Gallons Of Water Per Square Foot Of Roof

The collectable rainwater from the roof can be calculated in gallons using this calculator based on the rainfall and area.

Gallons of water per square foot of roof.

Or 0312 gallons per minute sq. The square footage of a roof is the same whether it is pitched or flat. Take the dimensions of the footprint of your roof and convert them to inches. Take a guess what is the volume of water that runs off a 1 000 square foot roof during a 1 rain storm.

So if you have 2 500 square feet of roof available for water catchment and a single inch of rain falls one day we see that. Using a 10 000 sq. Roof area the 3 inch rainfall will produce 18 700 gallons in one hour at the rate of 312 gallons per minute. Up to 6 12 7 12 8 12.

Roof area square feet per linear ft of gutter underneath. The answer is about 623 gallons. To calculate the runoff from any given rainfall. In this example you would multiply 7 48 times 600 to get 4 488 gallons of water.

Primary cause for water spillage is debri in the gutter. It doesn t take many sticks leaves or needles to impede the proper flow of. Multiply the cubic feet by the amount of water per cubic foot which is 7 48 gallons. Just multiple the square footage of roof space you have available x 0 6 gallons per square foot per inch of rain and you can see how much water you can collect from each inch of rain that falls.

For example on a 2 000 square foot roof you can collect 2 000 x 0 56 1 120 gallons inch of rain. For example a 3 inch per hour rainfall will build up to a 3 inch depth on a flat roof in one hour at the rate of 1 87 gallons per hour sq. Calculate rainwater collection in gallons rain fall inches. Meaning you can capture about 62 gallons per sq ft.