Daylighting Calculator
Enter your room size, window glazing area and glass type. Get the estimated average daylight factor, how deep daylight reaches, and whether the room gets adequate natural light. Indicative method; confirm with a daylight study for critical spaces.
Your room
Floor area is 168 sq ft; glazing is 11% of the floor (codes often want ≥10%). The model is a simplified average daylight factor — wall colour, depth and sill height all move the real value.
Average daylight factor
0.00%
Rating: Adequate · living/kitchen target ~2%, study ~3%
Daylit depth
17.3 ft
from the window wall
Depth covered
100%
of room depth lit
Window : floor
11%
code wants ≥10%
Effective VLT
0.80
glass light pass
Your room's daylight factor vs typical targets.
Design rooms that fill with light
DesignAI sizes windows, picks glass and places openings to hit healthy daylight levels for your room and climate.
Related Guides — Deep-dive reading
Daylighting Indian Homes and Buildings
NBC 2016 Part 8, IS 2440, and the Science of Natural Light — A Comprehensive Guide for Architects
ConstructionDaylighting Principles for Homes
Why good daylight is a health intervention, not a luxury — and the handful of design rules that decide whether your Indian home feels alive or perpetually switched-on.
Healthy HomesDaylighting Design Using Windows (India): Getting Light Deep Into a Room
How far daylight travels, why tall windows beat wide ones, and when to reach for light shelves, clerestories and top-light
Windows & GlazingRelated Tools — You may also find these useful
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Rate any room's daylight 0 to 100 from window ratio, orientation, glass VLT, obstruction and depth.
Window ToolWindow Size Calculator
Get the right window size, glazing area and openable area for any room using NBC daylight rules.
Window ToolFuture Home Comfort Score
Score your home 0 to 100 on daylight, ventilation, thermal and acoustic comfort and find the weak link.
Window Tool