RAIN GARDEN CALCULATOR

Fill out our Rain Garden Calculator to estimate how much stormwater your rain garden can capture, redirect, filter, and help clean before it reaches local waterways.

Rain Garden Size Calculator

Estimate the footprint needed for a rain garden based on your roof size, how many downspouts feed it, and how deep you're able to dig. Results are shown for a typical rain event, a suggested weekly total, and a worst-case peak event.

Total area of the roof section(s) draining into this system.

Estimated Footprint