Room Lighting Calculator
Multiply your room area by your chosen target lux for a transparent luminous-flux estimate.
Estimated lumens:
A QUICK WALKTHROUGH
How to use this tool
- Enter the room area in square metres.
- Enter your target illuminance in lux.
- Calculate the estimated luminous flux; no fixture count is provided.
User-selected target
The calculation uses only the area and target lux you enter. It does not apply location or room-use factors.
Estimate only
This arithmetic estimate does not select luminaires, guarantee fixture count, or replace lighting design.
GOOD TO KNOW
Common questions
Does this recommend a lux level or fixture count?
No. You provide the target lux, and the tool reports only area × target lux.