How much water will I collect?

Use this calculator and chart to work out how much rain you will collect in a year.

How much water have I collected?

Use this calculator to work out how many litres you have collected in the last rainfall.

Rainfall	Collection Roof area	= Water collected
(mm)	(m2)	(litres)

How much water can my tank hold?

This calculates how much water your tank will hold.

Diameter (m)	Height (m)	= Volume of your tank (litres)