Sample

##### Gives a vertical object shadow length for given coordinates and time. Also calculates shadow growth during whole day.
Anton2012-03-29 18:52:42

This simple online calculator gives a vertical object shadow length for specified day and geographic coordinate. The calculator uses Sun position algorithm to calculate sun altitude.
Then it uses this formula to calculate shadow length:

$L=h/tan({\alpha})$,

where

h - object height,
a - angle between Sun and horizon.

The calcultor gives zero result if there is no shadow. As you know, this may happen at night time :).

:
°
°

You may also clculate the shadow growth during the whole day using the calculator below: