How many light-second in 1 millimeter?
The answer is 3.3356409519815E-12.

We assume you are converting between **light second** and **millimetre**.

You can view more details on each measurement unit:

light-second or
millimeter

The SI base unit for **length** is the metre.

1 metre is equal to 3.3356409519815E-9 light-second, or 1000 millimeter.

Note that rounding errors may occur, so always check the results.

Use this page to learn how to convert between light seconds and millimetres.

Type in your own numbers in the form to convert the units!

1 light-second to millimeter = 299792458000 millimeter

2 light-second to millimeter = 599584916000 millimeter

3 light-second to millimeter = 899377374000 millimeter

4 light-second to millimeter = 1199169832000 millimeter

5 light-second to millimeter = 1498962290000 millimeter

6 light-second to millimeter = 1798754748000 millimeter

7 light-second to millimeter = 2098547206000 millimeter

8 light-second to millimeter = 2398339664000 millimeter

9 light-second to millimeter = 2698132122000 millimeter

10 light-second to millimeter = 2997924580000 millimeter

You can do the reverse unit conversion from millimeter to light-second, or enter any two units below:

light-second to cape inch

light-second to stadion

light-second to fermi

light-second to rute

light-second to pu

light-second to light-week

light-second to pie

light-second to stick

light-second to nautical league

light-second to legoa

A light-second is a unit of length. It is defined as the distance light travels in an absolute vacuum in one second or 299,792,458 meters. Note that this value is considered exact, since the meter is actually (as of 1983) defined in terms of the light second. It is just over 186,282 miles and almost 109 feet.

A millimetre (American spelling: millimeter, symbol mm) is one thousandth of a metre, which is the International System of Units (SI) base unit of length. The millimetre is part of a metric system. A corresponding unit of area is the square millimetre and a corresponding unit of volume is the cubic millimetre.

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