How Much Romex To Wire A House?

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Are you a DIYer looking for an answer to the question: “How much Romex do I need to wire my house?”

If so, you’ve come to the right place!

In this blog post, we’ll go over the basics of wiring a house and how much Romex you’ll need for your project. 

In this blog, we’ll explore the basics of electrical wiring for the home.

These topics will help you understand the basics of electrical wiring.

And it will also give you the information needed to make an informed decision about your home’s wiring needs.

The rule of thumb is 1 foot of wire per 1 square foot of house.

However, this may vary depending on the layout of the house and the type of Romex wiring being used.

Read on for more information!  

What is Romex?

Romex is a type of electrical wiring commonly used in homes and buildings.

It is a combination of two or more insulated wires encased in a protective, non-metallic sheath.

Romex wiring is commonly used for interior lighting circuits, outlet circuits, and other general wiring applications.

It is preferred over other types of wiring because it is easier to install and provides better protection against electrical hazards.

Romex wire comes in various sizes and gauges and is rated for different amp capacities depending on the application.

When it comes to wiring a house, Romex is the most popular choice.

The reason behind this is its ease of installation, durability and cost effectiveness.

How Much Romex Do You Need For A House?

How Much Romex To Wire A House?
How Much Romex To Wire A House?

The amount of Romex wire needed to fully wire a house depends on a variety of factors.

Those are the size of the home, its location, and the number of circuits that are required. 

The average house size is 2500 sqft, so generally speaking, 2000ft of 14-2 Romex and 1000ft of 12-2 Romex should be enough. 

However, it’s important to keep in mind factors such as air conditioning and additional outlets when calculating the amount needed. 

Additionally, it’s important to use the correct type of Romex wiring for your particular application to ensure safety and efficiency.

It’s generally recommended to use 12-2 on lights rather than 14-2 as it’s more cost efficient. 

The average cost to install Romex wiring in a home is approximately $1.50-$2.00 per linear foot. And this takes into account the cost of the Romex wire itself. 

It’s difficult to estimate exactly how much wire is needed without seeing the layout of the house. But this should give you a general idea.

Factors Affecting The Amount Of Romex Needed?

The amount of Romex needed to wire a house can vary widely depending on numerous factors. 

The size of the home, its location, and the number of electrical circuits in the home all play a role in determining how much Romex wire is necessary for the job. 

The thickness of the Romex wire must also be taken into account, with thicker 12 gauge Romex being used for circuits with a 20Amp breaker, while 14 gauge is used for 15Amp circuits. 

Additionally, the length of cable runs and the number of devices to be wired must also be taken into consideration when calculating how much Romex is needed. 

Knowing these factors can help you accurately calculate how much Romex you need to effectively and safely wire your home.

What Size Romex Do You Need?

How Much Romex To Wire A House?
How Much Romex To Wire A House?

When deciding what size Romex to use for wiring a house, it is important to consider the type of circuit and the amount of current needed. 

Most 120Vac household circuits are fine using a 12 or 14 gauge wire, although some circuits may require a thicker wire. 

The smaller the gauge number, the larger the conductor size. 

The amperage rating of each circuit must be taken into account in order to determine the size of Romex needed for each circuit. 

For example, a bedroom outlet typically requires a 15-amp breaker and 12-gauge Romex

In contrast, a kitchen outlet typically requires 20-amp breakers and 10-gauge Romex. 

It is important to use the correct size Romex as not doing so can result in an overload and cause a fire hazard.

Common Wire Types And Rated Amperage For Wiring A House

When wiring a house, there are many types of wire to choose from. 

The most common sizes and their amperage (amp) ratings are: 14-gauge (15-amp), 12-gauge (20-amp), 10-gauge (30-amp), and 8-gauge (40-amp). 

Romex 12 gauge wire is rated for 20 Amps and is the most commonly used type of wire for residential wiring. 

Wires come in different sizes/gauges to work with the amperage of the circuit in which they’re used. 

It’s counterintuitive, but the larger the gauge number, the smaller the wire size. 

To ensure that your wiring is safe and up to code, you should always take into consideration both the size and the amperage rating of the wires you use.

How To Calculate How Much Romex You Need?

How Much Romex To Wire A House?
How Much Romex To Wire A House?

Calculating how much Romex you need to wire a house depends on the size of the house, the number of circuits, and the type of Romex wire you choose. 

