How Many Watts To Run a House? Home Appliance Wattage Worksheet

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Person holding a light bulb over their head wonders how many watts to run a house and how many watts does a refrigerator use, and is there an electricity calculator or home watts worksheet that can explain how many kwh does a house use?

Whether you are planning to use renewable energy (like installing solar panels on your home) or buying a backup generator, it is important to learn how many watts to run a house?

Fortunately, since most people have a monthly electricity bill, this isn’t as hard as it might seem.

Because with the right information, you can easily get a firm grasp on your home’s energy usage and know exactly how many watts to run a house of your size.

In fact, you can use this free downloadable sheet:

Household Wattage Calculation Sheet

Download a worksheet that allows you to fill out how many watts power your house.

This complete guide explains the common wattage of many appliances and shows you how to use a worksheet to monitor and measure the how many watts to run a house.

What Is a Watt?

A watt (W) is a unit of power that is used to measure electrical energy transfer rates over a second. A watt equals a Joule per second.1

This combination of an energy unit with a specific period of time makes it easy to understand the power consumption ratings of electrical devices.

Close up view of a single stator watthour meter that measure the total kilowatt-hours consumption of an establishment.

(Image: biker_becca22)

By using watts as a measure of power, you can learn how much electric energy your devices need to run. This helps you with understanding how much electricity your household consumes.

With it, you can also determine what wattage of backup systems will fulfill your needs the best. This means that if you are trying to learn how many solar panels to power a house, you will need to learn your household’s watt usage.

Electricity Calculator: Watts to Horsepower and Other Units

The Watt is one of the most popular SI units.2 It is used across the world to measure the power consumption and requirements of electric devices.

1 watt means 1 joule of work in a second. This means that if your device needs 100 watts to run, it requires 100 joules of work performed in a second.

Besides watts, the other units of power that you need to remember include the horsepower (HP), the kilowatt (kW), the megawatt (MW), and the kilowatt hour (kWh).

The following sections describe how the watt compares to these units in terms of energy measurements for both commercial and residential electricity.

How To Calculate Horsepower in Watts

Before you calculate horsepower in watts, you should learn what horsepower means in the first place. Similar to a watt, the horsepower is also a unit of power.

But the metric that it uses to define this power is wildly different from watts. Where 1 watt equals 1 joule per second, 1 HP is a bit more complicated and highlights that something can lift 550 lbs by one foot in one second.3

This makes it a more complex unit than watts. But it is quite helpful for you to learn when looking at the power rating of certain devices such as car engines and motors.

If you want to convert HP to watts, you can remember that 1 HP approximately equals 736 watts.

You can also use the following equation to convert HP to watts.

X HP x 736 = X Watts

You can also use the following equation to convert watts to HP.4

X Watts x 0.00134 = X HP

This means that when you are calculating how many watts to run a house, you usually don’t have to use HP measurements. But it will be crucial for you to learn about kilowatts and megawatts, where each single unit represents a much higher amount of watts for easier calculations.

How Much Is 1 HP to Watts?

1 horsepower equals approximately 736 watts.17 This means that if you have to convert 100 HP to watts, you can simply multiply 100 HP x 736 = 73.6 kW.

Conversely, you can also convert watts to horsepower by multiplying the available number of watts by 0.00134.

How Many Watts in a Kilowatt Are There?

There are 1,000 watts in a kilowatt. This means that if your clothes dryer requires 4,000 watts to operate, it runs on 4kW

Similar to a watt, the kilowatt is also an SI unit of energy. Since one kilowatt is a thousand times higher than one watt, it is often used to calculate and refer to the energy consumption of homes and offices.

A man operating a frontload washing machine with dryer.

(Image: RDNE Stock project23)

This makes it easier to note, describe, and convey the required energy consumption rate without generating confusingly large numbers in watts.

For example, if the collective devices for a single room in your home require 2,000W to run and the energy consumption for another room of your household is 4,000W, you can write these figures down as being 6kW in total. You can then use this information while shopping around for renewable energy solutions, installing a backup generator system for emergencies, or using an electricity calculator to determine your energy consumption.

On a similar note, if you want to calculate how much power your solar energy system can generate in your area,5 you will find those figures outlined in kW instead of watts as well. This holds true for finding a solar wind hybrid system.

This helps you with calculating how many watts to run a house: home appliance wattage worksheet usage as well.

How Many Watts in a Megawatt Are There?

