Wall Area Calculator Online

Free tool to calculate wall area, tile quantity, and paint requirements. Accounts for windows, doors, and complex room geometry.

🔒 Client-Side Calculations

All calculations happen in your browser. Your data is not sent to servers.

Length: 4.5 m

Width: 3.2 m

Height: 2.7 m

Room Length m

Room Width m

Wall Height m

Windows and Doors

Number of Windows

Window Width m

Window Height m

Number of Doors

Door Width m

Door Height m

Total Wall Area

0 m²

Without subtracting openings

Net Wall Area

0 m²

Area for finishing

Tile Quantity

0 pcs

With 10% waste

Paint Required

0 L

For 2 coats

Wall Area Formula

S = 2 × (a + b) × h - (n_windows × S_window) - (n_doors × S_door)

💡 How to Calculate Wall Area Manually

To calculate wall area manually:

Measure room length and width in meters
Measure wall height from floor to ceiling
Calculate perimeter: P = (length + width) × 2
Find total wall area: S_total = P × height
Subtract window and door areas from total wall area

⚠️ Important! For accurate material calculation, consider wall irregularities, complex room geometry, and manufacturer recommendations for finishing materials.

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