Roof drainage material estimator

Gutter Calculator

Estimate gutter linear footage, stock sections, downspouts, corners, waste, and rough material cost from roof-edge measurements. Use it after roof pitch, shingle, or underlayment takeoffs when exterior trim and drainage are next.

Units

Eave length per run (ft)Number of gutter runs Waste / laps (%)Stock section length (ft)Downspout spacing target (ft)Inside corners Outside corners Cost per gutter section ($)Cost per downspout ($)Cost per corner ($)

Gutter sections

Gutter length

Downspouts

Rough cost

Gutters need drainage and attachment checks

This is a material count only. Roof area, rainfall intensity, gutter profile, outlet size, slope, hangers, fascia condition, snow/ice, and local codes can change the final layout.

Android App

Need gutter material takeoffs hands-free?

Use the Android app when you need voice input, offline use, material lists, or PDF export. Free, no ads, no accounts.

Get the Free App Free. Built for Android phones. Donations welcome.

Saved you a mistake? Support VibeCalc

Roof Underlayment Calculator

Estimate roofing roll coverage before trim and gutter takeoffs.

Roof Shingle Calculator

Estimate roof squares, bundles, and waste.

Siding Calculator

Estimate exterior wall siding squares and packages.

View all

Gutter material formula

Order length = eave length × runs × (1 + waste %)

Gutter sections = order length ÷ stock section length

Downspouts = ceiling(order length ÷ target spacing)

Corners = inside corners + outside corners

Sample takeoff

A 40 ft eave on two runs with 10 ft gutter sections, 10% waste, and downspouts every 35 ft needs about nine gutter sections and three downspouts.A 12 m eave on two runs with 3 m gutter sections, 10% waste, and downspouts every 10 m needs about nine gutter sections and three downspouts.

Gutter Calculator FAQ

How does this gutter calculator work?+

It multiplies measured job dimensions by the coverage, spacing, or package yield you enter, adds waste, then rounds the buy quantity up. Use the actual gutter profile and stock lengths from your supplier when possible.It multiplies measured job dimensions by the coverage, spacing, or package yield you enter, adds waste, then rounds the buy quantity up. Use the actual gutter profile and stock lengths from your supplier when possible.

Should I use the default waste value?+

Use the default for a quick planning estimate, then raise it for cuts, odd layouts, breakage, bad access, or product-specific loss.Use the default for a quick planning estimate, then raise it for cuts, odd layouts, breakage, bad access, or product-specific loss.

Is this a bid or code approval?+

No. It is a material planning calculator. Verify product data, local code, structural requirements, electrical requirements, and supplier packaging before ordering or building.No. It is a material planning calculator. Verify product data, local code, structural requirements, electrical requirements, and supplier packaging before ordering or building.