Now calculate as 4.4Ah x 11.1 volts = 48.8 Wh. Since 1 AH is equal to 1,000 mAH (milli-Ampere-Hours), the capacity is 2.5AH. Enter the electric charge in milliamp-hours (mAh) and voltage in volts (V) and They can also tell you how much energy a battery stores. Solar Output (kWh/Day) = PowerRating \times PeakSunHours \times 0.75 Broadly speaking, here is how much losses are incurred when electricity passes through the following electric circuit elements: Inverter losses. The battery's nominal voltage (V); and its capacity in ampere-hours (Ah). The number before the "s" is the number of cells in series while the one by the "p" is number in parallel. P (kW) = I (A) V (V) / 1000. [3] 3 Divide the result by 1,000. This is useful information when trying to reduce your electricity usage and lower your monthly power bill. press the Calculate button: The energy E(Wh) in watt-hours is equal to the electric charge Q(mAh) in milliamp-hours times the August 26, 2022, Pros and Cons of Travelling With the Lightest Electric Wheelchair Also, 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. BTU/h is often abbreviated to just BTU to represent the power of appliances. Manage Cookies. Whether you're going off-grid or just looking to get the most solar bang for your buck, we have you covered with the latest tips and information about the cleanest energy on the planet. To convert W to Wh, you need to multiply the number of Watts by the number of hours: Then fill in this box with the duration in hours and click on Calculate. May 12, 2018, How to calculate Battery Watt-Hour (WH) Rating Use the watts to heat calculator to know the power you need to heat a particular substance. One joule equals approximately the amount of energy it takes a person to lift a quarter pound potato ten inches off the ground, or moving a 40-pound suitcase three feet. September 22, 2022, Top 10 Lightest Weight Electric Wheelchairs in the USA Unfortunately, board manufacturers don't always provide the Wh for their boards on the product page. This calculator converts a battery or battery packs Watt hours (Wh) rating into its Amp Hours rating. A battery rated at 36 V and 10.4 Ah will have a 417.6 Wh capacity (36 x 10.4 = 374.4), like on the Eunorau UHVO All-Terrain Ebike. Instead, your energy consumption will be listed in kilowatt hours (kWh). Calculate. Note: The label is usually on the back or bottom of the appliance. The important info about the configuration is how many cells are in series and how many in parallel. If you're a frequent traveller, you may be aware of that whether or not a lithium battery can be brought on board depends on its Watt-Hour (WH) rating. Here's how to calculate how many watts your TV uses when on: So, in this example, your TV uses 98 watts when turned on. For individual batteries enter the Volts rating of the battery and the Watt hours rating of the battery and click on the calculate button to . Use our interactive calculator to easily convert watts to watt hours (W to Wh): Or would you instead like to convert watt hours to watts? The power P in kilowatts (kW) is equal to the current I in amps (A), times the voltage V in volts (V) divided by 1000:. For my blender, the label says its voltage is 120 volts. To calculate watt hours of a battery, multiply amp hours times volts. Recently, many of these companies have been putting, https://dkwan.com/how-to-convert-to-watt-hours/. Yep, fridges use a lot of electricity. For example, if you have 100 watts of light flowing in four hours then that means your bulb has used 400 watt hours or WHs worth of energy. Watt is a unit of measure for power while Watt-hour (Wh) measures energy. Wait as the monitor records the appliance's electricity usage. The way to calculate this is to use the voltage of the battery, and multiply it by the capacity. A typical residential fridge uses 500 kWh per year which translates into 50kWh per month. Note: Most TVs consume a little power when turned off as well, so you could also repeat this test with the TV off to see how much power it uses then. For 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. For example: 100 watts running over four hours would be 400 Wh or 400 Joules in one hour. Here's how to calculate its total energy consumption in watt hours: So the fan's total energy