Use our metric system version.
2000 sqft roof 1inch of rain how much water.
Rain barrel supplies list.
For example on a 2 000 square foot roof you can collect 2 000 x 0 56 1 120 gallons inch of rain.
Surprisingly a single quarter acre of land in the city can harvest over 100 000 gallons of water annually.
36 4 x 46 4 2 000 sq ft your roof catchment area is thus 2 000 square feet.
Just a half inch of rain falling on a 1 000 square foot roof will yield 300 gallons of water.
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.
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 if you have 2 500 square feet of roof available for water catchment and a single inch of rain falls one day we see that.
This calculation assumes a 90 efficiency.
When you look at the numbers it s surprising how much water you can collect every time it rains.
To find how much rain you can collect in an average rain year multiply this number by the average inches of rain.
Rainfall calculator english units how much water falls during a storm.
How much rainwater can i collect from my roof.
To get an idea how much water the roof of your own house might yield use the rainfall harvest calculator above.
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.
Since one inch of rainfall provides approximately 600 gallons of water for a 1 000 square foot catchment area and our theoretical house has a 2 000 square foot catchment area twice the area you will multiply 600 gallons by 2.
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.
Take the dimensions of the footprint of your roof and convert them to inches.