Online Lumens to Watts Conversion Calculator

Enter luminous flux in lumens: lm
Enter light source:
Or enter luminous efficiency in lumens per watt: lm/W
       
Power result in watts: W

Converting lumens to watts requires the following formula:

watts = lumens ÷ (lumens per watt)

Lumens to watts Chart:

Lumens Incandescent bulb
(12-18 lm/W)
LED bulb
(80-100 lm/W)
300-450 lm 25 W 4 W
480-720 lm 40 W 7 W
720-1080 lm 60 W 10 W
900-1350 lm 75 W 13 W
1200-1800 lm 100 W 17 W
1800-2700 lm 150 W 25 W
2400-3600 lm 200 W 34 W