Sheetrock Calculator

Enter room length, width, and ceiling height to get gross wall area (perimeter × height) plus optional ceiling area. Subtract doors and windows for net paintable surface. Sheets = ceil(Net Area × (1 + Waste%) ÷ Sheet Coverage).

Supports standard drywall panels: 4×8 (32 sq ft), 4×10 (40 sq ft), and 4×12 (48 sq ft) in 1/2" and 5/8" thickness. Thicker 5/8" Type X panels weigh about 2.2 lb/sq ft and need 1-5/8" screws.

Joint compound estimated at 0.053 lb per sq ft for a standard 3-coat finish (roughly 1 gallon per 100 sq ft), tape at 0.37–0.4 ft per sq ft, and screws at ~1 per sq ft (32 per 4×8 sheet at 16" o.c., 48 per 4×12 sheet).

Plan outside corner bead (one stick per corner, cut to ceiling height) and edge trim. Includes a waste allowance of 5–10% on trim and bead. One extra bucket of mud is recommended for touch-ups and mid-coat replenishment.

Get detailed cost projections for drywall sheets, joint compound, tape, screws, and corner bead. Adjust unit prices to match local market rates. 2026 material costs run $0.50–$0.80 per sq ft for sheets, tape, mud, and screws combined.

Work in feet, inches, yards, meters, and centimeters. Sheet sizes can be entered in inches or millimeters. All calculations, material counts, and cost estimates update automatically. Fully functional offline with no internet required.