consumption that night was 150 watt hours. A Megawatt equals one million watts. voltage V(V) in volts (V) divided by 1000: So watt-hours is equal to milliamp-hours times volts divided by 1000: watt-hours = milliamp-hours volts / 1000, We also have to divide the total by 1000 since 1 kilowatt (1 kW) is equal to 1000 watts (1000 W). You can use the numbers printed on a battery to calculate a number for its capacity in Wh if its not already there. Press Esc to cancel. The label should also list the voltage, which is usually 120 volts in the US and Canada. To calculate the Wh of an ebike battery pack, we simply multiply its V and Ah to get the Wh. About | The formula is (W)* (h) = (Wh). Easy Calculation. I'll cover two ways to find out how many watt hours an appliance uses: Look at the appliance label or product manual for its claimed energy usage. Recall that I estimated my kettle's electricity usage to be 120 Wh per day. This applies to lithium metal batteries (disposable) and lithium ion batteries (rechargeable). Pack Voltage: 36.00 V. Watt Hour Rating: 216.00 Wh. Footprint Hero is where Im sharing what I learn as well as the (many) mistakes Im making along the way. Type above and press Enter to search. Im a DIY solar power enthusiast on a journey to learn how to solar power anything. What Is a Watt Hour? The calculator will calculate the battery life if the Watt Hour and the battery voltage is known. But much of the time, it is not stated. So, youve seen the term Watt Hour pop up a lot lately. Lets say your fridge uses on average 500 watts. Refrigerators only draw power about of the time, or about 8 hours a day if you never unplug them. For example, an AC marked with a label of 12,000 BTU actually has a power requirement of 12,000 BTU per hour. Convert kilowatt hours (kWh) to watt hours (Wh) if necessary. Let's say you have a 12V 50Ah car battery. Set up your monitor, if needed. Power Consumption (Annual) = Power Usage (Watts) x Time (Hours) x 365 (Days) Example: A 1700 Watts Electric kettle runs for 1 hours daily. No, a watt is the unit of measurement for power that equals one joule per second. That said, the Yeti 1000 is a larger battery so it can power more devices than a smaller capacity battery like the Goal Zero Sherpa 100 which has a storage of 200 watt-hours and only enough energy to run an average laptop charger at maximum 20 watts or charge your phone roughly three times before needing to be recharged. How to calculate watt-hours To calculate the relationship between charge in amp hours and voltage in volts, the formula should be used: \rm Wh = Ah V Wh = Ah V 1 amp hour is equal to 1000 milliamp hours, so if you want to convert watts to kilowatt-hours you can simply divide the result by 1000: \rm Wh = mAh V / 1000 Wh = mAh V/1000 The calculated Ah is the minimum amp hours your battery should have to power your device for that time period. We and our partners use cookies to Store and/or access information on a device.We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development.An example of data being processed may be a unique identifier stored in a cookie. Annual power usage in kWh = 620500 Wh /1000 = 620.5 kWh / year. Inverter is the main source of electric output loss. Kilowatt-hours (kWh) = Watts Times (Hours) / 1000. Watt hours tell you how much energy an appliance uses. It runs for 24 hours a day. Putting batteries in series increases the voltage while more in . In reality it's only 80 Wh -- 33% less than my estimate. How many watts is a kilowatt hour. In this blog post we will talk about what a Watt hour is, and how to calculate them. How to Convert Milliamp Hours to Watt Hours (mAh to Wh) 1 amp hour is equal to 1000 milliamp hours. Let's run through the final steps using my kettle as an example. When talking about devices and appliances, using watt hours is a way of conveying how much electricity they use. For air conditioning and heating units, make separate calculations for each season. Further on, you'll also find a chart of Wh to Ah for 120V and 220V. So we calculate the power capacity as Volts times Amps times hours equals capacity in Watt-Hours. Amp Hour to Watt Hour Conversion Calculator This calculator converts a battery or battery packs Watt hours (Wh) rating into its Amp Hours rating. Here is a nifty