convertimate Length

Astronomical units to kilometers

Type a value in AU to get it in km instantly.

1.496×10¹⁰km

That's 38,917× as long as the distance to the Moon — nothing on our list beats it. Walking, you would cover that in 338,600 years.

What it means

How long is that?

Reference lengths are typical values. The inch, foot, yard and mile are defined exactly in meters (1 inch = 2.54 cm).

The math

How to convert AU to km

To convert astronomical units to kilometers, multiply by 149,598,000.

Example: 100 AU × 149,598,000 = 1.496×10¹⁰ km.

In the other direction, 1 km = 6.685×10⁻⁹ AU.

Every unit

Your length in every unit

Tables

AU to km conversion table

AU to km conversion table
AUkm
1 AU149,598,000 km
2 AU299,196,000 km
3 AU448,794,000 km
5 AU747,989,000 km
10 AU1.496×10⁹ km
15 AU2.244×10⁹ km
20 AU2.992×10⁹ km
25 AU3.74×10⁹ km
30 AU4.488×10⁹ km
50 AU7.48×10⁹ km
75 AU1.122×10¹⁰ km
100 AU1.496×10¹⁰ km
150 AU2.244×10¹⁰ km
200 AU2.992×10¹⁰ km
500 AU7.48×10¹⁰ km
1,000 AU1.496×10¹¹ km
km to AU conversion table
km to AU conversion table
kmAU
1 km6.685×10⁻⁹ AU
2 km1.337×10⁻⁸ AU
3 km2.005×10⁻⁸ AU
5 km3.342×10⁻⁸ AU
10 km6.685×10⁻⁸ AU
15 km1.003×10⁻⁷ AU
20 km1.337×10⁻⁷ AU
25 km1.671×10⁻⁷ AU
30 km2.005×10⁻⁷ AU
50 km3.342×10⁻⁷ AU
75 km5.013×10⁻⁷ AU
100 km6.685×10⁻⁷ AU
150 km1.003×10⁻⁶ AU
200 km1.337×10⁻⁶ AU
500 km3.342×10⁻⁶ AU
1,000 km6.685×10⁻⁶ AU

Quick answers

Quick answers

How many km is 1 AU?
1 AU is 149,598,000 km.
How many km is 10 AU?
10 AU is 1.496×10⁹ km.
How many km is 100 AU?
100 AU is 1.496×10¹⁰ km.

The units

About these units

Astronomical units (AU)

One astronomical unit is the average Earth–Sun distance, fixed at 149,597,870,700 m. It is the natural ruler for the solar system.

Kilometers (km)

A kilometer is 1,000 meters, about a 12-minute walk. Road distances and running races use it almost everywhere outside the US and UK.

Learn more about length units

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