1. Measure walls and ceilings
Measure height and width of each wall in feet. Multiply for wall area.
What is paint square footage?
Paint square footage is the total wall and ceiling area receiving paint. Measure height × width of each wall and sum the areas. Subtract doors and windows from the total.
Bermula
Cara Mengira Rakaman Persegi for Paint
To calculate paint square footage, measure height and width of each wall in feet. Multiply height × width for wall area. Subtract a standard door (21 sq ft) and standard window (15 sq ft) from each wall as needed. One gallon of paint covers 350-400 sq ft per coat.
2. Subtract openings
Subtract doors (21 sq ft each) and windows (15 sq ft each) from total wall area.
3. Convert to gallons
One gallon covers 350-400 sq ft per coat. For 2 coats, divide square footage by 175-200 to get gallons.
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
Harga bahan
Kira Kos Bahan
Quality interior paint costs $25-50 per gallon. Multiply gallons needed by price per gallon for total paint cost.
Terdapat 2 langkah untuk mengira kos bahan:
- Enter the price per gallon of paint and the coverage in kaki persegi per gallon (typically 350-400).
- The Kalkulator Kaki Persegi divides wall area by gallon coverage and multiplies by price for paint cost.
A 1,500 sq ft home interior needs 6-8 gallons for one coat or 12-15 gallons for two coats. Buy 1 extra gallon for touch-ups.
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.
Calculating Segi Empat Sama Footage for Walls
Measure the wall width and the wall height in feet. Multiply the width by the height to get the total wall area in square feet. Subtract the area of any doors or windows to find the exact paint coverage required. A wall that is 12 feet wide and 8 feet tall has a total area of 96 sq ft. A 3 ft × 4 ft window removes 12 sq ft, leaving 84 sq ft of paintable surface.
To subtract multiple windows of the same size from one wall, multiply the window width by the number of windows. Enter the total as the window width in the Segi Empat Sama Foot Calculator. Height remains the height of one window.
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 Asal
100 sq ft
+10%
Jumlah Pesanan
110 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.
FAQ
Soalan Lazim
How do I calculate wall square footage for paint?
Multiply wall height by wall width for each wall, add them together, then subtract window and door areas. A 12x8 ft wall minus a 3x5 ft window = 96 - 15 = 81 sq ft of paintable surface.
How much paint do I need per square foot?
One gallon of paint covers 350-400 square feet per coat. For a room with 400 sq ft of wall area needing two coats, you need approximately 2-2.3 gallons of paint.
How do I calculate paint for a room with 4 walls?
Calculate each wall (height x width), add all four areas, subtract windows and doors. A 12x10 ft room with 8 ft ceilings has about 352 sq ft of wall area (2x96 + 2x80), minus openings.
How many square feet does a gallon of paint cover?
One gallon covers 350-400 sq ft with one coat on smooth surfaces. Textured walls, porous surfaces, and dark-to-light color changes may require more paint, reducing coverage to 250-300 sq ft per gallon.
Should I subtract windows and doors from paint area?
Yes, subtract all openings. A standard window is about 15 sq ft (3x5 ft) and a standard door is about 21 sq ft (3x7 ft). This prevents buying excess paint.
How do I calculate paint for a ceiling?
Multiply room length by room width for ceiling area. A 12x10 ft room has a 120 sq ft ceiling. One gallon of ceiling paint covers 350-400 sq ft, so one gallon handles most single rooms.
RUJUKAN
Bacaan Lanjut & Rujukan
Sumber luar yang dipercayai dan bahagian berkaitan di laman ini. Pautan luar membuka rujukan berwibawa di Wikipedia dan agensi kerajaan.
Terokai Laman Kalkulator Kaki Persegi
Rujukan luar yang berwibawa
- WIKIPaint — Wikipedia
- WIKIInterior design — Wikipedia
- GOVEPA: Lead Paint Safety