Calculadora de Área Online Grátis
Total square footage for rooms, flooring, tiling and painting projects
The Square Footage Calculator finds the area of rectangular, circular, triangular, or L-shaped spaces in square feet, square metres, or square yards. Homeowners measuring for flooring, tiles, or carpets, and tradespeople quoting jobs by the square foot, use it to get accurate area figures without converting between units manually.
Frequently Asked Questions
Sobre Esta Calculadora
Square footage is the most commonly measured quantity in construction and real estate, yet unit confusion — square feet vs. square metres vs. square yards — causes expensive ordering mistakes. A 15 m² room is approximately 161 square feet, but misreading the unit and ordering 15 square feet of flooring covers less than 1.4 m².
This calculator handles common room shapes directly: rectangles, squares, triangles (for diagonal-cut areas), circles (for curved alcoves or pools), and L-shapes without requiring you to sketch the space and add sub-areas manually. Each shape uses the correct geometric formula and converts the result to your preferred output unit.
For flooring and tiling, the calculator includes a waste percentage input — tile cuts along walls and diagonal layouts waste significantly more material than square-on-square layouts. Flooring manufacturers typically recommend 10% overage for straight lay and 15% for diagonal or herringbone patterns.
A Calculadora de Área encontra a área de espaços retangulares, circulares, triangulares ou em forma de L em metros quadrados.
Exemplo Resolvido
Calculating tile quantity for an L-shaped kitchen floor
Entradas:
- Section A: 4.5 m × 3 m
- Section B: 2 m × 1.8 m
- Tile size: 60 cm × 60 cm, waste factor: 10%
Passo a Passo:
- Area A: 4.5 × 3 = 13.5 m²
- Area B: 2 × 1.8 = 3.6 m²
- Total net area: 13.5 + 3.6 = 17.1 m²
- Add 10% for cuts and waste: 17.1 × 1.10 = 18.81 m²
- One 60×60 cm tile covers 0.36 m²
- Tiles needed: 18.81 ÷ 0.36 = 52.25 → order 53 tiles
Dicas
- Add 10-15% overage when ordering flooring to account for cuts, waste and future repairs.