Gallons Of Water From Roof

To get an idea how much water the roof of your own house might yield use the rainfall harvest calculator above.

Gallons of water from roof.

Also outlined are the steps to build your own rain barrel to collect water from your roof and downspout for all outdoor uses like watering and cleaning. To a depth of 1 in 1 hour. The answer is definitely yes. For sample purposes a 55 gallon barrel will be used.

The system outlined below will walk you through the steps of determining your rain barrel sizes based on average roof runoff. If your average rainfall was 25 inches year your annual collection potential is 1 120 x 25 28 000 gallons year. Can you get enough water out of the gutter to make it worthwhile. 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.

So a 50 x 20 roof is 600 x 240 multiply the roof dimensions by the number of inches of rainfall. 1 inch of rainfall in an hour will cover 1 sq ft. Rainwater collection calculator in 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.

For example on a 2 000 square foot roof you can collect 2 000 x 0 56 1 120 gallons inch of rain. Converting this to gallons per minute per square foot gpm ft 2. Rain barrel supplies list. An online drip calculator that calculates the amount of waste from your leaky faucets.

When you look at the numbers it s surprising how much water you can collect every time it rains. Rainwater can be collected from the roofs using the rain water harvesting method. Take the dimensions of the footprint of your roof and convert them to inches. 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.

The collectable rainwater from the roof can be calculated in gallons using this calculator based on the rainfall and area. 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. A typical outdoor trash can holds 32 gallons. If you capture the rainfall runoff from a storm that just produces 1 10th of an inch of rain onto a 20 by 30 foot roof you end up with a full 32 gallon container full of water with 5 gallons left over.

Easy formula to remember.