โฌDrywall Calculator PRO
Multi-room estimator with sheet types, finish levels, compound coats, corner bead, vapor barrier, and insulation.
Dimension Diagram โ first room, updates as you type
Wall area comes from the perimeter ร ceiling height, minus door and window openings. Ceiling adds length ร width.
1 Rooms
6 mil poly sheeting โ required in cold climates
Batt insulation โ R-13 to R-30
2 Project & Pricing
Labour Cost
3 Material Breakdown
Project Totals
Results
Material Quantities
Coverage
Cost Breakdown
โ ๏ธ Pre-Export Checklist
- Room dimensions verified on-site
- All openings accounted for (doors, windows, pass-throughs)
- Ceiling height confirmed (standard 8ft or custom)
- Fire-rated drywall needed? (check local code for garages/between units)
- Moisture-resistant board for bathrooms/basements/kitchens
- Vapor barrier required by code in your climate zone?
- Corner bead type confirmed (inside/outside/bullnose)
- Screw type matches stud material (coarse for wood, fine for metal)
How to Estimate Drywall for a Room
Show formulas, finish levels, and worked examples โผ
Formulas
Wall Area= Perimeter ร Ceiling Height โ Openings
Ceiling Area= Room Length ร Room Width
Total Area= Wall Area + Ceiling Area
Sheets Needed= Total Area รท Sheet Area (32/36/48 sq ft) ร (1 + waste%)
Screws= Total Area รท (spacing/12) ร stud_count โ typically 1 screw per 12" o.c. on each stud
Joint Compound= Total Area ร coat_factor รท coverage_per_box
Tape= Total Area ร tape_factor รท coverage_per_roll
Finish Levels (Gypsum Association GA-214)
- Level 0: No finishing โ temporary or non-visible areas
- Level 1: Tape embedded in compound, no further coating โ attic/Plenum spaces
- Level 2: One coat over tape โ utilitarian areas (garage, warehouse)
- Level 3: Two coats over tape โ areas to receive heavy texture or tile
- Level 4: Three coats over tape โ standard residential walls under flat paint
- Level 5: Skim coat over Level 4 โ critical lighting areas, gloss paint, or dark colors
Worked Example
12 ft ร 10 ft room, 8 ft ceiling, 2 openings (21 sq ft each), Level 4 finish:
- Wall perimeter: (12 + 10) ร 2 = 44 lin ft
- Wall area: 44 ร 8 โ 42 = 310 sq ft
- Ceiling area: 12 ร 10 = 120 sq ft
- Total area: 310 + 120 = 430 sq ft
- Sheets (4ร8): 430 รท 32 ร 1.10 = 15 sheets
- Screws (12" o.c.): 430 รท 12 ร 4 studs โ 516 screws
- Compound (Level 4, 3 coats): 430 ร 1.5 รท 300 = 3 boxes
- Tape: 430 ร 0.8 รท 400 = 1 roll
Sheet Types Guide
- 1/2" Standard: Most common for walls in residential construction
- 5/8" Fire Code (Type X): Required in garages, between dwelling units, and for 1-hour fire ratings
- Moisture Resistant (Green Board): Use in bathrooms, kitchens, laundry rooms, and basements
- Soundproof (QuietRock): Reduces sound transmission by up to 90% โ ideal for home theaters, studios, shared walls
Common Mistakes to Avoid
- Forgetting to subtract door and window openings
- Not accounting for ceiling โ walls only estimate
- Under-ordering compound โ Level 4/5 requires significantly more
- Buying exact number without waste โ always add 10%
- Using wrong screw type โ coarse for wood, fine for metal studs
- Skip vapor barrier in cold climates โ moisture leads to mold
Drag to rotate โ Scroll to zoom
Kalkulator Terkait
Frequently used together on the same project.
Client & Quote (prints on PDF & Excel)
Adjustments (applies to exports)
Contingency is added as a separate line on the exported cost summary. Waste % is printed as an advisory reminder.
Project notes (prints on PDF & Excel)
Result compare (A/B)
| Item | Pinned | Current | Change |
|---|---|---|---|
Saved rates auto-apply from your Price Library. Advanced details stay in your browser โ nothing is uploaded except inside your own PDF/Excel exports.
