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Convert Kilometres (km) to Light Years (ly)

Result

Quick reference for converting Kilometres to Light Years

Formula
ly = km ÷ 9,460,730,000,000
Quick rough maths
To get the Light Years, divide the Kilometres by 9,500,000,000,000.
Kilometres (km) in 1 Light Year
There are 9,460,730,000,000 Kilometres in 1 Light Year
Light Years (ly) in 1 Kilometre
There are 1.057 × 10⁻¹³ Light Years in 1 Kilometre

Conversion table: Kilometres (km) to Light Years (ly)

0km – 24km
0km0ly
1km1.057001 × 10⁻¹³ly
2km2.114002 × 10⁻¹³ly
3km3.171003 × 10⁻¹³ly
4km4.228003 × 10⁻¹³ly
5km5.285004 × 10⁻¹³ly
6km6.342005 × 10⁻¹³ly
7km7.399006 × 10⁻¹³ly
8km8.456007 × 10⁻¹³ly
9km9.513008 × 10⁻¹³ly
10km1.057001 × 10⁻¹²ly
11km1.162701 × 10⁻¹²ly
12km1.268401 × 10⁻¹²ly
13km1.374101 × 10⁻¹²ly
14km1.479801 × 10⁻¹²ly
15km1.585501 × 10⁻¹²ly
16km1.691201 × 10⁻¹²ly
17km1.796901 × 10⁻¹²ly
18km1.902602 × 10⁻¹²ly
19km2.008302 × 10⁻¹²ly
20km2.114002 × 10⁻¹²ly
21km2.219702 × 10⁻¹²ly
22km2.325402 × 10⁻¹²ly
23km2.431102 × 10⁻¹²ly
24km2.536802 × 10⁻¹²ly
25km – 49km
25km2.642502 × 10⁻¹²ly
26km2.748202 × 10⁻¹²ly
27km2.853902 × 10⁻¹²ly
28km2.959602 × 10⁻¹²ly
29km3.065302 × 10⁻¹²ly
30km3.171003 × 10⁻¹²ly
31km3.276703 × 10⁻¹²ly
32km3.382403 × 10⁻¹²ly
33km3.488103 × 10⁻¹²ly
34km3.593803 × 10⁻¹²ly
35km3.699503 × 10⁻¹²ly
36km3.805203 × 10⁻¹²ly
37km3.910903 × 10⁻¹²ly
38km4.016603 × 10⁻¹²ly
39km4.122303 × 10⁻¹²ly
40km4.228003 × 10⁻¹²ly
41km4.333703 × 10⁻¹²ly
42km4.439404 × 10⁻¹²ly
43km4.545104 × 10⁻¹²ly
44km4.650804 × 10⁻¹²ly
45km4.756504 × 10⁻¹²ly
46km4.862204 × 10⁻¹²ly
47km4.967904 × 10⁻¹²ly
48km5.073604 × 10⁻¹²ly
49km5.179304 × 10⁻¹²ly
50km – 74km
50km5.285004 × 10⁻¹²ly
51km5.390704 × 10⁻¹²ly
52km5.496404 × 10⁻¹²ly
53km5.602104 × 10⁻¹²ly
54km5.707805 × 10⁻¹²ly
55km5.813505 × 10⁻¹²ly
56km5.919205 × 10⁻¹²ly
57km6.024905 × 10⁻¹²ly
58km6.130605 × 10⁻¹²ly
59km6.236305 × 10⁻¹²ly
60km6.342005 × 10⁻¹²ly
61km6.447705 × 10⁻¹²ly
62km6.553405 × 10⁻¹²ly
63km6.659105 × 10⁻¹²ly
64km6.764805 × 10⁻¹²ly
65km6.870505 × 10⁻¹²ly
66km6.976206 × 10⁻¹²ly
67km7.081906 × 10⁻¹²ly
68km7.187606 × 10⁻¹²ly
69km7.293306 × 10⁻¹²ly
70km7.399006 × 10⁻¹²ly
71km7.504706 × 10⁻¹²ly
72km7.610406 × 10⁻¹²ly
73km7.716106 × 10⁻¹²ly
74km7.821806 × 10⁻¹²ly
75km – 99km
75km7.927506 × 10⁻¹²ly
76km8.033206 × 10⁻¹²ly
77km8.138906 × 10⁻¹²ly
78km8.244607 × 10⁻¹²ly
79km8.350307 × 10⁻¹²ly
80km8.456007 × 10⁻¹²ly
81km8.561707 × 10⁻¹²ly
82km8.667407 × 10⁻¹²ly
83km8.773107 × 10⁻¹²ly
84km8.878807 × 10⁻¹²ly
85km8.984507 × 10⁻¹²ly
86km9.090207 × 10⁻¹²ly
87km9.195907 × 10⁻¹²ly
88km9.301607 × 10⁻¹²ly
89km9.407307 × 10⁻¹²ly
90km9.513008 × 10⁻¹²ly
91km9.618708 × 10⁻¹²ly
92km9.724408 × 10⁻¹²ly
93km9.830108 × 10⁻¹²ly
94km9.935808 × 10⁻¹²ly
95km1.004151 × 10⁻¹¹ly
96km1.014721 × 10⁻¹¹ly
97km1.025291 × 10⁻¹¹ly
98km1.035861 × 10⁻¹¹ly
99km1.046431 × 10⁻¹¹ly

Unit information

Kilometre
/ˈkɪləˌmiːtə,kɪˈlɒmɪtə/
Symbol: km
Unit system: SI

What is the Kilometre?

The kilometre is a unit of length and is a multiple of the metre; an SI derived unit. It has the symbol km.

A kilometre is equal to 1000m, 1094 yards and 0.621 miles.

Kilometres is used to measure road distances in the US, though the UK is still using the imperial "sister" miles.

Light Year
/lʌɪt jɪə,jəː/
Symbol: ly
Unit system: Astronomical System of Units

What is the Light Year?

The light year is a unit of length in the Astronomical system of units. It uses the symbol ly.

Often confused with a unit of time as it contains the word "year", it is actually defined by the International Astronomical Union (IAU) as the amount of distance that light travels in a vacuum in one Julian year (365.25 days).

Using the speed of light (299,792,458 m/s or 'c') and the Julian year (as apposed to the Gregorian year which is 365.2425 days), we can equivalate 1 light year as 9,460,730,472,580,800 metres or ≈ 9.46 trillion kilometres.

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