Roofing Calculator | EZ Virtual Tools Construction

Roof Dimensions

Building Length (ft)

Building Width (ft)

Roof Pitch

Roof Type

Eave Overhang (in)

Waste Factor %

Complex Roof - Direct Area Entry

Enter the actual roof surface area if known

Total Roof Area (sq ft)

Waste Factor %

Roof Features

Ridge Length (ft)

Hip Length (ft)

Valley Length (ft)

Eave Length (ft)

Rake Length (ft)

Metal Roofing

Roof Area (sq ft)

Panel Width (in)

Panel Length (ft)

Ridge Length (ft)

Eave Length (ft)

Materials Needed

Shingles

0
Roofing Squares
100 sq ft each

0
Bundles
3-tab shingles

Roof Area

sq ft

1.00

Pitch Factor

Underlayment & Accessories

Felt Underlayment

4 sq rolls (15#)

Ice & Water Shield

2 sq rolls

0
Ridge Cap
bundles (25 lf)

Drip Edge

10 ft pieces

Fasteners & Flashing

0
Roofing Nails
lbs (1-1/4")

Step Flashing

pieces

Pipe Boots

standard

Valley Metal

10 ft pieces

Coverage notes:
3-tab shingles: 3 bundles per square (100 sq ft)
Architectural shingles: 3-4 bundles per square
15# felt: 4 squares per roll | 30# felt: 2 squares per roll
Nails: ~2.5 lbs per square (4 nails per shingle)

Roof Pitch Multipliers

Pitch	Multiplier	Degrees	Walk-ability
1/12	1.003	4.8°	Flat - easy
3/12	1.031	14.0°	Low - easy
4/12	1.054	18.4°	Standard - moderate
6/12	1.118	26.6°	Medium - caution
8/12	1.202	33.7°	Steep - difficult
10/12	1.302	39.8°	Very steep
12/12	1.414	45.0°	Extreme - special equipment