Roof Project
Start with pitch

Roof and gutter planning tools

Find the calculation for the work in front of you.

Use measured dimensions, product coverage or a quoted rate to make a clear first estimate for a US residential project.

63 tasks listed. Browse the directory below or enable JavaScript to search.

How to begin

Start with the measurement you already have. Each page explains the unit, formula, result and limit before you use the number in a quote or material list.

Check units and estimate limits

A short path through the directory

Start here

These tools cover the first decisions homeowners commonly need to check.

Roof pitch and slopeTurn rise, run or an angle into a roof pitch and slope measures.Gutter installation costEstimate an installed range from length and a stated rate basis.Roof area from footprint and pitchEstimate sloped area when the footprint and pitch are known.Asphalt shingle bundlesEstimate bundles from roof area and the product coverage on the package.Gutter lengthAdd measured gutter runs around the house.Gutter size selectorCompare listed half-round sizes against a rainfall and capacity condition.Roof replacement rangeApply low and high quoted rates to a measured quantity.Gutter cleaning costApply a source-dated cleaning range to gutter length.

Quick check

Try a roof pitch

Use the compact form when you already have rise and run. The full page explains the angle path and the right-triangle relationship.

Try a roof pitch

Example result
6.00:12
Decimal slope0.5000
Slope percentage50.00%
Angle26.57°
Rafter multiplier1.1180

Keep planning

Guides for measuring and quoting

Roof pitch measurementLearn what to measure, how rise and run become an angle, and where a roof pitch estimate stops.Gutter cost planningSeparate linear footage, labor, supplies, removal, disposal, and local price limits before comparing a quote.Roof area from footprintCalculate sloped roof area from a rectangular footprint and one consistent pitch, then use the result for squares and material planning.Roofing squares and shingle bundlesConvert measured roof area into roofing squares and product-specific shingle bundles without relying on a universal bundle rule.Gutter length and sectionsMeasure separate eave runs, total the linear feet, and round the result to the stock gutter section length you plan to use.Half-round gutter sizingCompare listed half-round gutter sizes and downspout capacity from catchment area, rainfall intensity, roof factor and stated capacity.Browse all guidesRead the complete measurement and quote notes.

Using an estimate

Know what a result includes.

Check which measurements, rates and assumptions belong in your estimate. Keep separately quoted work separate, and use each tool within its stated limits.

Read the calculation guide