"How can I calculate the cost of a 60-W lightbulb left on 24 hours a day? Thank you."
A question from
meredith lasalle February 11, 2016
As on all social media, we post questions exactly as we receive them. They are then translated.
Our answer
A 60-W incandescent bulb left on 24 hours a day costs about $0.10 per day. Here is the calculation:
60 watts x 24 hours = 1,440 Wh/day, so 1.4 kWh/day. At the standardized average rate of $0.0714, we therefore get 1.4 kWh x $0.0714 = $0.10 per day.
By the end a year, you would therefore spend over $37.50 for a bulb that is always on.
Opting for LED bulbs, which typically use 85% less electricity than incandescent bulbs, is an excellent choice. You can visit our Web site to test our tools to help you estimate how much electricity your bulbs and appliances use.
