The Green Johanna Chronicles

The story of hot compost and a rain barrel

Helpful Rainwater Collection Formula

From Wikipedia:  Calculating rainwater collection

Rainwater collection from roofs can be calculated using the following formulas:

  • 1 inch of rain on a 1000 square feet roof yields 623 gallons of water; or
  • 1 cubic foot equals (12 inch by 12 inch by 12 inch cube) equals 7.48 gallons; or
  • 1 millimeter of rain on a 1 square meter surface yields 1 litre of water.

December 17, 2008 - Posted by | conservation, water harvesting | , , , ,

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