Calculadora de Precisão

Roof Area Calculator

Roof Area Calculator: Calculate a roof section area from measured dimensions. For pitched roofs, measure the actual roof surface or

Dimensões da sala

Fator de desperdício de materiaisOPCIONAL

Estimar o custo do materialOPCIONAL

Calculation Results
1 ft (12 in) 1 ft 1 ft² = 144 in²

Roof Area Calculator

Calculate measured roof-section area. For slopes, measure the surface or apply a separate pitch calculation before ordering materials.

Como funciona

1

Selecione a forma

Choose the shape that matches your space.

2

Insira as dimensões

Insira medições em qualquer unidade. Adicione quantidade, fator de desperdício e preço do material.

3

Obtenha resultados

Visualize a área em pés², pol², jardas², m², acres mais estimativa de custo – tudo de uma vez.

Perguntas frequentes

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.
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.
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.
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.
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.
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