amp-hour calculator that converts watt-hours to amp-hours. So if a 5 Volt battery has 20 Watt Hour rating, and, it draws 2 Amp current, then the Watt delivered by Battery = 10 Watts ( 5 Volts x 2 Ampere). It means you must first get the Ah rating. So, to convert milliamp hours to watt hours, you multiply millamp hours by volts and then divide by 1000. Amp-hours = Watt-hours / Volts. The way to calculate this is to use the voltage of the battery, and multiply it by the capacity. You won't see the words "watt hours" on your power bill. RapidTables.com | As a point of reference, the average refrigerator uses 500 kWh per year or 50kWh per month and 5000 kWh would be equal to five hundred thousand watt-hours. To estimate the range on a board, you first need to know how much power the battery can store. Easy to read . See also: The formula for calculating watt-hours is Watts x Hours = Wh. A Watt Hour (Wh) is a unit of measurement for power over time (an hour). Firstly, the options are much more limited for a disabled person compared to an able-bodied individual. As an Amazon Associate I earn from qualifying purchases. Most of the time the Amp and the hour have already been multiplied so the equation is just Volts times Amp hour equals Watt hour. Step 2: Determine your hours of use per month. For the watt-hour to amp-hour conversion, you also need voltage (V). For example, a 10 watt LED lightbulb that runs for 1 hour uses 10 watt hours (10 Wh) of electricity. In like manner, the rate at which your sun-powered energy structure "streams" power into your house is estimated in watts. The amp hour per cell is based on the 18650 model that the pack uses (a common one is the Samsung 30Q). ---------------------------------------------------------------. You can use it to -- you guessed it -- measure how much electricity an appliance uses. Plug in Watt Hour Meter Electricity Energy Usage Monitor . Ross' writing also helps educate others about the benefits of greener living and renewable resources. Then multiply kilowatts times hours. For example, let's say you have a 50-watt fan, and you leave it on for 3 hours one night. Convert minutes to hours if necessary by dividing minutes by 60. For appliances like fridges and dryers, you may have to pull them out to find it. I used an electricity monitor called Kill A Watt, into which I plugged my electric kettle. We can figure this out by calculating the battery's watt-hour (Wh) rating. Agree to the our terms and policy agreement. Buy the world'slightest motorizedmobilitychair! Formula: watt hours = watts hours Abbreviated: Wh = W hrs Example Let's say you have a fan that consumes 100 watts when on. For instance, I estimate that use my electric kettle 6 minutes per day. On a battery, Watt Hours (Wh) are used to measure its capacity. More information can be found here. 3.2V 20A Low Temp LiFePO4 Battery Cell -40 3C discharge capacity70% Charging . This number is the total voltage of the battery pack (putting cells in parallel doesn't change the voltage). The 12s3p has 12 cells in series and then 3 sets in parallel for a total of 36 cells (12 x 3). By comparing the watt-hours of different packs, we can easily tell which one will provide more range. To work out the amp hours, you simply need to divide the watt-hours by the voltage. It is 4400/1000= 4.4ah. A kilowatt equals one thousand watts and its used as the measurement unit in power plants all around the world. To do that, you divide the number of watts by 1,000. Here's how: Plug the monitor into the wall, then plug your appliance into the monitor. Electric charge in milliamp-hours (mAh) to energy in Watt-hours (Wh) calculator. 4.0 4.0 . The best place to look would be on the battery itself. Share via. The consent submitted will only be used for data processing originating from this website. The cost to run a 1500-watt heater per hour is $0.1563, which equals $3.7512 per day and $113 per month for a 24h usage. So 100 W is 0.1 kW, 60 W is 0.06 kW, and 1500 W is 1.5 kW. 4.2 4.2 . The first question most people ask themselves when they start looking into solar power is: How many solar panels do I need? Therefore, the WH rating on this battery is 10.8 V x 2.5 AH = 27 WH. 1 BTU = 0.2931 watt-hours 1 BTU = 0.0002931 kWh 1 kWh 3412 BTU BTU/h, BTU per hour, is a unit of