Lumens to watts calculator

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

The lumen is a measure of the total "amount" of visible light. The lumen is the SI derived unit of luminous flux (symbol: lm).

Lumens to watts Formula:

P(W) = ΦV(lm) / η(lm/W) provides you helpful and handy calculator resources.