DAYLIGHT FACTOR CALCULATOR

Estimate average daylight factors based on room geometry, glazing area, and shading configuration.

ROOM GEOMETRY

Room Width (m)

Room Depth (m)

Ceiling Height (m)

WINDOW DETAILS

Window Width (m)

Window Height (m)

Sill Height (m)

SURFACE FINISHES

GLAZING TYPE

ROOM USE

CONTINUE YOUR ANALYSIS

These tools complement your Daylight Factor results — build a complete project specification.

Ventilation Calc

Calculate required ventilation openings per SANS 10400-O for naturally ventilated buildings.

USE TOOL

U-Value Estimator

Estimate composite thermal transmittance for glazing and frame combinations against SANS limits.

USE TOOL

Fabric Guide

Compare openness factors for glare control, view-through, heat rejection and UV blocking.

USE TOOL

DEEPEN YOUR EXPERTISE

Take your specifications to the next level with professional resources.

Academy Courses

CPD-accredited training

Technical Guides

Specification handbooks

Cheat Sheets

Quick-reference cards

PrimeBitz Store

Templates & digital tools

PrimeBitz.com

SEPARATE DIGITAL PRODUCTS STORE

Run Your Practice Smarter with PrimeBitz.com

Digital business resources for professionals — presentation templates, AI prompt bundles, graphic assets, software tools, and more. A separate store by Blind Solutions.

VISIT STORE

Disclaimer: Daylight factor calculations use the BRE split-flux method (simplified). Results are estimates — detailed analysis requires software tools like Radiance or DIVA.