Drywall Calculator — m, sheets, tape & cost
How to use this calculator
Choose an input mode — single wall, full room perimeter, ceiling, or custom area — enter dimensions in meters, centimeters, or millimeters. Select sheet size and thickness. Subtract doors and windows. Results update instantly with sheets needed, tape, mud, screws, and corner bead.
Tape & Mud — joint tape rolls (150 m/roll), joint compound (covers ~9 m² per coat), 2-3 coats.
Screws — approximately 10 screws per m², ~0.5 kg per 100 screws.
Cost — price per sheet, per tape roll, per mud bucket, per kg of screws. Currency selector: €, zł, Kč, kr.
Saved Calculations
| Time | Mode | Area m² | Sheets | Tape | Mud | Screws | Total |
|---|
How to Calculate Drywall for a Room (Metric)
This drywall calculator estimates the number of plasterboard sheets, joint tape rolls, joint compound buckets, screws, and corner bead pieces for walls and ceilings. Enter dimensions in meters, centimeters, or millimeters, select your sheet size (1200×2400, 1200×3000, or 1200×3600 mm), and set waste allowance from 5% to 20%.
Formulas Used
Net area = gross wall/ceiling area − door openings − window openings.
Sheets = ceil(net area × (1 + waste%) ÷ sheet area).
Joint tape = perimeter joints ÷ 150 m per roll.
Joint compound = net area ÷ 9 m² per coat × number of coats.
Screws = 10 per m² of drywall installed.
Frequently Asked Questions
What size plasterboard should I use? 1200×2400 mm is standard. 1200×3000 mm reduces joints on taller walls. Use 12.5 mm for most walls; 15 mm for fire-rated (EI 60) or acoustic assemblies per EN 520.
How much waste should I plan for? 10% is typical for rectangular rooms. Use 15-20% for rooms with many corners or complex shapes.
