Find out by trying our water usage calculator. * Click on each area of the home in turn * Fill in the form then click the "Am I water wise?" button to calculate your usage * Watch the test tube in the area you clicked on change to indicate your result * When you have completed all 5 areas, the "Total Usage" test tube will fill to show your overall score Please note that the usage calculator provides an indication, rather than an accurate picture, of your water usage.