Watts to lumens calculator

Electric power in watts (W) to luminous flux in lumens (lm) calculator and how to calculate.

Enter the power in watts, luminous efficacy in lumens per watt and press the Calculate button to get the luminous flux in lumens:

	Enter power in watts:
		W
	Enter luminous efficacy in lumens per watt:
		lm/W		-- select light source -- Tungsten incandescent light bulb Halogen lamp Fluorescent lamp LED lamp Metal halide lamp High pressure sodium vapor lamp Low pressure sodium vapor lamp Mercury vapor lamp	*
	Luminous flux result in lumens:
		lm

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

 

Lumens to watts calculator ►

Watts to lumens calculation

The luminous flux Φ_V in lumens (lm) is equal to the power P in watts (W), times the luminous efficacy η in lumens per watt (lm/W):

Φ_V(lm) = P_(W) × η_(lm/W)

 

Watts to lumens calculation ►

 

---

See also

• Lumens to watts calculator
• Watts to lumens calculation
• Lux to lumens calculator
• Watts to amps calculator
• Watt
• Lighting calculators
• Electrical calculation
• Power conversion

Write how to improve this page