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light-day | to |
femtometre fermi |

How many light-day in 1 femtometer?
The answer is 3.8606955462749E-29.

We assume you are converting between **light day** and **femtometre**.

You can view more details on each measurement unit:

light-day or
femtometer

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

1 metre is equal to 3.8606955462749E-14 light-day, or 1.0E+15 femtometer.

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

Use this page to learn how to convert between light days and femtometers.

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

1 light-day to femtometer = 2.59020683712E+28 femtometer

2 light-day to femtometer = 5.18041367424E+28 femtometer

3 light-day to femtometer = 7.77062051136E+28 femtometer

4 light-day to femtometer = 1.036082734848E+29 femtometer

5 light-day to femtometer = 1.29510341856E+29 femtometer

6 light-day to femtometer = 1.554124102272E+29 femtometer

7 light-day to femtometer = 1.813144785984E+29 femtometer

8 light-day to femtometer = 2.072165469696E+29 femtometer

9 light-day to femtometer = 2.331186153408E+29 femtometer

10 light-day to femtometer = 2.59020683712E+29 femtometer

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

light-day to span

light-day to zoll

light-day to furlong

light-day to royal foot

light-day to hectometer

light-day to mille

light-day to hvat

light-day to city block

light-day to zettameter

light-day to petameter

A light day (also written light-day) is a unit of length. It is defined as the distance light travels in an absolute vacuum in one day (of 86,400 seconds) or 25,902,068,371,200 metres (~26 Tm).

Note that this value is exact, since the metre is actually defined in terms of the speed of light. The light day isn't very frequently used at all since there are few astronomical objects or distances of that magnitude; the Oort cloud, for example, is thought to extend between 290 and 580 light-days out from the Sun.

The SI prefix "femto" represents a factor of
10^{-15}, or in exponential notation, 1E-15.

So 1 femtometre = 10^{-15} metre.

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