For those of you out there wanting to save electricity one of the formulas you will need to know is the formula to calculate your kWh usage or elecricity usage. This way you know what each device in your home is using. So you know where you can cut your costs in your home. The information found here will teach you what is a kilowatt hour, how to calculate kWh, convert watts to kWh, and more!
First of all kWh stands for Kilowatt Hours. This is usually what you will see on your electricity bill or electricity statement when you receive it. The electric comany knows how much electricity you are using by reading your kWh meter. You will also have the electricity cost per kWh listed on your electric bill so you know what each kWh is costing you.
A kilowatt hour is a measurment of how many kilowatts are used in a hour. Most electrical devices will have printed on them how many watts they are using, which it takes 1000 watts to equal 1 kilowatt. So a 1000 watt microwave oven running for 1 hour will use 1 kWh.
Watts is a measurement of how much electricity that electrical device uses constantly, where kilowatt hours is how many watts that electrical device has accumulated over time. For example a 60w incandescent light bulb in your closet will use 60 watts everytime it is turned on. But if it is turned on an hour a day while you pick out your clothes that’s 30 hours that light has been on that month. That’s 1,800 watt hours or 1.8 kilowatt hours. Continue reading this information on how to calculate kWh to get the formula used to calculate your kWh usage
But for those of you that are wanting to calculate what each electrical device in your home is using then you will need to use this formula to calculate the kWh usage in your home:
( Watt Usage * Hours/Day * Days/Mo. ) / 1000 = Kilowatt Hours used that month
So for an example we have a normal incandescent light bulb that uses 60w, that we have on 16 hours every day of the month. So I can calculate how many kWh this incandescent light bulb is using every month by using this formula:
60w * 16 hours/day * 30.5 days/mo / 1000 = 29.28 kWh per month
After you know how many kilawatt hours a device is using you can multiply this kWh by the cost per kWh that is stated on your electric bill:
kWh * Cost/kWh = Cost per month
So using the 60w incandescent light bulb example, which was using 29.28 kWh/mo.:
29.28 kWh * $0.10/kWh = $2.928/mo.
So a single 60w incandescent light bulb will cost you $2.93/mo.
NOTE: This is based on $0.10/kWh and also I have the amount of days per month 30.5, I figured this way I don’t have to figure out if this month is 30 days or 31 days.
You have to know how many watts a device is using before you can use any of the formulas found in the information above. Most devices will have the wattage printed on the electrical device somewhere. If your electrical device does not have the wattage printed on it but it does have amperage printed on it, please look at Volt Amp Watt Convert to learn how to convert amps to watts. If your electrical device does not have amperage or wattage printed on it, then you will have to learn How to Measure Amperage with a Multimeter.
For those of you that find calculating your kWh usage using the kWh formula too complicated you can purchase a kWh meter to measure kWh usage.
Thank you for reading this information on How to Calculate kWh on Go Green in Your Home. Go Green in Your Home hopes this information has helped you calculate each of your electrical devices kWh usage so you know how much electricity you are using. For more tips on how to save electricity or save the environment continue reading through Go Green in Your Home!