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Kilometers to Light-years Converter (km to ly)

1 km = 1.057000834 × 10⁻¹³ ly. Type any value to convert kilometers to light-years.

1 km = 1.057000834 × 10⁻¹³ ly

Formula: ly = km × 1.057000834 × 10⁻¹³

Common values
Decimals
In every unit 22 units
Nanometer (nm) 1,000,000,000,000 nm
Micrometer (µm) 1,000,000,000 µm
Millimeter (mm) 1,000,000 mm
Centimeter (cm) 100,000 cm
Decimeter (dm) 10,000 dm
Meter (m) 1,000 m
Kilometer (km) 1 km
Inch (in) 39,370.07874 in
Foot (ft) 3,280.839895 ft
Yard (yd) 1,093.613298 yd
Mile (mi) 0.6213711922 mi
Nautical mile (nmi) 0.5399568035 nmi
Mil (thou) (mil) 39,370,078.74 mil
Hand (hh) 9,842.519685 hh
Fathom (ftm) 546.8066492 ftm
Chain (ch) 49.70969538 ch
Furlong (fur) 4.970969538 fur
League (lea) 0.2071237307 lea
Ångström (Å) 10,000,000,000,000 Å
Astronomical unit (au) 6.684587122 × 10⁻⁹ au
Light-year (ly) 1.057000834 × 10⁻¹³ ly
Parsec (pc) 3.240779289 × 10⁻¹⁴ pc

Convert on our server?

If you continue, the file is uploaded over an encrypted connection and converted on our server. You can keep using the site meanwhile. The original is deleted as soon as it is converted; the result is kept for 6 hours so you can download it, and you can delete it at any time. Files are never shared or used for anything else.

Calculated in your browser – nothing you type is sent anywhere. Privacy details

Kilometers to light-years table

Formula: ly = km × 1.057000834 × 10⁻¹³

Kilometer (km)Light-year (ly)
0.1 km1.057000834 × 10⁻¹⁴ ly
0.25 km2.642502085 × 10⁻¹⁴ ly
0.5 km5.28500417 × 10⁻¹⁴ ly
1 km1.057000834 × 10⁻¹³ ly
2 km2.114001668 × 10⁻¹³ ly
3 km3.171002502 × 10⁻¹³ ly
4 km4.228003336 × 10⁻¹³ ly
5 km5.28500417 × 10⁻¹³ ly
6 km6.342005004 × 10⁻¹³ ly
7 km7.399005838 × 10⁻¹³ ly
8 km8.456006672 × 10⁻¹³ ly
9 km9.513007506 × 10⁻¹³ ly
10 km1.057000834 × 10⁻¹² ly
12 km1.268401001 × 10⁻¹² ly
15 km1.585501251 × 10⁻¹² ly
20 km2.114001668 × 10⁻¹² ly
25 km2.642502085 × 10⁻¹² ly
30 km3.171002502 × 10⁻¹² ly
40 km4.228003336 × 10⁻¹² ly
50 km5.28500417 × 10⁻¹² ly
60 km6.342005004 × 10⁻¹² ly
75 km7.927506255 × 10⁻¹² ly
100 km1.057000834 × 10⁻¹¹ ly
150 km1.585501251 × 10⁻¹¹ ly
200 km2.114001668 × 10⁻¹¹ ly
250 km2.642502085 × 10⁻¹¹ ly
500 km5.28500417 × 10⁻¹¹ ly
1,000 km1.057000834 × 10⁻¹⁰ ly

How to use: Kilometers to Light-years

  1. 1 Type the value in kilometers.
  2. 2 The result in light-years appears at once – or type in the light-years field to convert back.
  3. 3 Pick a common value, round to fewer decimals or swap the units with one click.
  4. 4 Copy the result, or open “In every unit” to see the value in all units of length.

About this tool

Kilometer (km) is a unit of length (SI); 1 km = 1,000 m. Light-year (ly) is a unit of length (astronomical); 1 ly = 9.460730473 × 10¹⁵ m.

To convert kilometers to light-years, multiply the value by 1.057000834 × 10⁻¹³ (ly = km × 1.057000834 × 10⁻¹³). Example: 10 km = 1.057000834 × 10⁻¹² ly.

Calculated in your browser – nothing you type is sent anywhere.

Frequently asked questions

How do I convert kilometers to light-years?

To convert kilometers to light-years, multiply the value by 1.057000834 × 10⁻¹³: ly = km × 1.057000834 × 10⁻¹³. For example 10 km = 1.057000834 × 10⁻¹² ly.

What is 1 km in light-years?

1 km = 1.057000834 × 10⁻¹³ ly. The other way round, 1 ly = 9,460,730,473,000 km.

How exact is the result?

The converter uses the official definitions of both units and shows up to 10 significant digits; choose 0–6 decimals to round. Both units are defined exactly in terms of each other, so the factor itself is exact.

Can I convert other units of length here?

Yes – choose any of the 22 units of length in the From and To lists, or switch to another measurement at the top.

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