787,070 A
1 × 10⁻¹⁰ au	149,597,870,700 A
1 × 10⁻⁹ au	1,495,980,000,000 A
1 × 10⁻⁸ au	14,959,800,000,000 A
1 × 10⁻⁷ au	149,598,000,000,000 A
0.000001 au	1.49598 × 10¹⁵ A
0.00001 au	1.49598 × 10¹⁶ A

Good to Know About Astronomical Units to Angstroms Conversion

This conversion takes us from the realm of NASA missions and planetary science down to the realm of chemistry labs and X-ray crystallography. The two communities measure in completely different units for good reason.

Astronomical Units to Angstroms: What You Need to Know

The Earth-Sun distance (1 AU) expressed in ångströms is about 1,496,000,000,000,000,000,000 - a number with 21 digits. Mars at 1.52 AU is roughly 2.27 × 10²¹ Å from the Sun. These conversions appear only in educational contexts demonstrating the hierarchy of measurement scales.

What is a Astronomical Unit? au

Exactly 149,597,870,700 meters by IAU 2012 definition. Roughly the average distance from the Earth to the Sun. Used for distances within our solar system.

Astronomical solar system distances astronomy planetary science

Learn more about Astronomical Unit →

What is a Angstrom? A

One ten-billionth of a meter (0.1 nanometers). Named after Anders Jonas Angstrom. Used in crystallography, spectroscopy, and atomic physics.

Metric crystallography spectroscopy atomic physics

Learn more about Angstrom →

Going the other way? Use our Angstroms to Astronomical Units converter.

Astronomical Units to Angstroms FAQ

One AU contains approximately 1.496 × 10²¹ ångströms (about 1.5 sextillion). This enormous number reflects the 21-order-of-magnitude gap between solar system and atomic scales.
Multiply the AU value by 1.496 × 10²¹. For example, 5 AU (roughly Jupiter's distance) = 7.48 × 10²¹ Å.
Only for educational purposes to demonstrate scale. No scientific measurement requires expressing planetary distances in atomic units. Astronomers use AU, light-years, or parsecs for solar system and stellar distances.

Non-Frequently Asked Questions About Astronomical Units to Angstroms

Questions nobody should ask - but someone did.

If 1 AU (Earth-Sun distance) shrank to 1 meter (desk-width), an atom at 1 angstrom would shrink to about 10^-16 meters, or 100 attometers. That is smaller than a proton. You could not detect it even with the most powerful particle accelerator.
One AU contains about 1.496 x 10²¹ angstroms (1.5 sextillion). The Milky Way has about 100-400 billion stars. Angstroms in an AU outnumber galaxy stars by a factor of about 5 billion. The small stuff adds up.
You would need about 10²¹ atoms end-to-end to span 1 AU. A human body contains about 7 x 10²⁷ atoms, enough to stretch from Earth to the Sun about 7 million times. You contain multitudes - and then some.