1. Measure your walls
Record the height and width of each wall. For a full room, measure the perimeter and multiply by ceiling height to get total wall area.
Apakah kaki persegi Dinding Kering?
Drywall square footage is the total wall surface area that needs to be covered with drywall sheets, measured in square feet. To calculate drywall square footage, multiply wall height by wall width, then subtract the area of all windows, doors, and other openings. A standard 4×8 drywall sheet covers 32 square feet. Knowing total wall area helps you order the correct number of sheets and avoid costly material shortages or overages.
Bermula
Cara mengira kaki persegi Dinding Kering
To calculate drywall square footage, measure each wall's height and width, multiply to get wall area, subtract window and door openings, then divide by the sheet size (typically 32 sq ft for a 4×8 sheet). Add 10-15% for waste from cuts and fitting around corners.
2. Subtract openings
Measure each window and door opening. Use the Wall with Window shape to automatically subtract these areas from the total wall surface.
3. Get sheet count and cost
The calculator shows net wall area in square feet. Divide by 32 for standard 4×8 sheets. Add a price per sheet or per square foot to estimate total material cost.
Rujukan pantas
Rujukan
1 ekar = 43,560 kaki persegi
1 ela persegi = 9 kaki persegi
1 meter persegi = 10.764 kaki persegi
1 inci persegi = 0.00064516 kaki persegi
Formula asas
Formula Asas untuk Luas
Luas ialah jumlah ruang yang diduduki oleh bentuk 2 dimensi. Bentuk itu boleh jadi lantai, dinding, taman permainan atau padang. Formula paling mudah untuk luas digunakan untuk sebarang bentuk segi empat tepat:
Area = Length × Width
Ukur panjang dan lebar ruang dalam kaki. Darabkan dua nilai tersebut untuk mendapatkan luas dalam kaki persegi. Bilik segi empat tepat yang 12 kaki (3.66 meter) panjang dan 10 kaki (3.05 meter) lebar mempunyai luas 120 sq ft (11.15 sq m).
Ela persegi ialah luas yang diukur dalam ela, dan meter persegi ialah luas yang diukur dalam meter. Ukur dalam kaki, cari luas dalam kaki persegi, kemudian tukar kepada unit yang anda perlukan.
Untuk bilik bentuk L, bahagikan lantai kepada 2 bahagian segi empat tepat, kira setiap luas, dan tambahkan keputusan. Tukarkan semua ukuran kepada unit yang sama sebelum mendarab, jika dimensi anda dalam unit berbeza seperti inci dan kaki.
Formula bentuk
Calculating Segi Empat Sama Footage for Walls
The Drywall Calculator uses wall-specific formulas to calculate net drywall area after subtracting openings.
Wall with Window Bentuk
Calculate drywall area with window cutout
Menggunakan ukuran dalam kaki: Net Area (ft²) = (Wall Height × Wall Width) - (Window Height × Window Width). Measure the full wall first, then subtract each opening. A wall 12 ft wide and 8 ft tall with a 3 ft × 4 ft window has a net drywall area of 96 - 12 = 84 sq ft.
Faktor pembaziran
Menambah 10% Lebihan untuk Bahan
Tambahkan 10% lebihan kepada luas yang dikira untuk mengambil kira pembaziran bahan semasa pemotongan, pecah dan pemadanan corak. Faktor pembaziran ini terpakai untuk lantai, karpet, projek jubin dan bahan landskap.
Luas Asal100 sq ft
+10%
Jumlah Pesanan110 sq ft
Total Material = Area × 1.10
Bilik dengan luas lantai 200 sq ft memerlukan 220 sq ft bahan: 200 × 1.10 = 220 sq ft. Tingkatkan lebihan kepada 15% (darab dengan 1.15) untuk corak pemasangan lantai pepenjuru atau projek jubin kompleks dengan banyak potongan. Kalkulator Kaki Persegi termasuk medan faktor pembaziran untuk pengiraan ini.
Soalan Lazim
Soalan Lazim
How many sheets of drywall do I need?
Calculate total wall area in square feet, subtract window and door openings, then divide by the sheet size. A standard 4×8 sheet covers 32 sq ft. For a room with 480 sq ft of wall area minus 60 sq ft of openings, you need 420 ÷ 32 = about 14 sheets, plus 10% for waste.
How do I calculate drywall for a room?
Measure the perimeter of the room and multiply by the ceiling height to get total wall area. Subtract the area of all windows and doors. A 12×14 room with 8-ft ceilings has a perimeter of 52 ft and a total wall area of 416 sq ft before subtracting openings.
What size is a standard drywall sheet?
The most common drywall sheet is 4 feet × 8 feet (32 sq ft). Other sizes include 4×10 (40 sq ft), 4×12 (48 sq ft), and 4×14 (56 sq ft). Longer sheets reduce the number of seams on taller walls.
Do I subtract windows and doors from drywall calculations?
Yes, subtract the area of windows and doors from total wall area before calculating sheet count. A standard door opening is about 21 sq ft (3 ft × 7 ft) and a typical window is about 12 sq ft (3 ft × 4 ft).
How much extra drywall should I buy for waste?
Add 10% to 15% extra for waste, cuts, and mistakes. For rooms with many openings or corners, use 15%. For simple rectangular walls, 10% is usually sufficient.
How much does drywall cost per square foot?
Standard 1/2-inch drywall costs about $0.40 to $0.65 per square foot for materials only. Installation labor adds $1.00 to $2.50 per square foot depending on complexity. Enter your price per square foot in the calculator to estimate total cost.