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Rain harvest Calculator

Rainwater harvesting is the process of collecting and storing rain for later productive use. Harvested Rainwater is rainwater that is captured from the roofs of buildings on residential property. Harvested rainwater can be used for indoor needs at a residence, irrigation, or both, in whole or in part.

Rain Harvest Calculator

m2
mm
liters

Table of Contents:

    Formula

    Rainfall harvest = (RA * AF * 0.9 )

    Where,
    RA - Roof Area
    AF - Amount of Rainfall
    0.9 - Amount of total rainwater expected for harvesting.

    Rainwater harvesting is the gathering, or accumulating and storing, of rainwater for small irrigation and a way to increase ground water levels.

    Example:
    Calculate the Rainfall harvest.
    Enter the Roof area: 25 m2
    Amount of rainfall: 50 mm

    Solution:
    Apply Formula:
    Rainfall harvest = (RA * AF * 0.9)
    Rainfall harvest: 1125 liters