To calculate the amount of Romex you need, measure the length of each circuit in the house and multiply that by the number of circuits. Then, multiply that number by the length of Romex needed to complete each circuit. 

For example, if a circuit is 30 feet long and you need 10 circuits, you would multiply 30 x 10 = 300 linear feet. 

Finally, add up all of these linear feet to determine how much Romex wiring you need for your house

Keep in mind that it’s important to choose an appropriate size for your wire based on the amperage rating and number of conductors. 

This will ensure that your wiring is safe and up to code.

Common Applications For Romex Wiring

How Much Romex To Wire A House?
How Much Romex To Wire A House?

Romex is a popular choice for wiring a house due to its affordability and reliability. 

It is commonly used in residential applications such as walls, ceilings, and floors. Romex is also used to wire outlets, lights, fans, and switches. 

It is also frequently used in garages and other outdoor structures to provide power for tools or other electrical appliances. 

Romex is ideal for wiring a home because it is easy to install. It requires minimal maintenance and can be used to install a wide range of electrical systems. 

The versatility of Romex makes it a great choice for any home wiring project.

Average Cost Of Installing Romex For A House?

Installing Romex wiring in a house can be a costly endeavor. 

The average cost to install Romex wiring in a home is $1.50 to $2.00 per linear foot, including the cost of the Romex wire. 

Electrical wiring installation costs an additional $2 to $4 per square foot on average, and the wiring alone costs $6 to $8 per linear foot. 

In addition, structured wiring and heavy-duty circuits can cost an average of $2.50 to $3.50 per linear foot. 

All in all, the quick answer to how much Romex is needed to wire a house is “more than you think”. 

To ensure that your house is properly wired and that you stay within your budget.

It is important to understand the factors affecting the amount of Romex needed.

Determine the size of Romex you need, understand common wire types and rated amperage for wiring a house, calculate how much Romex you need, and consider common applications for Romex wiring.

Common Mistakes To Avoid When Wiring A House?

When it comes to wiring a house, it is important to be aware of common mistakes to avoid. 

These include using wires that are too short, wiring outside of electrical boxes, using unprotected electrical cables, and using the wrong size Romex. 

Wires that are cut too short make wire connections difficult, as well as more likely to result in poor connections. 

To ensure safety and proper functionality, it is important to always wire inside an electrical junction box. 

Additionally, electrical cables in an occupied area should be protected with the right type and size of wiring. 

Lastly, the right size Romex should be selected; this will depend on the amount of current needed for the application. 

By avoiding these common mistakes when wiring a house, you can ensure a safe and successful installation.

Safety Tips for Installing Romex Wiring

When wiring a home, safety should be the top priority. 

Romex wiring is considered safe to use, however there are some safety tips to keep in mind when installing it. 

The sheathing on Romex is made of tough polyvinyl chloride (PVC) thermoplastic, and is 19 mils thick. 

It is important to adhere to the National Electrical Codes when installing Romex in your home.

This includes using the correct size of Romex for the application and using the appropriate number of conductors (wires) for the particular application. 

Staple Romex cable in the attic at intervals of 4 ½’ or less. 

Additionally, for larger applications, such as a half-inch conduit, use no more than nine 12-gauge wires. 

Lastly, make sure to never exceed the rated amperage for the particular type of wire you are using. 

Following these safety tips can help ensure your home’s wiring system is safe and secure.


In conclusion, Romex wiring is an important part of any home wiring project. 

It is important to have the right amount of Romex for any wiring job in order to ensure safety and proper functioning of the electrical system. 

When calculating how much Romex you need for a house, it is important to consider factors such as the size of the house, the type and number of devices being wired, and the wire type and amperage used. 

Additionally, it is important to use the correct size Romex for each application and to take safety precautions when installing Romex wiring. 

The average cost for installing Romex in a home is between $1.50 – $2.00 per linear foot, but this can vary depending on a number of factors. 

With the right knowledge and materials, you can safely wire your home with Romex.

Best Wishes!

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About Charlie D Paige

Charlie is a massive DIY fan, with dozens of DIY projects under his belt - ranging from tiling to electrics, and concrete pads to walls. Charlie loves tinkering, seeing how things works, the outdoors and playing with power tools... so is it any wonder that he's completed so many DIY jobs over the years?

Charlie loves spreading his hard-won DIY experience with the world via this blog.