Calculating How Much Paint to Paint My House Exterior


Figuring out how much paint to paint my house exterior can be a daunting task.


The process involves more than just picking your favorite color from the swatch book at the local hardware store.


Factoring in the surface area, type of paint, and weather conditions can be a complicated job when calculating how much paint is needed for painting an exterior. It’s not an easy equation!


Understanding how much paint you’ll need for your house exterior is crucial in avoiding unnecessary costs and multiple trips back to the store.


Table of Contents:

Preparing Your Home’s Exterior

A successful exterior painting project begins with properly preparing your home’s surface. This involves a comprehensive cleaning process, repairing any existing damage, and priming the surfaces to ensure optimal paint adhesion.

Cleaning: The First Step in Preparation

Dirt and grime can hinder the effectiveness of paint adherence, leading to an uneven finish or early peeling off. Hence, it is essential that you give your home a thorough scrubbing before applying any paint to guarantee an even finish and prevent premature peeling. A power washer could be handy as it eliminates dirt from all corners of your house.


Mold or mildew on walls are common issues encountered during cleaning, which need immediate attention. Treat these areas with a bleach solution before proceeding further because ignoring such problems may lead to structural damage over time.

The Importance of Repair Work Before Painting

Prioritize inspecting every nook and corner for signs like cracks or holes in siding or trim that require repair before commencing painting tasks. If overlooked, these imperfections will appear even after several coats have been applied, thus affecting the final appearance negatively. It might seem tempting to handle minor repairs yourself, but remember a professional touch always yields better results, especially when dealing with large-scale damages.

Priming Surfaces Ensures Better Adherence

  • An essential step in preparing the wall surface is a primer application, which seals porous materials and provides an excellent bond between the topcoat paint.
  • This also enhances light color depth, ensuring higher coverage using saturated colors. A helpful tip is to use Behr paints as they guide selecting suitable paints based on different exteriors, including wood and masonry.
  • Besides, their handy calculator helps estimate how much paint is required depending on the texture and size.


Remember, success lies in the details. Prepare your house for the new, vibrant look it deserves by taking all the necessary steps.

Key Takeaway: 


Before painting your home’s exterior, ensure a thorough clean-up to remove dirt and grime for optimal paint adherence. Treat mold or mildew, repair damages, and prime surfaces for better bonding with the topcoat. Remember – meticulous preparation paves the way for a flawless finish.

Calculating How Much Paint to Paint My House Exterior

From surface area estimation to choosing quality paints, we’ve got you covered.

Estimating the Surface Area of Your Home

Determining how much paint you’ll need for your exterior painting project starts with estimating the total surface area to be painted. This process involves measuring each wall and calculating its square footage.

Taking Measurements of Your Walls

The initial step in assessing your home’s paintable surface area is taking measurements of every exterior wall you plan on painting. For a typical rectangular house, this would involve multiplying the length by the width for all four sides.


If your residence has unique features such as bay windows or dormers, these will require separate calculations. Don’t forget soffits, eaves, and other architectural details that could increase the overall surface area requiring coverage from those handy paint cans at home.

Including Doors and Windows in Calculations

Areas like doors and windows that won’t be painted should also factor into your calculation when determining overall surface area. Subtract their combined square footage from your original measurement this gives an accurate estimate regarding the exact coverage amount required using the available paint cans at hand.


A standard window typically covers around 15 square feet while an average door spans approximately 20 square feet; however, sizes can vary significantly based on design style or construction era.

Evaluating Paint Coverage Requirements

Your next consideration influencing the number of gallons needed concerns the rate – essentially how far one gallon can stretch given the type of paint. Behr paints, usually high-quality, often boast higher coverage rates than cheaper alternatives due to their rich acrylic resin content, allowing them to provide an excellent, rich coat even on highly textured surfaces.


Coverage rates fluctuate widely depending on factors such as whether it’s a light-saturated color applied onto a smooth versus rough texture, etc., but generally speaking, most brands claim they cover between 250-400 sq. ft per gallon under ideal conditions (i.e., non-porous/smooth substrates).

Key Takeaway: 


Calculating the right amount of paint for your house exterior involves estimating the total surface area, factoring in unique architectural features and non-paintable areas like doors and windows. The type of paint you choose also impacts coverage, with high-quality paints often providing better results.

Calculating How Much Paint to Paint My House Exterior

From surface area estimation to choosing quality paints, we’ve got you covered.

