Watts to Lumens Calculator

Watts To Lumens Conversion Calculator

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

Watts to Lumens calculator

It is a conversion calculator used to convert the electric power in watts (W) to the luminous flux in lumen (lm). It has two text fields and two controls, the ‘Calculate’ and ‘Reset’ buttons. They are both active and perform independent functions of the calculator. The ‘Calculate’ button is use to initiate the conversion from watts to lumens after filling all the necessary text fields. The ‘Reset’ button is used to erase all data of the previous calculations from the text fields.

The initial step is to enter the power in watts in the first text field. You will then select the source of light on the options provided by the calculator. If you do not find the particular light source, enter the luminous efficacy in lumen per watt in the next text field. Afterwards, click on the ‘Calculate’ button to execute the conversion. The luminous flux result in lumens will be displayed in the bottom platform of the calculator below the two controls.

For example;

Determine the luminous flux in lumens given the power in watts of a halogen lamp is 250 W.

Solution;
First, you will enter 250 as the value of power in watts. Select halogen lamp in the options provided and then click the ‘Calculate’ button. The luminous efficacy in lumens per watt is displayed automatically after selecting the light source.

The luminous flux result in lumens will be; 5000 lumen (lm)

Formula of converting watts to lumen

Фv (lm) = P (w) x η (lm / W), which means that the luminous flux in lumens is calculated by multiplying the power in watts by the luminous efficacy in lumens per watt.

The watts to lumen calculator delivers accurate results based on the values entered in the text fields. If you want to perform new calculations, click on the ‘Reset’ button. It is the fastest way of erasing all the previous calculations from the calculator.

Related Calculators