If we want to calculate the cost, then we simply multiply the kilowatt hour consumption by the electricity tariff set by our electricity supplier per kilowatt hour. And 0.06 kilowatts multiplied by the run time of 10 hours equals 0.6 kilowatt hours. So 60W divided by 1,000 is 0.06 kilowatts. How about smaller items when they’re rated in watts? Let’s say we have a 60-watt light bulb and it’s switched on for 10 hours we still use the formula: Energy = Power x Time, but we need to convert the Watts into kilowatts, as we’re invoiced in kilowatt hours. Two kilowatts multiplied by 0.0083 hours equals 0.0167 kilowatt hours. We can then convert the 30 seconds runtime into hours by dividing the 30 seconds by 3,600. There are 60 minutes in an hour and 60 seconds per minute, so 60 multiplied by 60 gives us 3,600 seconds per hour. So two kilowatts multiplied by three hours equals six kilowatt hours.īut what if the heater only runs for 30 seconds? We can still use the energy formula, but because we’re invoiced in kilowatt hours, we need to convert the seconds into hours. We also know that the power is rated at two kilowatts, and we decide that this heater will run for three hours. We want to know how many kilowatt hours this will use. If you don’t know the power rating of an item, you can buy one of these cheap plugin energy monitors which will tell you the volts, the amps, the watts, and also the kilowatt hours. We can see that this item is rated at two kilowatts. To work out how much electricity will be used by the air heater we saw earlier, we need to know how much power it will demand and how long it will be switched on for. That’s because it takes 1,000 Watts to make a kilowatt. So 100 watts divided by 1,000 is 0.1 kilowatts. You can also convert watts to kilowatts simply by dividing by 1,000. That’s because there’s 1,000 Watts in a kilowatt. So one kilowatt multiplied by 1,000 is 1,000 watts. You can convert kilowatts to watts simply by multiplying by 1,000. If you don’t understand the article so far, then I highly encourage you to watch that first.
#Kwh to kw conversion free
But in this case, a Joule in electrical terms is the amount of energy dissipate as heat when an electric current of one amp passes through a resistance of one ohm per one second.īy the way, we have a free YouTube tutorial on How Electricity Works which you can watch by clicking here. Our food contains energy rated in Joules or Calories, and we consume this to heat and power our bodies. What is a Joule? A Joule is an amount of energy transferred to do some work. To be precise, a Watt means one Joule per second, and a kilowatt hour equals 3.6 megajoules. Kilo means 1,000, and watt is a rate of power named after the engineer called James Watt.
You can see above that the air heater is rated at two kilowatts, and this light bulb is rated at 100 watts. This is the power demanded of the item, it tells us how much energy per second this will demand in order to work. On the electrical goods you’ve purchased, you’ll see a value stated in W or kW, meaning watts or kilowatts. With some calculations, and this will make things a lot easier. Quickly look at what a kilowatt is, and then we’ll come back to kilowatt hours Is rated in kWh, which means kilowatt hour. You buy electrical goods they are rated in W’s or kW’s. Will show you’ve been charged for an amount of kWh’s which we used, and when Now, you’ve probably noticed that your electricity bills Scroll to the bottom to watch our YouTube tutorial video on this article
#Kwh to kw conversion how to
We’re going to cover kilowatt hours, watts, kilowatts, and joules, converting between watts and kilowatts, also how to calculate your kilowatt hour usage with some worked examples towards the end, and lastly how to calculate your monthly electricity bill. KIlowatt Hours or kWh, what are they? In this article, we’re going to be looking at what a kilowatt hour is.
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