Roofing Calculators
Work out roof pitch and shingle bundles needed for a re-roof or new build.
Calculators
Which measurement should I take first?
Work out the roof pitch first — it determines the true (sloped) surface area from a flat footprint measurement, and every shingle estimate depends on getting that multiplier right. Once you have pitch and footprint, the shingle calculator converts squares into bundle counts, factoring in waste for hips, valleys, and starter courses.
Suggested project order
- Roof Pitch — establish slope and the area multiplier before ordering material.
- Shingle — convert roof area into bundles and squares needed.