Drywall Material Calculator

Enter a room. The calculator gives sheet count, joint compound, tape, screws and corner bead with a waste allowance. Every rule is editable, so you can match your own jobs. Your numbers stay in this browser.

1. Room

Length (ft) Width (ft) Ceiling height (ft) Doors Windows Outside corners (count) Hang ceiling too? Board size

2. Rules (edit to match your jobs)

Waste allowance (%)

Cut loss, breakage, odd sizes.

Door opening (sq ft) Window opening (sq ft) Joint compound (lb per board sq ft)

Default 0.05 lb/sq ft, a common rule of thumb. Check your system's data sheet.

Bucket size (lb, premixed) Tape roll length (ft) Tape (ft per board sq ft) Screws (lb per board sq ft)

Default is 1 lb per 300 sq ft.

Corner bead piece length (ft)

3. Materials

Item	Quantity	Unit price	Cost
Materials total			$0.00

How the numbers are computed

Wall area = 2 x (length + width) x ceiling height, minus door and window openings. Ceiling area = length x width (if chosen). Board area = wall + ceiling. Sheets = ceiling(board area x (1 + waste) / sheet area). Joint compound, tape and screws scale with board area. Corner bead = outside corners x ceiling height, divided by piece length, rounded up.

This tool gives an estimate for planning and does not replace a site measurement or a supplier take-off.

Unit prices are blank by default. Type your local supplier prices to get a cost total.