Gutter Length & Downspout Calculator
Calculate linear feet of 5" or 6" rain gutters, downspouts (1 per 35ft rule), end caps, corners, and fascia hangers.
Input Parameters
Enter dimensions and specifications to estimate materials.
Total Gutter Footage
Downspouts Needed
4downspouts
Fascia Hangers (every 2ft)
62hangers
End Caps
4caps
10ft Sections
12sections
Material estimates include recommended trade waste buffer. Always confirm dimensions on site prior to ordering.
How The Calculation Works
Formulas, material coverage assumptions, waste buffers, and rounding standards.
Roof drainage rules recommend at least one downspout for every 35 to 40 linear feet of gutter.
Hidden screw hangers are installed every 24 inches along the fascia board.
End caps are required at the two terminates of every continuous run.
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Frequently Asked Questions
Practical installation guidance and purchasing tips for gutter length & downspout calculator.