Free Online Natural Light Estimator

Rule-Based Daylight Assessment for Your Space

Dark Mode

Metric (m, m²)

Imperial (ft, ft²)

Room Parameters

Room Length

m

Room Width

m

Number of Windows

Window Width (each)

m

Window Height (each)

m

Window Orientation

Geographic Location

Obstruction Level

Glazing Type

Has Skylight

Light-colored walls

Strategic mirrors

Results

Enter your room parameters and click "Calculate Daylight"

This tool will estimate how much natural light your space receives based on window size, orientation, and other factors.