power that represents the energy transfer rate of BTU per hour. Locate the energy usage total on your monitor, which will be displayed in watt hours (Wh) or kilowatt hours (kWh). As an example, a Yeti 1000 Lithium has 1250 watt-hours of energy storage which means it can power devices at the maximum 100 watts for 12.50 hours. . So, if you have 100 watts running over four hours that equals 400 WHs (100400). The battery will last 2 hours. If you want to know how many kWh an appliance uses, and already know how many watts it uses, the calculation is pretty straightforward. For instance, a 100 W light uses energy at a higher rate than a 60 W bulb; this implies the 100 W light needs a greater "stream" to work. Calculate the energy consumption in Wh and kWh in one year. Energy efficiency . Are Portable Solar Panels Effective? 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. P d = V CE X Ic The product V CE X Ic must not exceed the maximum power dissipation rating, P d (max), of the transistor. If it doesn't, look up the standard outlet voltage for your country and use that. So divide the mAh rating by 1000. So, if you have 100 watts running over four hours that equals 400 WHs (100400). To calculate the kWh for a specific appliance, multiply the power rating (watts) of the appliance by the amount of time (hrs) you use the appliance and divide by 1000. When you have the Wh, you have to convert Wh to Ah. You may have been wondering what it is and how to calculate them? E = V I T Hopefully, you remember that amp hours are a measure of electric charge Q (the battery capacity). DC cable losses. Customer ratings by feature . Accuracy . To convert watts to watt hours, multiply watts times hours. Here's the formula for converting watts to watt hours: Calculating watt hours tells you how much electricity your devices and appliances use. Copyright 2022 Footprint Hero LLC. 10s2p 3.0Ah (Samsung 30Q cells)10 series * 3.6v = 36v3.0Ah * 2 parallel = 6Ah36v * 6.0Ah = 216Wh, 12s3p 3.0Ah (Sony VTC6)12 series * 3.6v = 43.2v3.0Ah * 3 parallel = 9Ah43.2v * 9.0Ah = 388.8Wh, Other resources:https://dkwan.com/how-to-convert-to-watt-hours/https://dkwan.com/how-to-estimate-range/. How To Clean Solar Lights & Solar Panels? A lot of datasheets will give you a Power Dissipated value Pd in watts.Power calculation formula. Kilowatt-hours are calculated by multiplying watts by hours of use. You decide how long to wait. For example, if you have 100 watts of light flowing in four hours then that means your bulb has used 400 Watt Hours (WH) worth of energy. He loves saving money anywhere he can, as well as helping people do the same. This can be calculated by multiplying the Ah in each cell * parallel count. A 100ah battery is equal to 12.50 kWh or 250 Wh which means it has enough power for an average laptop charger, Goal Zero Yeti 1000 Lithium, and Sherpa 50 all to run at maximum capacity simultaneously before needing recharged again. Watt meter power consumption analyzer can calculate the power expenses of the measured appliance automatically. Formula: watt hours = watts hours Abbreviated: Wh = W hrs Example For example, let's say you have a 50-watt fan, and you leave it on for 3 hours one night. We can use this equation to create a simple calculator that converts watts to kWh: If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page. (Watthours is a measure of energy and watts is a . We're hiring! Watt-hours = watts * hours / efficiency = 1250 / 0.85 = 1470 watt-hours Since watts = amps * volts divide the watt hours by the voltage of the battery to get amp-hours of battery storage Amp-hours (at 12 volts) = watt-hours / 12 volts = 1470 / 12 = 122.5 amp-hours. For example, if you have 100 W for a duration of 2 hours, then the wattage is (100)* (2) = (200) Watts. To convert watt hours to watts, divide watt hours by hours. May 07, 2018, 3 Ways for Persons with Disabilities to earn an Income at Home. You do that by multiplying amps times volts (W = A V). If you Google the cell name with "amp hour rating" you'll find the right value. . The formula for calculating watt-hours is Watts x Hours = Wh. Terms of Use | So the 10s2p has 10 cells in series and then two of those in parallel for a total of 20 cells (10 x 2). spare batteries for your Ultra-Litemobilitychair, Top 10 Lightest