Roof Area Calculator
Calculate measured roof-section area. For slopes, measure the surface or apply a separate pitch calculation before ordering materials.
Kalkulator Presisi
Roof Area Calculator
Roof Area Calculator: Calculate a roof section area from measured dimensions. For pitched roofs, measure the actual roof surface or
Daerah yang Diketahui
Dimensi Ruangan
Beberapa Ruangan
Ruangan (Kaki + Inci)
ft
in
ft
in
Persegi Panjang (Kaki + Inci)
ft
in
ft
in
Dimensi Dinding & Jendela
Dimensi Dinding Katedral
Square Dimensions
Rectangle Dimensions
Perbatasan Persegi Panjang
Circle Dimensions
Circle Border (Annulus)
Annulus Dimensions
Triangle (3 Sides)
Triangle (Base & Height)
Trapesium
Poligon Beraturan
Luas + Kedalaman (Volume)
Faktor Limbah BahanOPSIONAL
%
Perkirakan Biaya BahanOPSIONAL
Calculation Results
Jelajahi Kalkulator Luas Persegi Kami
Pilih kalkulator khusus untuk proyek Anda — ruangan, bentuk, bahan, area luar ruangan, dan konversi unit.
Kalkulator Ruangan → Kalkulator Rumah → Kalkulator Kamar Tidur → Kalkulator Kamar Mandi → Kalkulator Dapur → Multiple Rooms → Kalkulator Persegi Panjang → Kalkulator Segitiga → Kalkulator Lingkaran → Kalkulator Trapesium → Regular Polygon Calculator → Bentuk Tidak Beraturan → Odd Shape → Uneven Sides → Kalkulator Lantai → Kalkulator Ubin → Kalkulator Cat → Kalkulator Beton → Kalkulator Isolasi → Kalkulator Rumput → Kalkulator Halaman → Kalkulator Lansekap → Kalkulator Kolam Renang → Kalkulator Garasi → Kalkulator Atap → Kalkulator Dinding → Feet & Inches → Kalkulator Inci → Height Width Length → Kaki Persegi ke Hektar → Cubic Yards Calculator →
Cara Kerjanya
1
Pilih Bentuk
Choose the shape that matches your space.
2
Masukkan Dimensi
Masukkan pengukuran dalam satuan apa pun. Tambahkan kuantitas, faktor limbah, dan harga bahan.
3
Dapatkan Hasil
Lihat luas dalam ft², in², yd², m², hektar ditambah perkiraan biaya — semuanya sekaligus.
Pertanyaan yang Sering Diajukan
How do I calculate the square footage of a roof?
On a simple gable roof, measure base length and width, then multiply by a slope factor: 1.054 for 4/12 pitch, 1.118 for 6/12, 1.202 for 8/12. Or measure the roof surface directly if you can reach it safely.
What is a "roofing square" and how does it relate to square feet?
One roofing square is 100 sq ft. Shingles and underlayment are sold by the square. Divide roof area by 100 for squares needed. Add 10 to 15% for ridges, valleys, and cuts.
How do I measure roof area from the ground?
Measure the building footprint (length × width) and multiply by a pitch factor for your slope. Satellite tools and roof measurement apps help too. Complex roofs with dormers need each section measured separately.
What waste factor should I use for roofing?
Use 10% for simple gable roofs. Use 15% for hip roofs, dormers, or valleys. Use 15 to 20% for complex roofs with skylights and penetrations. Steep roofs waste more because cuts are harder.
How do I calculate ceiling area vs. roof area?
Ceiling area is flat: room length × width below. Roof area includes slope, so it is larger. A vaulted or cathedral ceiling matches roof area for that section. Flat ceilings match floor area.