Rain Barrel Yield Calculator

Understand the rain barrel yield calculator result

The practical job of Rain Barrel Yield Calculator is sizing barrels or estimating irrigation capture from a measured roof plan. It asks for roof catchment area, rainfall depth, collection efficiency percent and reports collected gallons. One inch on one square foot is about 0.623 US gallons, adjusted by collection efficiency. A 1,000-square-foot catchment receiving one inch at 85 percent efficiency yields about 529.55 gallons. By exposing collected gallons, Rain Barrel Yield Calculator makes this specific arithmetic inspectable instead of presenting an unexplained number.

With the page defaults of Roof catchment area 1000 sq ft, Rainfall depth 1 inches, Collection efficiency percent 85, the verified output is Collected gallons 529.55. Use horizontal roof footprint, not sloped surface area, for rainfall catchment. In Rain Barrel Yield Calculator, each labeled default remains visible while you edit, so you can change one assumption at a time and trace how collected gallons responds.

Method, limits, and private processing

First-flush diversion, gutter losses, roof material, overflow, water quality, and local rules affect usable capture. Rain Barrel Yield Calculator evaluates the entered values entirely in your browser, without sending the inputs to a server. When using its collected gallons, retain the stated method and input units because this result is bounded by the assumptions of one inch on one square foot is about 0.623 US gallons, adjusted by collection efficiency.