Watts to lumens calculator

Watts to lumens calculator

We are offering the Electric power in watts (W) to luminous flux in lumens (lm) calculator to let you have easy calculations. Enter the value of power in watts, and the value of luminous efficacy in lumens per watt and finally hit the Calculate button to find results for luminous flux in lumens.


* the predefined values of luminous efficacy are actually typical / average values.

Watts to lumens calculation

We all know that energy saving lamps have high luminous efficacy which is more lumens per watt. The luminous flux ΦV measured in lumens (lm) is apparently equal to the power P in watts (W), multiplied by the luminous efficacy η measured in lumens per watt (lm/W).

ΦV(lm) = P(W) × η(lm/W)


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