There are 1 million watts in a megawatt.6 This makes the megawatt, an SI unit, an incredibly large unit for measuring electric power.

Due to this reason, megawatt is utilized in measuring and describing the power consumption requirements of large populations such as towns and cities. This is also why you might have seen MW being used as a power measurement unit when reading about local power plants.

With the emerging popularity of solar farms, which are large-scale projects to produce solar energy, it has also become common to see these farms describe their energy production in MW.

Keeping this in mind, during your calculation of the power consumption requirements of your home, you do not need to outline your data in MW by any means. You can simply get the power consumption needs of your devices in watts, and then add them up to kW.

This also helps you use electricity calculator solutions more easily.

With that being said, you will require some knowledge about kilowatt-hours while calculating how many watts to run a house on average.

What Are Kilowatt Hours?

A kilowatt hour is a unit measuring energy usage over the duration of an hour.7 This helps you determine how much energy a device consumes if you use it for a full hour.

While units such as watts, kilowatts, and megawatts refer to the energy used or produced by a device, kilowatt hour describes the amount of time that energy can be used. This is why, kWh is an integral part of energy usage calculations and also shows up in your electricity bill to outline your energy consumption.

Row of residential electricity meter that measures the total electrical consumption of a house.

(Image: Tim Mossholder24)

One kilowatt hour equals 1,000 watts or 1kW. This means that if you use a 100-watt light bulb for an hour, it consumes 0.1 kWh.

If you keep using the 100W light bulb for 10 hours, it will eventually consume 1 kWh. This also holds true for all electric devices and home appliances.

For instance, if you use an electric pressure cooker of 1000W or 1kW for 10 minutes, it will consume 0.1 kWh within those 10 minutes. But if you decide to use it for the full hour, it will end up consuming 1kW in that single hour.

This makes it important for you to learn about kilowatt hours before you calculate your residential electricity consumption.

In turn, when you use any type of device, regardless of the watts outlined on them, the amount of energy that they use is always described in kWh. With this information in mind, you can now easily learn how many watts to run a house home appliance wattage worksheet.

How Many Kilowatts To Run a House: Here’s How Many KWh Does a House Use on Average

Wondering how many kilowatts to run a house? The answer depends on a case-to-case basis.

This includes factors such as the size of your home and your family, as well as the number of electronic devices that you use on a regular basis. For example, if your 4-member household has three portable air conditioners, your energy consumption will be higher than a similar household with no air conditioners.

With that being said, the average U.S. household uses approximately 10,632 kWh per year.8 These statistics are based on data collected in 2021.

With that being said, you should remember that this average also varies from state to state. For example, if you live in Louisiana, you might be close to the average household energy consumption which stands at 14,302 kWh per year.

But if you reside in Hawaii, your household energy consumption might be closer to the average household and stand around 6,369 kWh per year.

You should pay attention to these differences because they help you gauge how much energy your specific household uses in a month and a year. This allows you to understand how many solar panels to power a house does it take in your case.

How Many KWh per Day Is Normal for a Home?

There is no “normal” when it comes to electricity usage. Some households utilize a low amount of electricity, while others require a higher amount of electric power to fulfill their needs.

As long as you use renewable energy sources to meet your requirements and follow best practices to control your consumption, you can ensure that the amount of energy that your home uses do not negatively affect the environment or your bank account.

How Many Watts To Run a House on Solar Power?

The average U.S. household requires approximately 900 kWh of electricity every month.8 But your energy needs may vary depending upon various factors.

Solar panel system installed on the roof of a house absorbing sunlight that provide clean energy.

(Image: Carlito200025)

You can first use an electricity calculator or look at your past electricity bills to determine your residential electricity consumption, and then reach out to a PV solar energy system provider for a personalized consultation.

What Is the Average KWh Usage for 2,000 Sq. Ft. Home?

The average kWh usage for a 2,000 sq. ft. home varies according to the household’s needs and location.

But you can still get a general idea of the average kWh usage for a 2,000 sq. ft. home.

It is because 2,000 sq. ft. is the U.S. median home size.15 Seeing that the energy consumption for the average household is approximately 900 kWh per month,8 you can safely assume that a 2,000 sq. ft. home may use around 10,000 kWh per year.

How Many Solar Panels Do I Need for 2,000 KWh Per Month?

