#CALCULATE WATTS HOW TO#
So the fan's total energy consumption that night was 150 watt hours.Įasy enough! How to Calculate Watt Hours of an Appliance Here's how to calculate its total energy consumption in watt hours: 50 W × 3 hrs = 150 Wh To convert watts to watt hours, multiply watts times hours.įor example, let's say you have a 50-watt fan, and you leave it on for 3 hours one night.
How to Convert Watts to Watt Hours (W to Wh)
Once you know which appliances are using the most energy, you can choose to use them less often or replace them with energy efficient alternatives.įor example, if you realize that a couple of your lamps still use incandescent lightbulbs, you can replace them with LED lightbulbs which use at least 75% less energy.Īlso, if you want to power stuff with a battery or solar generator - such as when going camping - totaling up how many watt hours all your devices use is an important part in figuring out how big of a battery to buy. This is useful information when trying to reduce your electricity usage and lower your monthly power bill. Here's the formula for converting watts to watt hours:Ībbreviated: Wh = W × hrs Why Calculate Watt Hours?Ĭalculating watt hours tells you how much electricity your devices and appliances use. If that same lightbulb runs for 2 hours, it uses 20 watt hours (20 Wh) of electricity. When talking about devices and appliances, using watt hours is a way of conveying how much electricity they use.įor example, a 10 watt LED lightbulb that runs for 1 hour uses 10 watt hours (10 Wh) of electricity. Or would you instead like to convert watt hours to watts? What Is a Watt Hour? A 10 watt LED lightbulb that runs for 1 hour uses 10 watt hours of electricity.Ī watt hour (Wh) is a unit of energy equal to 1 watt (W) of power sustained for 1 hour. Conversion formula: watt hours = watts × hours
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