Compare calculators

Both calculators run independently — change the inputs on either side to compare results.

Roofing Materials Calculator

Estimate the number of roofing squares (100 sq ft each) of shingles and underlayment needed for a roof job, factoring in pitch and waste. Use it when planning a re-roof or new construction.

Roof Length (ft)

Roof Width (ft)

Roof Pitch

Waste Factor

Fill in the required fields to see your result.

Construction

Drywall Materials Calculator

Count the exact number of drywall sheets needed for walls and ceiling of a room, minus door and window openings, with a 10% waste allowance built in. Great for estimating before a trip to the lumber yard.

Room Length (ft)

Room Width (ft)

Ceiling Height (ft)

Doors & Windows Area (sq ft)

Drywall Sheet Size

Fill in the required fields to see your result.

Key differences

	Roofing Materials Calculator	Drywall Materials Calculator
Category	Construction	Construction
Inputs required	4	5
Result	Roofing Squares (squares)	Total Drywall Cost ($)
What it does	Estimate the number of roofing squares (100 sq ft each) of shingles and underlayment needed for a roof job, factoring in pitch and waste. Use it when planning a re-roof or new construction.	Count the exact number of drywall sheets needed for walls and ceiling of a room, minus door and window openings, with a 10% waste allowance built in. Great for estimating before a trip to the lumber yard.