Gutter Calculator

Linear Feet, Downspouts & Cost Estimator

The Gutter Calculator returns the linear feet of gutter, the number of downspouts, and the total project cost for a K-style or half-round gutter system. Enter eave length and roof area and the tool sizes the gutter (5" or 6") and recommends one downspout per 35-40 linear feet. Material options include aluminum (most common), steel, copper, and vinyl. Pair the result with our Soffit & Fascia and Drip Edge calculators for a complete eave-line scope.