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5 tools — Roof pitch, deck materials, rafter length, and area — build with precision.
Calculate roof pitch, slope, angle, rafter length, area and material needs from rise and run.
Use calculatorConvert roof slope between pitch, ratio, percent, angle and rise/run — instant conversion for builders.
Use calculatorCalculate rafter length from rise, run and building span — includes overhang and birdsmouth options.
Use calculatorCalculate roof area from footprint, pitch and overhang — includes waste for shingles or metal.
Use calculatorCalculate deck materials: boards, joists, posts, beams, screws and cost from size, board dimensions and spacing.
Use calculatorConstruction mistakes are expensive because materials are bought before errors surface. These calculators front-load the geometry — pitch, rafter length, area, board counts, waste — so the shopping list matches the structure before money changes hands.
Two habits separate smooth builds from costly ones: verifying contractor quotes against independent area math (normalize every bid to cost per square on identical scope), and budgeting realistic waste (5% for simple rectangles, 10% standard, 15% for cut-up roofs and patterned decks). Both take minutes here and save hundreds on site.
Geometry is only half of compliance — spans, loads, footings and fastening follow local codes and span tables. Use these tools for quantity and angle math, and the code book plus professionals for structural decisions.
| Calculator | What It Does |
|---|---|
| Roof Pitch Calculator | Calculate roof pitch, slope, angle, rafter length, area and material needs from rise and run. |
| Roof Slope Calculator | Convert roof slope between pitch, ratio, percent, angle and rise/run — instant conversion for builders. |
| Rafter Length Calculator | Calculate rafter length from rise, run and building span — includes overhang and birdsmouth options. |
| Roof Area Calculator | Calculate roof area from footprint, pitch and overhang — includes waste for shingles or metal. |
| Deck Material Calculator | Calculate deck materials: boards, joists, posts, beams, screws and cost from size, board dimensions and spacing. |