How many micrometers are in 1 AU?

One AU contains approximately 1.496 x 1017 micrometers (about 150 quadrillion). Since 1 AU = 149,597,870,700 m and 1 m = 106 micrometers, multiply.

How do I convert AU to micrometers?

Multiply the AU value by 1.496 x 1017. For example, the Moon at 0.00257 AU is about 3.84 x 1014 micrometers from Earth.

When is this conversion needed?

Almost never. Micrometers measure cells and semiconductor features. AU measures planetary orbits. The 17-order-of-magnitude gap means these units never meet in practice.

Astronomical Units to Micrometers (au to μm) Converter

1 au = 1.49598 × 10¹⁷ μm

1 Astronomical Unit equals 1.49598 × 10¹⁷ Micrometers (1 au = 1.49598 × 10¹⁷ μm). Convert Astronomical Units to Micrometers with formula, table, and examples.

One astronomical unit equals approximately 1.496 x 10¹⁷ micrometers, or about 150 quadrillion micrometers. This conversion spans from planetary orbit scale to the cellular biology scale. A red blood cell at 7 micrometers is unfathomably small compared to the 149.6-million-km Earth-Sun distance.

How to Convert Astronomical Units to Micrometers

μm = au × 1.49598 × 10¹⁷

Multiply the value in Astronomical Units by 1.49598 × 10¹⁷

Take your value in Astronomical Units
Multiply by 1.49598 × 10¹⁷
Read the result in Micrometers

Common Astronomical Units to Micrometers Conversions

Astronomical Units (au)	Micrometers (μm)	Status
1 × 10⁻¹⁵ au	149.5979 μm
1 × 10⁻¹⁴ au	1,495.9787 μm
1 × 10⁻¹³ au	14,959.7871 μm
1 × 10⁻¹² au	149,597.8707 μm
1 × 10⁻¹¹ au	1,495,978.707 μm
1 × 10⁻¹⁰ au	14,959,787.07 μm
1 × 10⁻⁹ au	149,597,870.7 μm
1 × 10⁻⁸ au	1,495,978,707 μm
1 × 10⁻⁷ au	14,959,787,070 μm
0.000001 au	149,597,870,700 μm
0.00001 au	1,495,980,000,000 μm

Good to Know About Astronomical Units to Micrometers Conversion

Micrometers are the language of biologists studying cells; AU is the language of astronomers studying planets. The conversion between them exists only to demonstrate the hierarchy of measurement scales.

Astronomical Units to Micrometers: What You Need to Know

The Earth-Sun distance contains about 150 quadrillion micrometers. A human hair (75 micrometers) is 5 x 10^-16 AU across. A bacterium at 1 micrometer is 6.7 x 10^-18 AU. These numbers show why micrometers and AU belong to entirely different scientific domains.

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 Micrometer? μm

One millionth of a meter, also called a micron. Used in biology for cell sizes, in engineering for surface finishes, and in manufacturing tolerances.

Metric biology manufacturing engineering tolerances

Learn more about Micrometer →

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

Astronomical Units to Micrometers FAQ

One AU contains approximately 1.496 x 10¹⁷ micrometers (about 150 quadrillion). Since 1 AU = 149,597,870,700 m and 1 m = 10⁶ micrometers, multiply.
Multiply the AU value by 1.496 x 10¹⁷. For example, the Moon at 0.00257 AU is about 3.84 x 10¹⁴ micrometers from Earth.
Almost never. Micrometers measure cells and semiconductor features. AU measures planetary orbits. The 17-order-of-magnitude gap means these units never meet in practice.

Non-Frequently Asked Questions About Astronomical Units to Micrometers

Questions nobody should ask - but someone did.

A typical human cell is about 20 um. 1 AU is about 1.496 x 10¹⁷ um. That is about 7.48 quadrillion cells in a line. Your body has 37 trillion cells - enough to span only 0.5% of the way to the Sun. You are cosmically tiny.