Gallons Of Water On Roof

For example on a 2 000 square foot roof you can collect 2 000 x 0 56 1 120 gallons inch of rain.

Gallons of water on roof.

Rainwater can be collected from the roofs using the rain water harvesting method. 1 inch of rainfall in an hour will cover 1 sq ft. Roof area ft2 x precipitation amount in x 0 623 amount collected gallons easy formula to remember. Take the dimensions of the footprint of your roof and convert them to inches.

The answer is about 623 gallons. Roof area m2 x precipitation amount mm amount collected liters. For every 1 inch of rain and 1 000 square feet of roof you capture about 620 gallons of water. If your average rainfall was 25 inches year your annual collection potential is 1 120 x 25 28 000 gallons year.

This means that each square foot captures about 62 gallons per inch of rain. Rainwater collection calculator in gallons. To a depth of 1 in 1 hour. 1 of rain on 1 000 sf roof will yield 623 gallons.

How much will your roof be able to capture. Rainwater collection calculation formulas and equations. In this example 600 x 240 x 1 144 000 cubic inches of water divide by 231 to get the number of gallons because 1 gallon 231 cubic inches. To find how much rain you can collect in an average rain year multiply this number by the average inches of rain.

Simply take your roof s square footage and multiply by 62. To calculate the runoff from any given rainfall. Required roof drainage flow rate in gallons per minute 0 0104 x rainfall rate x roof area where rainfall rate is expressed in inches per hour and roof area is given in square feet.