Gallons Of Water On Roof

If your average rainfall was 25 inches year your annual collection potential is 1 120 x 25 28 000 gallons year.

Gallons of water on roof.

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. To a depth of 1 in 1 hour. 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. A typical outdoor trash can holds 32 gallons.

When you look at the numbers it s surprising how much water you can collect every time it rains. Take the dimensions of the footprint of your roof and convert them to inches. Rain barrel supplies list. Or maybe a low pressure cell has been napping overhead and your arm is hurting from holding that umbrella while you watch your basement fill up with water.

The answer is definitely yes. Convert the amount of rain from cubic inches into gallons. An online drip calculator that calculates the amount of waste from your leaky faucets. Rainwater can be collected from the roofs using the rain water harvesting method.

There are 231 cubic inches of water in a gallon so using our example above divide cubic inches by 231 and you have a total runoff of approximately 1870 gallons of water or 432 000 231 1870 129. A service by the american water works association. For example on a 2 000 square foot roof you can collect 2 000 x 0 56 1 120 gallons inch of rain. Rainwater collection calculator in gallons.

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. Easy formula to remember. Can you get enough water out of the gutter to make it worthwhile. To get an idea how much water the roof of your own house might yield use the rainfall harvest calculator above.

Just a half inch of rain falling on a 1 000 square foot roof will yield 300 gallons of water. 1 of rain on 1 000 sf roof will yield 623 gallons roof area m 2 x precipitation amount mm amount collected liters other water conservation calculators. So a 50 x 20 roof is 600 x 240 multiply the roof dimensions by the number of inches of rainfall. The collectable rainwater from the roof can be calculated in gallons using this calculator based on the rainfall and area.