Calculating Paint Coverage

The coverage rate of the chosen paint primarily influences the quantity of exterior paint you’ll require for your project. Typically, a gallon of high-quality paint can cover between 250 to 400 square feet with one coat.

Determining Your Paint’s Coverage Rate

Manufacturers usually provide an estimated coverage rate on product labels or online descriptions. For instance, paints rich in acrylic resins and known for being typically high quality often state that a single gallon will generally cover anywhere from 250-400 square feet per coat depending on surface texture and porosity.


If you’re opting for a saturated paint color or painting over a highly textured surface area, anticipate lower coverage rates. A helpful tip is that darker hues need more coats than lighter ones due to variations in pigment concentration.

Finding Your Surface Area

To accurately calculate how much exterior paint you’ll need, first ascertain your home’s total external wall surface area. This involves measuring all walls’ lengths and heights and adding them together for an overall figure.


You should also consider any doors and windows as these areas won’t require painting – subtract these from your final calculation accordingly. If this seems complex or time-consuming, there are many handy tools available online that act as virtual ‘paint calculators’ simplifying this process significantly.

Factoring In the Number Of Coats Needed

Your choice of depth regarding the selected light or dark shade dramatically impacts how many coats will be required; thus affecting the exact amount needed when buying cans home depot style. Lighter colors usually offer higher coverage per gallon than deeper shades requiring multiple layers to achieve desired opacity.


A light-colored wall getting painted dark may necessitate two (or even three) applications while repainting similar tones might only demand one nice rich coat each scenario drastically changes volume requirements so keep this factor front-of-mind when calculating necessary.

Key Takeaway: 


When painting your house exterior, consider factors like paint coverage rate, surface area, and the number of coats needed. Remember darker hues might require more paint due to higher pigment concentration. Use online tools for easy calculations.

Choosing a Quality Paint

The selection of paint for your exterior painting project goes beyond just picking the right color. It’s about understanding the composition and quality of the paint you’ll be using.

Durability Matters

When choosing exterior paint, durability is key. Your home faces various weather conditions throughout the year which can impact its appearance over time. Therefore, it’s essential to select high-quality paints that can withstand these elements.


Paints with acrylic resins are known for their superior durability and resistance to fading and cracking, making them ideal choices for outdoor use.

Picking The Right Color

Your choice of color plays a significant role in determining how much paint you’ll need because coverage varies between light and saturated colors. Lighter shades often require fewer coats than more vibrant or darker ones due to their higher coverage area potential. So if you’re leaning towards a bolder shade, remember that additional cans may be required compared to lighter hues.

Coverage Rate & Cost-effectiveness

To ensure each gallon covers as much wall surface as possible, consider checking out estimated coverage rates on different types of surfaces. Smooth surfaces usually get around 350-400 square feet per gallon, while rough or highly textured surfaces might only cover around 200-300 square feet per gallon.


  • If applying the first-time painter’s technique without prior experience, opt for self-priming paints. They provide a nice rich coat even without primer, thus saving effort.
  • In terms of cost-effectiveness, premium paints might seem expensive at first glance, but their superior coverage rate means fewer layers are needed, proving economical over time.


Remember: investing in good quality exterior paints pays off by offering long-lasting protection against harsh environmental factors, thereby preserving aesthetic appeal while enhancing overall value.

Key Takeaway: 


When painting your home’s exterior, don’t just focus on color. Consider paint quality and durability against weather conditions, with acrylic resins being a top choice. Remember, bold colors may require more coats and thus more paint. Check coverage rates for cost-effectiveness – premium paints might be pricier but cover better in fewer layers.

Purchasing Supplies and Equipment

Once you’ve established the necessary materials, you must acquire the right tools for a successful painting project. A successful painting project relies not only on high-quality paint but also on appropriate application equipment.

The Importance of Brushes and Rollers

Synthetic bristle brushes are ideal when using latex-based paints such as Behr Paints, renowned for their acrylic resins that provide durability against weather conditions. These brushes allow precision work around windows, doors, or other detailed areas.


In contrast to brushes, which cover smaller areas at a time, rollers can quickly cover larger wall surfaces with ease. Different nap sizes cater to various types of walls – shorter naps are best suited for smooth surfaces while longer ones handle highly textured surfaces better.

