Live tool/tool/roof-rainwater-harvest-calculator

Roof Rainwater Harvest Calculator

Estimate captured rainwater from roof area, rainfall, efficiency, and tank capacity.

HomeWaterSustainability

Roof catchment area

sq ft

Rainfall event

Capture efficiency

Tank capacity

gal

Captured water

1,072.8 gal

Tank fill

107.3%

Overflow / deficit

72.8 gal

Roof area used

1,400 sq ft