Rain Barrel Savings Calculator
Calculate how much rainwater you can collect and save with rain barrels.
Roof area connected to gutters (not total roof area)
Montreal receives approximately 1000 mm of rain per year
Results
Annual Collection
74,320 L
Barrels Needed
6
Annual Savings
$423.62
Each average rain event produces approximately 1,115 L of collection
Methodology & Notes
Calculation based on average Montreal rainfall (~1000 mm/year) and an 80% collection efficiency. Savings are based on City of Montreal water rates (~$5.70/m³). Recommended barrel count is based on an average Montreal rain event of 15 mm.
Get an Accurate Free Estimate
These calculators provide rough estimates. For an exact price, call us or send photos of your project.