Lumens to watts calculator

Lumens to watts calculator

We are offering Luminous flux in lumens (lm) to the electric power in watts (W) calculator, to help you making your calculation easy, check now! You can simply enter the luminous flux in lumens, and the luminous efficacy in lumens per watt and hit the button to get the power in watts.


* the values of predefined luminous efficacy are the average values.

Formula for Lumens to watts calculation

The formula used for energy saving lamps have the high luminous efficacy (which are more lumens per watt). The power P calculated in watts (W) is apparently equal to the luminous flux ΦV in lumens (lm), which is divided by the luminous efficacy η measured in lumens per watt (lm/W).

P(W) = ΦV(lm) / η(lm/W)

Lumens to watts table

We are presenting here Lumens to watts table to help you in making easy calculations, check now!

light bulb
375 lm6.23 W25 W
600 lm10 W40 W
900 lm15 W60 W
1125 lm18.75 W75 W
1500 lm25 W100 W
2250 lm37.5 W150 W
3000 lm50 W200 W

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