# Kilometers to Light-days

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vCalc.Kilometers to Light-days
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The Kilometers to Light-Day calculator converts a measurement of length in kilometers to light-days.

INSTRUCTIONS: Choose units and enter the following:

• (km)  This is the distance in kilometers

Light-Days(LD):  The calculator returns the distance in light-days.  However, this can be automatically converted to other units via the pull-down menu.

#### The Math / Science

A light-day is the distance traveled at the speed of light in one day (24 hours).