The amount of solar panels that you need to generate 2,000 kWh per month depends upon different factors. These include but are not limited to the area that you live in, the weather conditions that you have, the amount of direct sunlight that you get on an average day, and the wattage of your installed solar panels.

On an average basis, you may require anywhere from 25-40 solar panels of 500 watts each in order to generate 2,000 kWh of electricity per month.14 But these figures can vary on a case-to-case basis.

It is crucial that you get a personalized estimate from a local solar energy system provider who can assess your installation site and associated conditions to provide you with a specific recommendation for your residential electricity needs.

What Is the Average KWh Usage for 3,000 Sq. Ft. Home?

The average kWh usage for a 3,000 sq. ft. home may fall around approximately 1,800 kWh.16 However, it is important to remember that residential electricity consumption varies across the United States and remains influenced by factors such as weather conditions.

That is why, you should do a check on your devices to determine how many watts to run a house do you need in your specific case.

How Many Watts Can an Outlet Handle?

It mainly depends upon the outlet’s amps and volts. If you have a 15-amp outlet of 120V, it may usually handle 1,800 watts.18

But this varies on a case-to-case basis. You should look at the amps and voltage of your outlet before you plug in multiple devices or a device of higher wattage.

How Many Watts To Run a House: Home Appliance Wattage Worksheet

No matter if you are trying to buy a photovoltaic (PV) solar energy system or just planning to get ahead on disaster management, you need to calculate your household’s energy consumption to properly fulfill your requirements from your new setup.

This enables you to understand the power consumption needs of the specific devices that you own, while also giving you a better idea of what type of solution will suit you the best.

A view inside the kitchen area of a house showing the electrical appliances that consume ample amount of electricity.

(Image: Curtis Adams26)

The following home appliance wattage worksheet helps you along the process and lets you determine how many watts to run a house. With easy instructions and straightforward execution, you can collect the required information from all of your devices and have it in one place within a few minutes.

How To Use the Home Appliance Wattage Worksheet

Below is a guide on how to use the Home Appliance Wattage Worksheet.

Household Wattage Calculation Sheet

Download a worksheet that allows you to fill out how many watts power your house.


For easy reference, you can simply write down in this column what type of device you own. If you want to be more specific for multiple devices such as TVs, you can label these as “living room TV” and “bedroom TV.”

Alternatively, you can also list different devices of the same wattage in the same row by listing their quantity such as “light bulbs x6” and multiplying their watts accordingly.

Rated Watts

This column refers to the watts at which your device runs. You can find this detail either on the device in a product label or within its instruction manual.

For proper calculation, make sure that you check and write down the rated watts exactly as they are on the device.

Additional Starting Watts

Certain devices with a motor such as a refrigerator, air conditioner, or sump pump require additional starting wattage to begin operating.9 Such devices require this higher amount of energy for 2-3 seconds before reverting to their running watts while you operate them.

These additional starting watts are typically twice the amount of the device’s running watts.

Hours Used/Day

This is where you can write the amount of time that you typically spend using the device. For instance, if you watch TV for approximately 4 hours a day but only turn on your toaster for about half an hour a day, you can note down these details in this row.

Average KWh/Day

This column helps you determine the amount of electricity you use through your device in a single day. For instance, if you use a 100W light bulb 3 hours a day, it will have a consumption of 0.3 kWh per day. But if you have a 2600W air conditioner that you use 5 hours a day, it will add 13kWh to your daily consumption.

Total Rated Watts

This is where you sum up the total rated watts of all of your listed devices. For easy calculations, you can also note them down in kW instead of W.

Highest Additional Starting Watts

This requires you to take a good look through the whole column of additional starting watts and select the highest single figure from it. For instance, if your air conditioner requires 2300W as starting watts and your sump pump needs 2400W as starting watts, your highest starting watts will be 2400W instead of a total of all additional starting watts for your devices.

Total KWh/Day

This is where you can note down the sum of your average kWh of all devices. This lets you determine how much energy you are using each day and could also help you learn how to become carbon neutral depending upon your energy usage.

Total Watts Required

This box is a sum of the total rated watts and the highest additional starting watts from your worksheet. This lets you determine how many watts to run a house do you need.

According to your convenience, you can either print this sheet to use it manually or download it to fill it out digitally.

This goes a long way towards helping you figure out how to meet your residential electricity needs.

How Many Watts Does a TV Use?

A TV’s energy consumption mainly varies due to its size.