Weight Electric Wheelchairs in the USA, Pros and Cons of Travelling With the Lightest Electric Wheelchair, The Rise of Lithium Battery-Powered Motorized Chairs, Making Sense of Airline Regulations regarding Lithium Batteries, How to calculate Battery Watt-Hour (WH) Rating. I previously thought of full face helmets to be clunky, The sub $500 price group used to be very competitive when Chinese companies like Meepo and Wowgo first came onto the scene. Estimate how many hours per day you use the appliance. An ebike battery is measured by its voltage (V) and amp-hour (Ah) rating. Just input the quantity against the appliances you use to calculate the watt consumption per hour by your appliances. 400 Wh is equal to 400 Joules in one hour. The number of cells in series/parallel is captured in a format like this: 10s2p or 2p10s. Calculator: Amp Hours to Watt Hours Calculator. Let's say you use an electricity usage monitor to track the power consumption of your TV when it's turned on. According to the label, the blender uses 12 amps (A). Voltage is denominated in Volts (V), while capacity is denoted in Ampere-Hours (AH). Anywhere between 5% and 10%. Putting batteries in series increases the voltage while more in parallel increases the amount of power you can pull from the battery (amps). Anywhere between 1% and 3%. Formula: kilowatt hours = watts 1000 hours, Calculator: Watts to Kilowatt Hours Calculator. The average daily use for a US household is around 900 watts or 90kWh. A Watt Hour (Wh) is equal to the amount of energy it takes over an hour to produce one kilowatt-hour (kWh). . 10s2p is the same as 2p10s, just different ways of writing it. One watt equals one joule per second, and one Wh = the amount of time it takes to produce an electrical current equivalent to 1000 watts. If your lithium battery does not include a watt hour (Wh) rating on the casing you can calculate it by using the voltage and mAh or Ah capacity. Thus I estimate its daily energy usage to be 120 watt hours. There are 3600 seconds in an hour, so you would need to divide the watts by 60. You can now calculate as - 4.4Ah x 11.1 volts = 48.8Wh example 2: a 12 volt 50 Ah battery - 50 Ah x 12 volts = 600Wh If you need it our Lithium battery watt hour calculator will work out your results for you. So, youve seen the term Watt Hour pop up a lot lately. (Just like how 1 meter is 1000 millimeters.) In this blog post, we will talk about what a Watt hour is, and how to calculate them. The fan's daily watt-hours equal (250 watts) x (5 hours / day) = 1250 watt-hours per day. Here's how to calculate its watt hours: So, in this example, your car battery has a capacity of 600 watt hours. To convert kWh to Wh, you multiply kWh times 1000. Auto Cost Calculator . To do this, you have to divide watt-hours by voltage (12V for batteries). Battery Amp-Hour Calculator. How Much Solar Power Do I Need for My RV? As a point of reference, the average refrigerator uses 500 kWh per year or 50kWh per month and 5000 kWh would be equal to five hundred thousand watt-hours. So I did the following: 0.08 kWh 1000 = 80 Wh. If that same lightbulb runs for 2 hours, it uses 20 watt hours (20 Wh) of electricity. Its also worth noting that power usage for household items such as TVs and microwaves vary significantly from things like laptops or cell phones which typically use less than 50 watts. Next we need to figure out the amp-hours (Ah) for our pack. Heres how to calculate how many kilowatt hours it consumes in a day: So, in this example, your fridge consumes 12 kWh of electricity per day. AC single phase amps to kilowatts calculation. One Watt Hour equals one watt of average power flow over an hour. Ross Spark is a passionate advocate for the future of sustainable energy. The formula for calculating watt-hours is Watts x Hours = Wh. To estimate my kettle's energy usage, I'd do the following calculation: 1200 W 0.1 hrs = 120 Wh. