## Shadow Length Calculator

You are at 0 0

N

E

You are at 0 0

Your shadow will be 0m long

The current date and time is 0

Zenith is at Dec:0 RA:0

Sun is at Dec:0 RA:0

The angle between the two is 0

You are at 0 0

N

E

You are at 0 0

Your shadow will be 0m long

The current date and time is 0

Zenith is at Dec:0 RA:0

Sun is at Dec:0 RA:0

The angle between the two is 0

Gives a vertical object shadow length for given coordinates and time. Also calculates shadow growth during the whole day.

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

Then it uses this formula to calculate shadow length:

**L = H / tan (a)**

where

h - object height,

a - the angle between Sun and horizon.

The calculator gives zero results if there is no shadow. As you know, this may happen at night time.