Use this calculator to calculate the volume of Rainwater collected in your tank.
Enter the amount of rain in millimetres and the collective Roof area.( Square metres )
One millimeter of rain on one square metre of roof equals one litre
Enter the annual rainfall for your area which will give you the amount of water you could collect.
Download a spreadsheet calculator where you can calculate your annual tank water needs. Tank Calculator
then use the Calculator at
this link to calculate the volume of a rain water tank.
| The rainfall map
is a guide only and is a yearly total. Visit the Bureau of Meteorology for current rainfall: http://www.bom.gov.au |
