Door & Window Opening Planner

Inputs

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Room
m²
Doors
m
m
Windows
m
m
Lintels
mm
Doors and windowsGlazing 14.4 % of floor1 doors · 2 windows (schematic)myconstructioncalculator.com
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Results

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Glazing as % of floor area
14.4%, meets 8% (IRC R303.1)
Openable area as % of floor7.2 %, meets 4%
Total opening area4.77 m²
Window lintels2 × 1.50 m
Door lintels1 × 1.20 m
Frame perimeter (sealant / trim)14.70 m

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Working
  1. Glazing = 2 × 1.20 × 1.20 = 2.88 m² = 14.4% of 20.00 m²
  2. Openable = 2.88 × 50% = 1.44 m² = 7.2% of the floor
  3. Lintel = clear width + 2 × 150 mm bearing

Results are estimates for planning and material ordering only. They are not a substitute for structural design or approval by a qualified engineer. Read the full disclaimer.

Door & Window Opening Planner byMy Construction Calculator: free construction calculators with the working shown.