How To Figure Tank For Roof Rain Water Colection

Since rainwater is collected from rooftops you will need to work out the total surface area of roof s that will be used to catch rainwater.

How to figure tank for roof rain water colection.

The resulting figure represents the surface area of your roof in square metres. It is one of the factors in determing your tank size. Call toll free 866 926 5603. It may seem obvious but the first thing to consider when sizing your tank is how much water is available for reuse.

Annual rainfall in millimetres x roof surface area in square metres roof catchment capacity. To work out the surface area simply multiply the length in metres by width for square or rectangular roofs. This simple tank calculator will help you determine how much rain you can capture in a year. This capacity can be calculated using the following formula.

Use our water catchment and water usage calculators below to make your selection easier. To determine the rainwater tank and gallon size that best suits your unique scenario. Besides capture you will need to determine how much water you need i e. There are two driving factors for this variable historical rainfall and available roof space.

Check out our rain water collection calculator to answer your questions. To estimate how many gallons of water you can collect enter the dimensions of your roof including only the section that drains into your barrel. Need help selecting which tank is right for you. Water catchment calculator how much rainwater can you harvest.

Column 1 column 1 column 1 column 1. Collecting rainwater for your garden is a smart idea no matter what your motivation. Rainwater collection calculation formulas and equations roof area ft2 x precipitation amount in x 0 623 amount collected gallons easy formula to remember. 1 of rain on 1 000 sf roof will yield 623 gallons roof area m2 x precipitation amount mm amount collected liters.

The typical equation looks at monthly and annual rainfall totals for a specific location. Calculating your catchment capacity roughly speaking 1 millimetre of rain over 1 square metre of roof equals 1 litre of water. This calculator helps you understand how much you can capture in a year i e.