ARCHITECTURE
Window Size Calculator
Dimensions · Glass area · WWR · Daylight · Energy · IBC egress
m²
WWR
Window dimensions
m
m
—
%
Frame area as percentage of total (typical: 10-25%)
Total window area
—
m²
Glass area
—
m²
Frame area
—
m²
Aspect ratio
—
—
Perimeter
—
m
A = W × H | Glass = A × (1 − Frame%)
Window elevation
Window elevation — to scale
Window classification
Type
—
Aspect ratio
—
Glass percentage
—
Suitability
—
Glazing ratio (WWR)
m²
m²
Auto-filled from window dimensions
—
SHGC
Window-to-Wall Ratio (WWR)
—
%
Daylight factor (est.)
—
%
Solar heat gain
—
W/m²
Glazing classification
—
—
Performance
—
—
WWR = Window Area / Wall Area × 100
WWR comparison
Recommended WWR: 15-40% for energy efficiency
WWR compliance
WWR range (15-40%)
✓ OK
Daylight factor
✓ OK
Solar gain
✓ OK
Glazing performance
✓ OK
Thermal performance
W/m²K
°C
°C
W/m²
Typical: 500-1000 W/m²
Heat loss (conduction)
—
W
Solar heat gain
—
W
Net heat flow
—
W
Annual energy
—
kWh/yr
CO₂ emissions (est.)
—
kg/yr
Q = U × A × ΔT | Solar = SHGC × A × I
Energy balance
Heat loss vs solar gain
U-value comparison
Lower U-value = better insulation
IBC egress requirements
m²
m
m
m
people
—
Egress compliance
—
—
Clear opening area
—
m²
Width (min 0.81m)
—
—
Height (min 0.61m)
—
—
Sill height (max 1.1m)
—
—
Area per occupant
—
m²/person
IBC 2018 · R310 · Emergency escape & rescue openings