Light year to Light second Converter (and vice versa)
Created by: tinycalcs.com/en
Number of supported units: 2
Last update: 2026
This converter allows you to convert light years [ly] to light seconds [ls] or light seconds [ls] to light years [ly]. Calculations are performed in both directions. The calculation result and the entered value are displayed with up to 20 decimal places for maximum accuracy.
Convert light years to light seconds
There are two simple ways to convert light years [ly] to light seconds [ls]. In the first calculation method, the value in light years [ly] is divided by the rounded conversion factor of 3.169 * 10-8. The second method multiplies the value in light years [ly] by 31,557,600.
- Light seconds [ls] ≈ light years [ly] ÷ (3.169 * 10-8)
- Light seconds [ls] = light years [ly] * 31,557,600
The calculation method with a rounded conversion value is more suitable for rough conversions from light years [ly] to light seconds [ls], as the calculation result may contain rounding errors. Therefore, the variant with the exact conversion factor is more suitable.
Convert light seconds to light years
Converting light seconds [ls] to light years [ly] is easy and can be done in two ways. The first method involves multiplication, in which the value in light seconds [ls] is multiplied by the rounded conversion factor of 3.169 * 10-8. The second variant is a division. Here, the value in light seconds [ls] is divided by 31,557,600.
- Light years [ly] ≈ light seconds [ls] * 3.169 * 10-8
- Light years [ly] = light seconds [ls] ÷ 31,557,600
The rounded conversion value can cause rounding errors, resulting in inaccurate calculation results. To ensure that the conversion from light seconds [ls] to light years [ly] produces the most accurate calculation result possible, the conversion should be performed using the exact conversion factor.
Converter
Decimal places
How it's calculated
To all available units
Light years
Megaparsecs
Light years
Parsecs
Light years
Planck length
Megameters
Astronomical units
Megameters
Cable lengths
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