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Astronomical units to kilometers

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

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Kilometers
673,190,418.15 km

4.5 au = 673,190,418.15 km

Also equals

How it works

km = au × 149,597,870.7

One astronomical unit is exactly 149,597,870.7 kilometers, so multiplying by 149,597,870.7 turns astronomical units into kilometers. For example, 1 au is about 149,600,000 km.

  1. Multiply by 149,597,870.7 4.5 × 149,597,870.7 = 673,190,418.15 km

Nearby values

Astronomical units Kilometers Miles Light-years
4.2 au 628,311,056.94 km 390,414,390.55 0.0000664
4.3 au 643,270,844.01 km 399,709,971.27 0.000068
4.4 au 658,230,631.08 km 409,005,552 0.0000696
4.5 au 673,190,418.15 km 418,301,132.73 0.0000712
4.6 au 688,150,205.22 km 427,596,713.46 0.0000727
4.7 au 703,109,992.29 km 436,892,294.18 0.0000743
4.8 au 718,069,779.36 km 446,187,874.91 0.0000759

Printed from rocketcalc.io/astronomy/au-to-km/4.5