Selecting Drop Cloths

To protect your surroundings from accidental spills during painting sessions, use drop cloths. Canvas variants offer traction even when wet, unlike plastic sheets which might be cost-effective but pose slipping hazards if splattered with wet paint.


If reaching higher-coverage areas is necessary due to building height, scaffolding ladders will come in handy. Ensure they meet safety standards before making a purchase stability should always be a priority over price, especially when dealing with elevated levels.

Essential Tools: Tape & Caulk

Avoid unwanted streaks of light or saturated color by masking off non-paintable zones like window frames and door edges. Painter’s tape is another essential tool to consider. Additionally, caulk seals gaps between siding boards, ensuring a nice, rich coat upon application. First-time painters typically find this particularly useful in creating a seamless finish.


Lastly, remember that quality matters regarding the supplies used and the service providers hired to tackle large-scale projects involving entire rooms. For example, New Age Painting Coatings offers comprehensive services tailored according to client needs, thus saving valuable resources all in the same go.

Key Takeaway: 


Painting your house exterior isn’t just about the paint – it’s also about using the right tools. Synthetic brushes are great for precision, rollers cover large areas quickly, and drop cloths protect against spills. Don’t forget essentials like tape and caulk for a seamless finish.

Hiring Professional Painters: A Smart Choice

For those who are not confident in taking on such a large project, professional painters with experience in both residential and commercial interior and exterior painting services can provide an alternative solution. If you’re not comfortable taking on such an extensive project yourself, consider hiring professional painters who have experience in both residential and commercial interior and exterior painting services.

The Value of Hiring Professionals

When it comes to calculating how much paint will cover 100 square feet or more, professionals excel. They possess the necessary instruments and apparatus to do a great deal of work quickly.


This efficiency is especially beneficial for first-time painters applying a saturated paint color, as this requires careful attention.

Finding Reputable Painting Companies

Selecting a reputable company like New Age Painting & Coatings involves several factors, including examining their portfolio of previous work – providing insights into what kind of results to expect from them – checking out customer reviews online, and asking for references from past clients.


A reliable company won’t hesitate to provide these details upon request, thus helping ensure you get a nice, rich coat that lasts for years.

Budget Considerations When Engaging Professionals

The cost associated with hiring professionals varies depending on the size of your home (paintable surface area), the type and amount of paint used (acrylic resins vs oil-based paints), and whether any repairs need to be done before the painting begins, among other things. These factors can certainly impact the final price tag attached to the service provided by those experts hired to do the job correctly.

Determining Exact Coverage Amounts

  • An exact coverage amount isn’t always easy to determine due to variations in wall texture. Highly textured surfaces may require more paint than smooth ones, so keep this in mind when budgeting for your project.

Key Takeaway: 


Don’t brush off the idea of hiring professional painters. They offer expertise in estimating paint quantities, applying saturated colors efficiently, and handling textured surfaces. Remember to check their reputation and consider factors like home size, paint type, and pre-painting repairs that can affect costs.

FAQs in Relation to How Much Paint to Paint My House Exterior

How much paint is needed to paint the house exterior?

The amount of paint required varies based on the size and condition of your home’s exterior. Generally, a gallon covers about 350-400 square feet with one coat.

How much interior paint do I need for a 2000 square foot house exterior?

To cover a 2000 sq ft house exterior, you’ll typically need around 5-6 gallons for one coat, assuming average coverage rates. Double that if planning two coats.

How much paint do I need for a 1500 square foot house exterior?

Around four to five gallons should suffice for one coat on a 1500 sq ft house. Consider more if applying multiple coats or dealing with porous surfaces.

How many gallons of paint do I need for a 1000 square foot exterior?

You would generally require between three to four gallons of quality outdoor-grade paint to adequately cover an area of this size in a single coating.


Exterior painting is a significant project, but with the right knowledge and preparation, it’s entirely manageable.


You’ve learned how to calculate the amount of paint needed by estimating your home’s surface area and understanding paint coverage rates.


We’ve also explored the importance of choosing quality paints and comprehending sheen levels for an ideal finish.


The process doesn’t stop at buying paint; you need additional supplies like brushes, rollers, and drop cloths – all part of thorough planning.


If this sounds overwhelming or if you’d instead leave it to professionals – we’re here for you!


New Age Painting & Coatings, based in Las Vegas, offers residential and commercial interior and exterior painting services. We are experts in determining how much paint will be required for your house exterior. Trust us with your next painting project!

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