This calculator allows to determine the volume needed to store the water
caught from a certain precipitation by a rectangular area.
Calculations vice versa are also possible.

**Usage:**
Always choose the correct unit in the corresponding pull-down-menu before you type a value.
For the input of the area, you may either type the lengths of the sides of a rectangle
to calculate the area. Or you type in the measure of the area. In this case,
the length of the sides of a corresponding square is displayed.

After two values (area, precipitation or volume) have been typed in,
the third value is calculated after a mouse click.

All values may be displayed in other units when you choose that unit
in the corresponding pull-down menu.
Use the "reset" button to reset your calculation.

**Example:**
The forecast predicts 23 mm of rain. What must be the size of a cistern
to store the water caught by an area of 110 m²?
Type "110" into the field for the area. As unit m² had to be chosen before.
Then type the amount of rain ("23") into the corresponding field.
Click on any free space of the window or on the "calculate" button.
Read the result (e.g. 2530 liter).

**Remarks:**

- Please note the remarks about the
representation of numbers..

- There is no warranty for the calculation. Cactus2000 is not
responsible for damage of any kind caused by wrong results.

- Please send an email if you have suggestions or if you would like to see more
conversions to be included.

© Bernd Krüger, 26.01.2013, 12.08.2018