# Shadow length

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

### This page exists due to the efforts of the following people:

**Author**- Anton - Shadow length
**Created using the work of**- Anton - Daily shadow growth
- Anton - Shadow length

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:

,

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 :).

Save the calculation to reuse next time or share with friends.

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

Save the calculation to reuse next time or share with friends.

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