Calculadora de tejas
Calculate how many shingles you need for your roof. Enter your house footprint and roof pitch to get roof area, roofing squares, shingle bundles, and underlayment rolls, including waste for cuts, ridges, and starter strips.
Preguntas frecuentes
How many bundles of shingles do I need per square?
Three bundles of standard 3-tab or architectural shingles cover one roofing square (100 sq ft). Some heavyweight designer shingles come 4-5 bundles per square, so check the wrapper before ordering.
How do I figure out my roof pitch?
From inside the attic, hold a level horizontally against a rafter, measure 12 inches out, then measure straight down to the rafter. That vertical measurement is your pitch: 6 inches down means a 6/12 pitch. You can also estimate it visually: most homes are 4/12 to 8/12.
How many squares is an average roof?
A typical 2,000 sq ft single-story home has a roof of roughly 22-26 squares once pitch and overhangs are factored in. Two-story homes of the same size have smaller footprints, so their roofs are usually 13-17 squares.
How much waste should I add for shingles?
Add 10% for a simple gable roof and 15% for roofs with hips, valleys, dormers, or skylights. Complex roofs generate more cut waste, and you want leftover shingles from the same lot for future repairs.
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