ENGINEERING – CONVERION & CONTANT (ENGINEERING) CALCULATOR
Luminous Flux Lux
A precise tool.
What is the Luminous Flux Lux & How does it work?
Luminous flux, measured in lumens (lm), quantifies the total amount of visible light emitted by a source regardless of direction. When this flux is spread over a surface, the illumination level is expressed as illuminance, measured in lux (lx), which is lumens per square metre. The relationship between these units is linear: dividing the luminous flux by the illuminated area yields the lux value, and multiplying lux by area recovers the original flux.
L = \frac{\Phi}{A}
L = illuminance (lux)
\Phi = luminous flux (lumens)
A = area (m²)
\Phi = luminous flux (lumens)
A = area (m²)
Parameters
Result
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Frequently Asked Questions
How do I convert lumens to lux?
To convert lumens to lux, divide the number of lumens by the area in square meters.
What is the formula for calculating illuminance?
Illuminance (lux) = Luminous flux (lumens) / Area (square meters).
Can I use this calculator to find out how much light a lamp produces?
Yes, if you know the luminous flux of the lamp and the area it illuminates.
How does changing the area affect the lux value?
Decreasing the area increases the lux value, while increasing the area decreases it.
What is the difference between lumens and lux?
Lumens measure total light output, while lux measures light intensity on a surface.
Can I use this calculator for outdoor lighting projects?
Yes, as long as you know the luminous flux of your lights and the illuminated area.
How do I find the area to use in the calculation?
Measure the length and width of the illuminated surface and multiply them to get the area in square meters.
Results are for informational purposes only and do not constitute professional advice.