Skip to content

Kilometers to astronomical units

Convert kilometers to astronomical units, with the math shown step by step.

Favorite
Astronomical units
4.3 au

643,270,844.01 km = 4.3 au

Also equals

How it works

au = km ÷ 149,597,870.7

One astronomical unit is exactly 149,597,870.7 kilometers, so dividing by 149,597,870.7 turns kilometers into astronomical units. For example, 225,000,000 km is about 1.504 au.

  1. Divide by 149,597,870.7 643,270,844.01 ÷ 149,597,870.7 = 4.3 au

Nearby values

Kilometers Astronomical units Light-years Parsecs
613,270,844.01 km 4.1 au 0.0000648 0.0000199
623,270,844.01 km 4.17 au 0.0000659 0.0000202
633,270,844.01 km 4.23 au 0.0000669 0.0000205
643,270,844.01 km 4.3 au 0.000068 0.0000208
653,270,844.01 km 4.37 au 0.0000691 0.0000212
663,270,844.01 km 4.43 au 0.0000701 0.0000215
673,270,844.01 km 4.5 au 0.0000712 0.0000218

Printed from rocketcalc.io/astronomy/km-to-au/643270844.01