Gutter Calculator
Plan a gutter installation: total run, sections to cut, downspout count from your spacing rule, hidden hangers, miters, end caps and sealant. All spacing rules are configurable.
Gutter Calculator
Roofing & Exterior
ft
ft
ft
in
Gutter sections
15× 10 ft
140 ft total run
Downspouts
4×
16 elbows (2 top + 2 bottom bends each)
Hidden hangers
71×
every 24 in
Miters
8× (corner joints)
End caps + sealant
4 caps · 3 tubes
Calculation breakdown
- 1Sections:
⌈42.67 ÷ 3.05⌉ = 15 - 2Downspouts:
⌈42.67 ÷ 12.19⌉ = 4 - 3Hangers:
⌈42.67 ÷ 0.61⌉ = 71
- Gutters must slope ~1/4 in per 10 ft toward the downspout — plan drop points accordingly.
Sections = ⌈Run ÷ Section length⌉ · Downspouts = ⌈Run ÷ spacing⌉.
Hangers = ⌈Run ÷ hanger spacing⌉ · Miters = corners × 2 · Sealant ≈ 1 tube per 10 fittings.