Roofing Shingle Calculator

Enter your roof dimensions and pitch to estimate shingle bundles, starter strip, ridge cap, nails, and underlayment — then compare the total project cost of 3-tab vs architectural shingles.

Roof Pitch

Roof Length (ft)

Roof Width (ft)

Waste Factor (%)

Pricing (edit to match local rates)

3-Tab Bundle ($)

Architectural Bundle ($)

Starter Bundle ($)

Ridge Cap Bundle ($)

Nails per lb ($)

Felt Roll ($)

Synthetic Roll ($)

Roof Preview

Hover for details • not to scale

Roof Area

1,440 sq ft

14.4 squares (incl. 15% waste)

Shingle Bundles

3 bundles per square

Starter + Ridge

2 + 2

143 LF starter, 40 LF ridge

Roofing Nails

33 lbs

~4,608 nails

Purchase Option	Quantity	Est. Cost
3-Tab + FeltBest value	44 bundles	$1,633.00
3-Tab + Synthetic	44 bundles	$1,663.00
Architectural + Felt	44 bundles	$2,073.00
Arch. + Synthetic	44 bundles	$2,103.00

Best value: 3-Tab + Felt at $1,633.003-tab shingles are the most affordable option but typically last 20-25 years. Architectural shingles cost more upfront but last 30-50 years and offer better wind resistance — often a better long-term value. Synthetic underlayment costs more per roll but covers 2.5x more area and is more durable during install.

Material quantities breakdownUnderlayment: 4 rolls of 15 lb felt (400 sq ft/roll) or 2 rolls of synthetic (1,000 sq ft/roll). All quantities include your 15% waste factor for cuts at hips, valleys, and edges.

This is a material estimate for a simple gable roof. Complex roof shapes with multiple hips, valleys, or dormers will require additional material. Always verify measurements on-site and consult your supplier for exact bundle coverage.