# Conversion from Light year (ly) to Light second (ls) and vice versa

Updated on by Stefan Banse

Here you can convert the Unit of length Light year into the unit Light second and vice versa you can convert Light second into Light year. By clicking the "Swap units" icon, you will always obtain the desired conversion in the calculation result, i.e., ly to ls or ls to ly. With the following calculator you can also calculate any other Unit of length.

A light-year refers to the distance of light (in a vacuum) within one year. There are different definitions for a year (Gregorian year, tropical year, Julian year etc.), therefore the Julian year (365.25 days) was used as a definition for the light year. A light-year is converted to 9,460,730,472,580.8 km, around 9.5 trillion km. For example, the Milky Way is 100,000 light-years long because distance is difficult to measure in kilometers.

One light-second is defined as the light (in a vacuum) travelled in one second. One light-second is converted to 299,792.458 km, around 300,000 km. For example, the average distance between the earth and the moon is around 1.3 light seconds or about 400,000 kilometers.

## Basis for conversion Light year (ly) to Light second (ls) and vice versa

The abbreviation for the "Unit of length Light year" is ly. The abbreviation for the "Unit of length Light second" is ls.

## Formula for the conversion of Light year (ly) to Light second (ls) and vice versa

The calculation from Light year to Light second shall be made using the following conversion formula:

Conversion formula Light year to Light second

Determine the number of Light second from Light year

Light year × 31557600

## Formula for the conversion of Light second (ls) to Light year (ly)

The calculation from Light second to Light year shall be made using the following conversion formula:

Conversion formula Light second to Light year

Determine the number of Light year from Light second

Light second × 3.1688087814029E-8

## Overview table: How many Light year are how many Light second?

Light year ly ⇒ Light second ls
0.01 ly  are  315 576 ls
0.02 ly  are  631 152 ls
0.03 ly  are  946 728 ls
0.04 ly  are  1 262 304 ls
0.05 ly  are  1 577 880 ls
0.06 ly  are  1 893 456 ls
0.07 ly  are  2 209 032 ls
0.08 ly  are  2 524 608 ls
0.09 ly  are  2 840 184 ls
0.10 ly  are  3 155 760 ls
0.20 ly  are  6 311 520 ls
0.30 ly  are  9 467 280 ls
0.40 ly  are  12 623 040 ls
0.50 ly  are  15 778 800 ls
0.60 ly  are  18 934 560 ls
0.70 ly  are  22 090 320 ls
0.80 ly  are  25 246 080 ls
0.90 ly  are  28 401 840 ls
1 ly  corresponds to  31 557 600 ls
2 ly  are  63 115 200 ls
3 ly  are  94 672 800 ls
4 ly  are  126 230 400 ls
5 ly  are  157 788 000 ls
6 ly  are  189 345 600 ls
7 ly  are  220 903 200 ls
8 ly  are  252 460 800 ls
9 ly  are  284 018 400 ls
10 ly  are  315 576 000 ls
20 ly  are  631 152 000 ls
30 ly  are  946 728 000 ls
40 ly  are  1 262 304 000 ls
50 ly  are  1 577 880 000 ls
60 ly  are  1 893 456 000 ls
70 ly  are  2 209 032 000 ls
80 ly  are  2 524 608 000 ls
90 ly  are  2 840 184 000 ls
100 ly  are  3 155 760 000 ls
200 ly  are  6 311 519 999.99999 ls
300 ly  are  9 467 279 999.99999 ls
400 ly  are  12 623 039 999.99999 ls
500 ly  are  15 778 799 999.99999 ls
600 ly  are  18 934 559 999.99999 ls
700 ly  are  22 090 319 999.99999 ls
800 ly  are  25 246 079 999.99999 ls
900 ly  are  28 401 839 999.99999 ls
1 000 ly  are  31 557 599 999.99999 ls

## Overview table: How many Light second are how many Light year?

Light second ls ⇒ Light year ly
0.01 ls  are  0.000000000316880 ly
0.02 ls  are  0.000000000633761 ly
0.03 ls  are  0.000000000950642 ly
0.04 ls  are  0.000000001267523 ly
0.05 ls  are  0.000000001584404 ly
0.06 ls  are  0.000000001901285 ly
0.07 ls  are  0.000000002218166 ly
0.08 ls  are  0.000000002535047 ly
0.09 ls  are  0.000000002851927 ly
0.10 ls  are  0.000000003168808 ly
0.20 ls  are  0.000000006337617 ly
0.30 ls  are  0.000000009506426 ly
0.40 ls  are  0.000000012675235 ly
0.50 ls  are  0.000000015844043 ly
0.60 ls  are  0.000000019012852 ly
0.70 ls  are  0.000000022181661 ly
0.80 ls  are  0.000000025350470 ly
0.90 ls  are  0.000000028519279 ly
1 ls  corresponds to  0.000000031688087 ly
2 ls  are  0.000000063376175 ly
3 ls  are  0.000000095064263 ly
4 ls  are  0.000000126752351 ly
5 ls  are  0.000000158440439 ly
6 ls  are  0.000000190128526 ly
7 ls  are  0.000000221816614 ly
8 ls  are  0.000000253504702 ly
9 ls  are  0.000000285192790 ly
10 ls  are  0.000000316880878 ly
20 ls  are  0.000000633761756 ly
30 ls  are  0.000000950642634 ly
40 ls  are  0.000001267523512 ly
50 ls  are  0.000001584404390 ly
60 ls  are  0.000001901285268 ly
70 ls  are  0.000002218166147 ly
80 ls  are  0.000002535047025 ly
90 ls  are  0.000002851927903 ly
100 ls  are  0.000003168808781 ly
200 ls  are  0.000006337617562 ly
300 ls  are  0.000009506426344 ly
400 ls  are  0.000012675235125 ly
500 ls  are  0.000015844043907 ly
600 ls  are  0.000019012852688 ly
700 ls  are  0.000022181661469 ly
800 ls  are  0.000025350470251 ly
900 ls  are  0.000028519279032 ly
1 000 ls  are  0.000031688087814 ly

## Source information

As source for the information in the "Units of length" category, we have used in particular:

## Last update on November 22, 2020

The last changes in the "Units of length" category were implemented by Stefan Banse on November 22, 2020. The main changes were:

• November 5, 2020: Publication of the Length converter
• Editorial revision of all texts in this category