CalcTrockenbau-Rechner (US-Einheiten)
Zuletzt aktualisiert: 2026-05-07
Erhalten Sie die neuesten Rechner und Updates direkt in Ihren Posteingang.
| Wandlänge (m) | Wandhöhe (m) | Plattengröße | Lagenanzahl (pcs) |
|---|---|---|---|
| 4 m | 2.4 m | 2.88 | 1 pcs |
| 6 m | 2.4 m | 2.88 | 1 pcs |
| 8 m | 2.7 m | 2.88 | 1 pcs |
| 10 m | 2.7 m | 2.88 | 1 pcs |
| 12 m | 3 m | 3.6 | 2 pcs |
What is the Drywall Calculator?
Drywall (plasterboard) is sold in standard sheet sizes — most commonly 1.2 m × 2.4 m — and cutting around doors, windows, and electrical boxes creates significant waste. This calculator divides your total wall and ceiling area by sheet size and adds an 8% waste factor to give you the exact sheet count to order.
You may also find the Retaining Wall Calculator, Roofing Shingle Calculator, and Insulation Batt Calculator useful.
Who Uses This Calculator?
This tool is used by homeowners adding or replacing drywall, builders framing interior walls, and renovation contractors estimating material costs.
How to Use the Drywall Calculator
<öl>Formula
The calculator uses the following formula:
Area = Length × Height × layers; Sheets = ceil(area ÷ sheet_size × 1.08)
Worked Example
A room with 60 m² of walls and ceiling using standard 1.2 × 2.4 m sheets requires 60 ÷ 2.88 = 20.8 sheets × 1.08 waste = 23 sheets.
Step-by-Step Calculation
<öl>Common Mistakes to Avoid
- Calculating only the net area without adding waste for cuts around outlets
- Forgetting ceiling drywall — it uses the same sheet size but needs different screws
- Not accounting for double-layer firewall requirements in some rooms
Frequently Asked Questions
12.5 mm (1/2 inch) is standard for most interior walls and ceilings. Use 16 mm (5/8 inch) for fire-rated assemblies and ceilings with 600 mm joist spacing. 9.5 mm is used for curved walls.
Calculate ceiling area separately from walls. For a flat ceiling, it's simply length × width. Vaulted ceilings require calculating the slope surface area using the pitch factor (same as roofing).
Cuts around doors, windows, outlets, and switches create off-cuts that are often too small to reuse. 8% is standard for simple rectangular rooms; complex rooms with many openings may need 10–12%.
Yes — use green board (moisture-resistant) or cement board behind tile in wet areas. Standard drywall absorbs moisture and will deteriorate behind tiles. Cement board is required in shower and tub surrounds by most building codes.
Each coat of joint compound needs 24 hours to dry in normal conditions (20°C, 50% humidity). Speed up drying with fans and heat, or use setting-type compound which chemically hardens in 20–45 minutes regardless of humidity.