Free Lux to Lumens Calculator
Calculate luminous flux in lumens from illuminance in lux and illuminated area in square metres.
Lux to Lumens Calculator
Enter a value to begin.
How to use this lux to lumens calculator
- Enter the average lux and the surface area receiving that illuminance.
- Check the inputs and preview, then use the primary action.
- Download, copy or use the result shown by the tool.
How the result is calculated
For uniform illumination, lumens equal lux multiplied by square metres. Real beams and surfaces are not perfectly uniform, so this is an idealized relationship.
All calculation and transformation work happens in this browser tab. No entered value is sent to an Noler Tools application server.
Important limitations
Results are provided for convenience and should be checked independently before an important decision. A format or checksum result never authenticates an identity, document, account, licence, vehicle or registration.
Frequently asked questions
Is this lux to lumens calculator free?
Yes. It is free to use and does not require an account.
Does Noler Tools save my input?
No. The input and result remain in temporary browser memory and are not uploaded or saved by this site.