How Much Rain From 2000 Squar Foot Roof

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

How much rain from 2000 squar foot roof.

When you look at the numbers it s surprising how much water you can collect every time it rains. It is often compared to slope but is not exactly the same. An inch of rainfall on a square foot of surface area yields 623 gallons. So for each inch of rainfall your roof could collect 1 246 gallons of rainwater.

In our example it would be 623 x 2 000 which equals 1 246. If your average rainfall was 25 inches year your annual collection potential is 1 120 x 25 28 000 gallons year. Roof area ft 2 x precipitation amount in x 0 623 amount collected gallons easy formula to remember. Rain barrel supplies list.

It is the middle of july in georgia and both you and your tomatoes are wilting in your yard both looking to the sky and hoping for rain. For example on a 2 000 square foot roof you can collect 2 000 x 0 56 1 120 gallons inch of rain. Multiply the roof dimensions by the number of inches of rainfall. In the united states a run of 12 inches 1 foot is used and pitch is measured as the rise of the roof over 12 inches.

To find how much rain you can collect in an average rain year multiply this number by the average inches of rain. To get an idea how much water the roof of your own house might yield use the rainfall harvest calculator above. Many homes have an asphalt shingle roof but some have wood metal tile and slate which can be more expensive. Rainwater collection calculator in gallons.

Roofing material is estimated by the square which is equal to 100 square feet. Let s take a look at one more example to see how much of a difference collecting rainwater can make if you live in boston massachusetts which gets an average of 42 53 inches of rain per year and you live in a house with 1 000 square feet of roof space 1 000 x 0 6 x 42 53 25 518 gallons of water collected each year in boston ma. 1 of rain on 1 000 sf roof will yield 623 gallons roof area m 2 x precipitation amount mm amount collected liters. Rainwater can be collected from the roofs using the rain water harvesting method.

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. Use our metric system version. Roof pitch is the measurement of a roof s vertical rise divided by its horizontal run. So multiply 623 gallons by the number of surface square feet of your roof.