For example, a 32-inch LED TV has its running watts typically listed as 60W; whereas, a 65-inch LED TV requires 130W to run.19

How Many Watts Does a Refrigerator Use?

How many watts does a normal refrigerator use? The answer is about 200 watts. However, the maximum power usage of a refrigerator typically fluctuates throughout the day.

Close up view inside the refrigerator that preserve foods using electricity.

(Image: Pexels27)

You may look at the label of your specific refrigerator model to see how many kWh it uses in a year according to the manufacturer.20

How Much Emissions Does 1 KWh Generate?

How much carbon dioxide equivalent (CO2e) or greenhouse gas emissions are generated through the usage of 1 kWh of electricity depends on a case to case basis.10

It is because CO2e emissions through the usage of electricity are associated with the type of energy that you use to power your electric appliances.

If your electric company uses fossil fuels to generate energy before supplying it to you in the form of electric power, your CO2e emissions from using 1 kWh of electricity will be quite significant.

In contrast, if you use renewable energy or a mix of fossil fuels and renewable energy sources to power your home, your CO2e emissions will be lower than where they could be with the exclusive use of energy derived from fossil fuel.

With that being said, using a CO2 emissions per kWh calculator can give you an idea of how much emissions you might be generating through your residential electricity usage.

These calculators let you choose what type of electricity you currently use, which helps you get more suitable calculations and obtain more accurate answers than what you can gain from reading generalized statistics.

Electricity Bill Calculator: How Much Does Your Energy Usage Cost You?

After learning how many watts to run a house, you might be wondering how much your energy usage costs you every month. Similar to the average U.S. household energy consumption,8 the answer depends on a case-to-case basis.

In this case, the factors that influence your energy costs may include but are not limited to:11

  • The amount of energy that you consume
  • The state and area that you live in
  • The electric company that you use
  • The type of energy that you utilize
  • The current prices of fuel
  • The kind of weather that you experience

Some of these factors such as the area that you live in and the weather that you endure might be out of your hands. But you can still control other aspects such as choosing an electric company with the lowest rates in your area.

In some cases, thoroughly checking your utility bills can also work wonders for reducing your electricity costs.12 For example, if you find any incorrect charges on your bill, you can take it up with your electric company and have those charges rectified.

How Do You Start Using Renewable Energy for Residential Electricity?

If you want to fulfill your residential electricity needs with renewable energy, you may have plenty of options at hand.

Some of the most popular options for adopting renewable energy include but are not limited to:

  • Getting your supply from an electric company that offers renewable energy
  • Installing renewable energy equipment such as solar panels
  • Investing in a community solar farm to get a supply of renewable energy

You can choose any of these options according to what suits you the best. But if you install your own renewable energy equipment, you can enjoy the benefit of getting a tax credit.13

Side view of a house with solar panel system installed on its roof actively absorbing the sunlight to produce clean energy.

(Image: Stefan Thiesen28)

As a result, after you use How Many Watts to Run a House: Home Appliance Wattage Worksheet from this guide, you can be confident in looking for renewable energy options that could help you make better choices for the good of the planet.

After Knowing How Many Watts To Run a House, You Can Be More Conscious About Your Energy Consumption

From reducing your electricity bill to helping you adopt renewable energy, learning about your energy consumption can help you in many ways.

By learning how many watts to run a house through a detailed worksheet, you can take the necessary actions to improve your life as well as the planet’s well being.

Frequently Asked Questions About How Many Watts To Run a House

How Many Watts Does a Microwave Use?

A microwave holds a high wattage that typically ranges around 1700W.19 This means that if you use your microwave for a total of 1 hour a day, it may hike your residential electricity consumption by a whopping 1.7 kWh.

What Size Generator Do I Need To Power My Home?

The size of the generator that you need to power your home depends upon your specific energy requirements. After using an electricity calculator, you can consult with a local generator provider to get personalized recommendations for your residential electricity needs.

How Much Is a Generator for a 2,000 Sq. Ft. House?

A 2,000 sq. ft. house may require a 17-20 kW generator. In 2023, such a generator may cost anywhere from $4,000-$6,000.21

How Many Solar Panels To Power a House?

How many solar panels to power a house that you need to power a house depends upon your home’s location, your power consumption needs, and the type of solar panels that you install. You should reach out to local PV solar energy system providers for a personalized consultation and subsequent recommendations for your residential electricity requirements.


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