Drywall Calculator
Calculate drywall for walls and ceiling: sheet count, profile meters, screws, and crabs.
Profile consumption depends on type: a partition needs about twice as much
Total area of walls or ceiling in square meters
Standard 1.2 m (Knauf), 1.22 m for some US brands
Common sizes — 2.5 m or 3 m
Calculation formula
Sheets = ⌈Area / (Width × Length) × 1.1⌉; Profile = Area × k (wall 2, ceiling 3, partition 4 m/m²); Screws = Area × 25
10% reserve covers cuts and waste. Profile total includes both UD tracks and CD/CW studs. Screw count assumes 25 cm spacing.
About the drywall calculator
The drywall calculator quickly estimates the number of gypsum boards, meters of metal profile, and screws needed to clad walls, build a suspended ceiling, or assemble a partition. Just enter the total area and pick the construction type.
Calculations use the standard 1.2×2.5 m sheet size with an automatic 10% cut reserve. Profile consumption for UD tracks and CD/CW studs varies by construction: walls average 2 m/m², ceilings 3 m/m², and partitions about 4 m/m².
Everything runs locally in your browser. The result is a ready-to-shop materials list: drywall sheets, linear meters of profile, and TN25/TN35 screw count — enough to head to the hardware store with confidence.
Benefits
Full material list
Drywall sheets, UD/CD profile and screws — all in one calculation by surface area
Three construction types
Walls, ceilings and partitions — each with the correct profile consumption coefficient
Built-in cut reserve
The calculator automatically adds 10% to sheet count to cover cuts and waste
FAQ
What's the difference between regular, moisture-resistant, and fire-resistant drywall?
Regular drywall (grey) is for dry rooms. Moisture-resistant board (green) has hydrophobic additives for bathrooms and kitchens. Fire-resistant board (pink) contains glass fibre reinforcement for boiler rooms, shafts, and escape corridors. Combined moisture+fire-rated boards exist for places that need both.
What stud spacing should I use — 60 cm or less?
Standard CD/CW stud spacing is 60 cm — exactly one third of a 1.2 m sheet, so seams land on a stud. For heavy claddings (tile on backer board, wall-mounted cabinets) reduce spacing to 40 cm. Going below 40 cm rarely pays off — you waste profile without gaining real stiffness.
How many screws per square meter of drywall?
On average 20–25 TN25 screws per square meter at 25 cm spacing along studs and sheet edges. For a double layer the count doubles: the first layer is fastened at 75 cm spacing, the second at the standard 25 cm. Buy screws with a 10% margin — they break and get lost.
Single or double layer of drywall?
Single layer is the standard for living rooms: flat walls, ceilings, regular partitions. A double layer is needed for partitions with extra acoustic insulation, in offices, hotels, and for fire-rated EI60 assemblies. It's stronger against impact, but doubles your sheet and screw consumption.