Astronomical Units to Kilometers (AU to km)
Free online astronomical unit to kilometer converter. Type a value, get an instant exact result — plus the formula, a ready-made conversion table, and reverse conversion.
LENGTH CONVERTER — INSTANT RESULT
Formula: multiply the astronomical unit value by 149,597,870.69999999 — i.e. km = AU × 149,597,870.69999999
Quick check: 1 AU = 149,597,870.69999999 km
Quick check: 1 AU = 149,597,870.69999999 km
Astronomical Units to Kilometers conversion table
| Astronomical Units (AU) | Kilometers (km) |
|---|---|
| 1 AU | 149,597,870.69999999 km |
| 2 AU | 299,195,741.39999998 km |
| 3 AU | 448,793,612.10000002 km |
| 4 AU | 598,391,482.79999995 km |
| 5 AU | 747,989,353.5 km |
| 6 AU | 897,587,224.20000005 km |
| 7 AU | 1,047,185,094.89999998 km |
| 8 AU | 1,196,782,965.5999999 km |
| 9 AU | 1,346,380,836.29999995 km |
| 10 AU | 1,495,978,707 km |
| 15 AU | 2,243,968,060.5 km |
| 20 AU | 2,991,957,414 km |
| 25 AU | 3,739,946,767.5 km |
| 30 AU | 4,487,936,121 km |
| 40 AU | 5,983,914,828 km |
| 50 AU | 7,479,893,535 km |
| 75 AU | 11,219,840,302.5 km |
| 100 AU | 14,959,787,070 km |
| 250 AU | 37,399,467,675 km |
| 500 AU | 74,798,935,350 km |
| 1,000 AU | 149,597,870,700 km |
How to convert astronomical units to kilometers
To convert astronomical units to kilometers, multiply the amount in astronomical units by 149,597,870.69999999. For example, 10 AU = 1,495,978,707 km. To convert in the other direction, divide by the same factor, or use the ⇄ swap button above.
Convert between metric and imperial/US customary length units, plus nautical, astronomical and survey units. The meter is the SI base unit of length; all factors below are exact definitions where a legal definition exists.
Frequently asked questions
How many kilometers are in one astronomical unit?
One astronomical unit is exactly 149,597,870.69999999 kilometers.
How do I convert AU to km?
Multiply the AU value by 149,597,870.69999999 to get km. The converter at the top of this page does this automatically and works in both directions.
How much is 100 astronomical units in kilometers?
100 astronomical units equals 14,959,787,070 kilometers.