Expert Guide
House Planning
Door & Window Area Calculator
Quality Inspector
Estimate the total opening area in your walls.
📐 Formula & Method
Area = Width × Height × Quantity.
Area = W × H × Qty
📋 Worked Example
1.2m × 2.1m door: 2.52 m².
❓ Frequently Asked Questions
Main doors are usually 1.0m to 1.2m wide, while internal doors are 0.75m to 0.9m wide. Standard height is 2.1m (7 feet).
Professional House Estimation
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