How many AU is 1 meter?

One meter equals approximately 6.685 x 10-12 AU (about 6.7 trillionths of an AU).

How many meters are in 1 AU?

One AU equals exactly 149,597,870,700 meters (about 149.6 billion m), as defined by the IAU in 2012.

When is meters-to-AU conversion used?

In spacecraft navigation. Trajectory calculations are done in meters (or km), but mission distances are reported in AU for context. Mars at closest approach is about 0.37 AU or 55.7 billion meters.

Meters to Astronomical Units (m to au) Converter

1 m = 6.68459 × 10⁻¹² au

1 Meter equals 6.68459 × 10⁻¹² Astronomical Units (1 m = 6.68459 × 10⁻¹² au). Convert Meters to Astronomical Units with formula, table, and examples.

One meter equals approximately 6.685 x 10^-12 astronomical units. The AU (149.6 billion meters) measures planetary distances; the meter measures human-scale objects. About 11 orders of magnitude separate them.

How to Convert Meters to Astronomical Units

au = m ÷ 149,597,870,700

Divide the value in Meters by 149,597,870,700

Take your value in Meters
Divide by 149,597,870,700
Read the result in Astronomical Units

Common Meters to Astronomical Units Conversions

Meters (m)	Astronomical Units (au)	Status
1 m	6.68459 × 10⁻¹² au
10 m	6.68459 × 10⁻¹¹ au
100 m	6.68459 × 10⁻¹⁰ au
1,000 m	6.68459 × 10⁻⁹ au
10,000 m	6.68459 × 10⁻⁸ au
100,000 m	6.68459 × 10⁻⁷ au
1,000,000 m	0.000007 au
10,000,000 m	0.0001 au
100,000,000 m	0.0007 au
1,000,000,000 m	0.0067 au

Good to Know About Meters to Astronomical Units Conversion

The meter was derived from Earth's circumference. The AU was derived from Earth's orbit. Both units are defined by our planet's relationship with the cosmos. The meter measures the ground beneath us; the AU measures the sky above us.

Meters to Astronomical Units: What You Need to Know

The Earth-Sun distance is 1 AU = 149,597,870,700 m (about 149.6 billion meters). Light crosses 1 AU in about 499 seconds (8 minutes 19 seconds). The meter-to-AU conversion is essential in spacecraft navigation where trajectory calculations use meters but results are reported in AU.

What is a Meter? m

The base unit of length in the International System of Units (SI). Used worldwide as the standard measure of distance.

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Learn more about Meter →

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.

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Learn more about Astronomical Unit →

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

Meters to Astronomical Units FAQ

One meter equals approximately 6.685 x 10^-12 AU (about 6.7 trillionths of an AU).
One AU equals exactly 149,597,870,700 meters (about 149.6 billion m), as defined by the IAU in 2012.
In spacecraft navigation. Trajectory calculations are done in meters (or km), but mission distances are reported in AU for context. Mars at closest approach is about 0.37 AU or 55.7 billion meters.

Non-Frequently Asked Questions About Meters to Astronomical Units

Questions nobody should ask - but someone did.

About 149.6 billion meter sticks. At $5 each, that is $748 billion - roughly the GDP of Switzerland. The Swiss could fund a meter-stick highway to the Sun. They probably will not.
149.6 billion seconds = about 4,741 years. You would arrive around the year 6767. Bring sunscreen for a civilization that does not yet exist.
Since 2012, the IAU defines 1 AU = 149,597,870,700 m exactly. Before that, it was defined by the gravitational constant and varied slightly with measurement improvements. Astronomers got tired of the number changing and just fixed it. Sometimes science is about picking a number and sticking with it.