Memperkirakan material gypsum dulunya berarti perkiraan dan sisa. Kalkulator kami menghitung jumlah lembaran, berat adhesive, panjang pita, dan jumlah sekrup dari ukuran ruangan. Pilih ukuran standar 4x8, 4x9 atau 4x12.
Apakah Anda sedang menyelesaikan ruang bawah tanah atau memasang gypsum di ruang besar, jumlah yang tepat mencegah perjalanan mahal ke toko. Kamar tidur 12x14 kaki membutuhkan sekitar 10 lembar 4x8.
Cakupan adhesive tergantung pada tingkat penyelesaian. Level 4 membutuhkan sekitar 0,054 galon per kaki persegi. Level 5 menambahkan pelapisan penuh.
๐ Cara Menggunakan Kalkulator Gypsum
Ukur Dimensi Ruangan
Ukur panjang dan tinggi setiap dinding secara terpisah.
Tandai Bukaan
Catat lebar dan tinggi setiap jendela dan pintu.
Pilih Ukuran Lembaran
Pilih lembaran 4x8, 4x9 atau 4x12.
Pilih Tingkat Penyelesaian
Pilih Level 3, 4 atau 5.
Sertakan atau Kecualikan Langit-langit
Alihkan apakah langit-langit disertakan.
Tinjau Daftar Material
Kalkulator menghasilkan lembaran, adhesive, pita dan sekrup. Pesan 10% ekstra.
๐ Rumus dan Cakupan Gypsum
Area papan: Area = Panjang ร Tinggi. Lembaran: Lembaran = Total Area / Area Lembaran. Adhesive: Level 4 membutuhkan 4,3 pon per 100 kakiยฒ. Pita: Setiap gulungan menutupi 75 kaki sambungan. Sekrup: Dinding 12 inci, langit-langit 8 inci.
โ ๏ธ Kesalahan Umum Pemasangan Gypsum
Tidak mengurangi bukaan
โ Selalu kurangi jendela dan pintu.
Hanya membeli adhesive pita
โ Pita hanya menggunakan 30% dari total.
Panjang sekrup salah
โ Gunakan 1-5/8 inci untuk gypsum 1/2 inci.
Mengabaikan jarak sekrup langit-langit
โ Langit-langit butuh 8 inci.
Mengabaikan orientasi
โ Horizontal = sambungan lebih sedikit.
Mengecilkan adhesive Level 5
โ Level 5 butuh 33% lebih banyak.
Membulatkan ke bawah
โ 16,3 berarti pesan 17.
๐ก Tips Profesional Gypsum
Gantung horizontal bila mungkin
Oleskan lapisan tipis adhesive
Amplas antara lapisan dengan grit 120
Geser tepi lembaran
Biarkan celah 1/8 inci
Beri label setiap lembaran
Pesan 10% ekstra
Gunakan papan tahan kelembaban
โ Kalkulator Gypsum โ FAQ
Sekitar 17 lembar 4x8.
Sekitar 0,6 galon untuk Level 4.
Level 5 menambahkan pelapisan penuh.
Ya, lembaran 4x12 dan Level 4/5.
Sekitar 135.
Ya.
๐๏ธ Proyek Gypsum Nyata
Menyelesaikan ruang bawah tanah 20x25 kaki butuh 38 lembar dan 11 galon adhesive. Pemasangan garasi butuh 45 lembar. Proyek komersial 2000 kakiยฒ butuh sekitar 300 lembar.
Kalkulator gypsum kami memberikan estimasi material yang akurat untuk dinding, langit-langit dan ruangan. Dapatkan rincian lembaran, adhesive, pita dan sekrup secara instan.
โ Method, Sources & Review
Maintained by theBuildingCalc methods deskยท Last reviewedSeptember 23, 2026. This calculator implements the standards and references below; every figure can be rechecked against the formulas and worked example on this page.
Results are estimates, not engineering advice. Verify against local codes and licensed professionals for structural, electrical, and gas work. See ourTerms. Spotted an error? Report itโ corrections ship with the next review.