How Many Gallons Of Rain On My Roof

Although this calculation is simple in principle the units can make it a headache.

How many gallons of rain on my roof.

Rainwater can be collected from the roofs using the rain water harvesting method. For example on a 2 000 square foot roof you can collect 2 000 x 0 56 1 120 gallons inch of rain. Take the dimensions of the footprint of your roof and convert them to inches. You might even want to know how many baths you could get from your rainstorm.

However calctool s unit menus remove this issue doing all the unit conversion for you. To find how much rain you can collect in an average rain year multiply this number by the average inches of rain. Either way you would like to know how much rain has fallen how many gallons have come down from the skies onto your roof yard block or town. To calculate the runoff from any given rainfall.

So multiply 623 gallons by the number of surface square feet of your roof. If your average rainfall was 25 inches year your annual collection potential is 1 120 x 25 28 000 gallons year. 2 every square foot of roof space collects 6 gallons of water in a 1 inch rainfall. The collectable rainwater from the roof can be calculated in gallons using this calculator based on the rainfall and area.

3 to account for losses and inefficiency you can expect to collect about 75 of the actual rainfall so your calculation should be multiplied by 75. You have to admit that whether you re in a drought situation or not it s hard to pass up that much of a free thing. In our example it would be 623 x 2 000 which equals 1 246. If you get about 10 inches of rain over the course of the spring and summer an average 1 360 square foot roof would yield 8 160 gallons of rainwater.

So a 50 x 20 roof is 600 x 240 multiply the roof dimensions by the number of inches of rainfall. In this example 600 x 240 x 1 144 000 cubic inches of water. So for each inch of rainfall your roof could collect 1 246 gallons of rainwater. In the form below choose an area s and a rainfall amount to see how many gallons of water fell from the sky onto that area.

The answer is about 623 gallons. Either way you would like to know how much rain has fallen how many gallons have come down from the skies onto your roof yard block or town. Rainwater collection calculator in gallons. You might even want to know how many baths you could get from your rainstorm.