categories.everyday-life

Instant, private, and free

Lumens to Watts Calculator.

Convert luminous flux to electrical power with a user-entered lamp efficacy; no lamp or regional preset is applied.

On-device calculationNo signup

01

Set your values

Results update as you type.

02 / ANSWER

Luminous flux

Lamp efficacy

Electrical power

8.000000W

Results update automatically as you type.

Scenario arithmetic only. Enter every rate, efficacy, and usage factor; no live or regional data is used.