Roof Joist Calculator
Pick the wrong joist size and the roof either sags or costs far more than it should.
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Lean To Roof Slope Calculator
Get your lean-to roof slope from the rise and the run.
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Roof Painting Cost Calculator
Painting a roof is not a wall-painting job with a bigger brush: pitch multiplies the surface area, elastomeric coatings cover far less per gallon than house paint, and the DIY-versus-pro decision swings the total by thousands.
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Gable Roof Area Calculator
Order shingles for the footprint of your house and you will come up short.
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Average Daily Demand Calculator
Selling 1,500 units last month is a fact, but it is not a plan.
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Gutter Slope Calculator
A gutter drains only as well as its fall.
6 tools
Featured tool
Gable Roof Area Calculator
Works out the true area of a gable roof for ordering shingles.
Use calculatorArea and structure come first, with gable roof area and roof joist tools covering the size and support of the roof itself. Lean-to roof slope and gutter slope handle the angles that decide whether water drains or pools, and roof painting cost covers the finishing job that protects the surface afterward. Average daily demand is filed here too, though it reads more like a general demand tool than a roofing one.