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. Get the latest solar news from The Solar Advantage about solar tax credits, solar tax incentives, solar DIY, off-grid solar, free home solar designs and more. That looks like Ah = Wh/V. In the above example, the battery is 10.8V, while the capacity is 2,500 mAH. First, you need to convert the number of watts into kW. So I'd do the following calculation: 12 A 120 V = 1440 W. Turns out it uses 1440 watts. And here are the specifications for a blender I own. See how much electricity the appliance used. FANS AND COOLERS TABLE FAN - 50 W CEILING FAN - 75 W ROOM COOLER - 250 W TOTAL FANS AND COOLERS 2. For information on how this calculator works see How to calculate the Watt Hours (Wh) of a lithium battery. Estimate watt hours from appliance specifications, Get actual watt hours with an electricity usage monitor. With his expertise in green energy, he has been able to help people save money and live more sustainably through solar power. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. Make sure the appliance's max current in amps is less than the monitor's current limit. If youre considering solar power as a way to generate clean, renewable energy for your home, its important that you understand the basics of how much electricity will be generated by the panels and what size of system is needed. LAPTOPS AND COMPUTERS LAPTOP - 100 W DESKTOP - 200 W LASER PRINTER SMALL - 200 W As a point of reference, the average refrigerator uses 500 kWh per year or 50kWh per month and 5000 kWh would be equal to five hundred thousand watt-hours. Manage SettingsContinue with Recommended Cookies. In the above example, the battery is 10.8V, while the capacity is 2,500 mAH. To calculate its daily energy usage in watt hours, you multiply 100 watts times 4 hours: 100 W 4 hrs = 400 Wh In this scenario, your fan consumes 400 watt hours per day. DC amps to kilowatts calculation. To convert watts to kilowatt hours (W to kWh), first convert watts to kilowatts by dividing watts by 1000. Let's get started! Watt hours (Wh) = Milliamp hours (mAh) Volts (V) 1000. Top 5 Best Solar Deck Lights: Review & Comparison. 1 kilowatt hour is equal to 1000 watt hours, like how 1 kilometer is equal to 1000 meters. Note: If the capacity of your battery is expressed in milliampere hours (mAh)like in the image above you will need to divide by 1,000 to calculate the ampere-hours (Ah) before multiplying. Example: 100W 8h = 800 Wh. Watts to Heat Calculator . This answer assumes an average electricity cost of 10.42 cents per kWh. Boosted Stealth, Wowgo AT2, Ownboard M1, Wowgo 2s, LingYi belt driven longboard. Esk8 batteries are almost always comprised of smaller cells (usually 18650 or 21700) in different configurations. The number will be listed in watts (W) or amps (A). Here's how to calculate its total energy consumption in watt hours: 50 W 3 hrs = 150 Wh A watt hour (Wh) is a unit of energy equal to 1 watt (W) of power sustained for 1 hour. For example: 100 Watts running over four hours would equate to 400 Watt Hours or Joules in one hour. example 1: an 11.1 volt 4,400 mAh battery - first divide the mAh rating by 1,000 to get the Ah rating - 4,400/1,000 - 4.4ah. Step 1: Find the lightbulb's kilowattage. Hi, I'm Alex. Generating an income is usually difficult for people with disabilities. When calculating . Newer Post , 3 Ways for Persons with Disabilities to earn an Income at Home 3.9 3.9 . You can also check the battery amps hours chart for 12V and 24V batteries here. It runs for 4 hours per day. IntroductionSo, I finally get introduced to the wonders of downhill longboard full faces after the TSG Pass caught my interest. Multiply these two numbers to get the watt-hour rating (Ah V = Wh). Calculating voltage first, we take 3.6v (standard cell voltage for fast discharge) and multiply that by the number of cells in series. If not, go through this example: A 4400 mAh battery with ll.1volt means divide the rating mAh by 1000. Example: Calculating Your Electricity Costs. Annual power usage in Wh = 1700W x 1 Hours x 365 days= 620500 Wh / year. Enter the power in watts, consumption time period in hours and press the Calculate button: kWh to watts calculator Watts to kWh calculation The energy E in kilowatt-hours (kWh) is equal to the power P in watts (W), times the time period t in hours (hr) divided by 1000: E(kWh) = P(W) t(hr) / 1000 Watts to kWh calculation See also 6 min 60 = 0.1 hrs. This article will answer that question and more! To convert watts to watt hours, multiply watts times hours. It's easy to do! Example: 800Wh / 12V = 66.67 Ah. Embed. Need to convert the other way? Using an electricity usage monitor