Gutter Calculator
Gutter sections & hangers for your roofline
Replacing gutters? Enter the total roofline length to estimate the gutter sections and hangers you need.
Sizing gutters
Gutters come in 10-foot sections (seamless gutters are cut to length on site). Plan a hanger about every 2 feet, and a downspout for roughly every 30–40 feet of gutter.
Frequently asked questions
How far apart should gutter hangers be?
About every 2 feet, and closer (every 18 inches) in regions with heavy snow.
How many downspouts do I need?
Roughly one per 30–40 feet of gutter, with more for steep or large roofs.