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Light-Years to Kilometers Converter

ly → km: type a value and the result appears instantly.

1 ly = 9,460,730,473,000 km
1 km = 1.057000834 × 10^-13 ly
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How to convert light-years to kilometers

Use this formula:

km = ly × 9,460,730,473,000

Examples

ly to km conversion chart

light-years (ly)kilometers (km)
0.1 ly946,073,000,000 km
0.25 ly2,365,180,000,000 km
0.5 ly4,730,370,000,000 km
1 ly9,460,730,000,000 km
2 ly18,921,500,000,000 km
3 ly28,382,200,000,000 km
4 ly37,842,900,000,000 km
5 ly47,303,700,000,000 km
6 ly56,764,400,000,000 km
7 ly66,225,100,000,000 km
8 ly75,685,800,000,000 km
9 ly85,146,600,000,000 km
10 ly94,607,300,000,000 km
12 ly113,529,000,000,000 km
15 ly141,911,000,000,000 km
20 ly189,215,000,000,000 km
25 ly236,518,000,000,000 km
30 ly283,822,000,000,000 km
40 ly378,429,000,000,000 km
50 ly473,037,000,000,000 km
60 ly567,644,000,000,000 km
70 ly662,251,000,000,000 km
75 ly709,555,000,000,000 km
80 ly756,858,000,000,000 km
90 ly851,466,000,000,000 km
100 ly946,073,000,000,000 km
150 ly1.41911 × 10^15 km
200 ly1.89215 × 10^15 km
250 ly2.36518 × 10^15 km
500 ly4.73037 × 10^15 km
1,000 ly9.46073 × 10^15 km

About the units

Light-year (ly) is a commonly used unit. 1 ly = 9,460,730,473,000 km.

Kilometer (km) is a metric (SI) unit. 1 km = 1,000 m.

Frequently asked questions

How do I convert light-years to kilometers?
Multiply the value in ly by 9,460,730,473,000.
How many kilometers are in 1 light-year?
1 ly = 9,460,730,473,000 km.
What is 12 ly in km?
12 ly = 113,529,000,000,000 km.
How do I convert kilometers to light-years?
Use the reverse converter: km → ly.

Length Converter →

Sources: NIST SP 811 · BIPM SI Brochure · NIST Handbook 44. Last reviewed: 2026-10 · FreeUnitConverters