has the benefit of being exact. Based on the 754 watt figure, BTUs/hr = (754 watts * 3600) / 1054 = 2577 BTUs per hour, per server. Best Solar Shed Light: Which Solar Lights To Use for Your Shed? You may have been wondering what it is and how to calculate them? If your appliance lists its energy usage in amps, convert amps to watts. Esk8 batteries are almost always comprised of smaller cells (usually 18650 or 21700) in different configurations. The power P in kilowatts (kW) is equal to the power factor PF times the phase current I in amps (A), times the RMS voltage V in volts (V) divided by 1000: But this formula is a bit complicated, and there is an easier way to work out the Ah of your battery. Privacy Policy | Here is the formula Learn the Truth | 2022, How Many Solar Panels Do I Need? See the examples below for calculating and make use of the calculator that we've included at the top of the post. 60 watts / 1000 = .06 kilowatts. According to the label, it uses 1200 watts (W). But what exactly is WH, and where do you get this information? This means that the average family of four will consume 36,000 watt hours per month which equals about 360 kWhs if they have an energy efficient fridge and dishwasher like our Yeti 1250 and Sherpa 50 models respectively. One evening you watch 2 hours of TV, and afterward the monitor shows a total of 196 watt hours consumed. The energy E(Wh) in watt-hours is equal to the electric charge Q(mAh) in milliamp-hours times the voltage V(V) in volts (V) divided by 1000: E(Wh) = Q(mAh) V(V) / 1000 So watt-hours is equal to milliamp-hours times volts divided by 1000: watt-hours = milliamp-hours volts / 1000 or Wh = mAh V / 1000 Wh to mAh calculator See also Subscribe to our newsletter to get health tips and special offers. Learn How To Calculate Watt Hours. For example, here are the specifications for an electric kettle I own. Luckily we can calculate this ourselves! All Rights Reserved. For example, the Bluetti AC200 max has 2,048Wh, and a voltage of 51.2 V. July 21, 2022, The Rise of Lithium Battery-Powered Motorized Chairs A Watt Hour (Wh) is a unit of measurement for power over time (an hour). For example, if you have 100 watts running over four hours that equals 400 Wh or 400 Joules in one hour. Hence, the final version of the battery capacity formula looks like this: E = V Q, where: E - Energy stored in a battery, expressed in watt-hours; V - Voltage of the battery; and Q - Battery capacity, measured in amp-hours. Easy to use . Buy anattendant-controlledmobilitychair, Buyspare batteries for your Ultra-Litemobilitychair, Older Post If 100 watt light bulb is on for four hours that equals 400 Wh or 400 Watts over time. For my kettle, I only use it once a day in the morning, so I decided to check it once I was done making my morning coffee. Calculate watt hours by multiplying watts times hours (Wh = W hrs). My kettle actually uses around 80 watt hours per day. The important info about the configuration is how many cells are in series and how many in parallel. After using my kettle, my monitor recorded 0.08 kWh. The Amp hour rating can be useful to know when purchasing new batteries that are rated on Amp hours. Five hundred thousand watt-hours would be equal to 50,000 kWh or fifty times the amount of electricity usage for a typical refrigerator over an entire year. Since 1 AH is equal to 1,000 mAH (milli-Ampere-Hours), the capacity is 2.5AH. Sometimes, the WH rating is stated quite clearly, like in the picture above. For my electric kettle, it already lists its power consumption in watts, so I don't need to do any conversions. One Watt hour equals one watt of average power flow over an hour. Get $10 your next order when you subscribe! Generally, Lithium-ion battery has the Watt-hour rating mentioned on the battery itself. 1. So, if you have 100 watts running over four hours that equals 400 WHs (100400). June 13, 2018, Making Sense of Airline Regulations regarding Lithium Batteries Follow the instructions in the product manual. Voltage is denominated in Volts (V), while capacity is denoted in Ampere-Hours (AH). Watt itself is defined as Ampere X Voltage. The Amp hour rating can be useful to know when purchasing new batteries that are rated on Amp hours. 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