How Much Paint Will I Need To Paint My House?

Master Painters of London Ontario
Master Painters of London Ontario

To determine how much paint you’ll need for your project, you’ll need to calculate the total square footage or square meters of wall that you plan to paint and then consider the type of surface you’re painting and the type of paint you’re using. Here’s a step-by-step guide that Master Painters of London Ontario uses to predict amounts.

  1. Measure the Surface Area:

* Measure the length and height of each wall or surface you plan to paint in feet or meters.

* Multiply the length by the height for each surface to find the square footage or square meters.

* If you’re painting multiple surfaces, add up all the individual surface areas to get the total square footage or square meters to be painted.

  1. Determine the Paint Coverage:

* Check the label on the paint can or the manufacturer’s specifications to find the coverage rate. It’s usually listed as square feet or square meters per gallon or liter.

* For example, if a can of paint covers 350 square feet (32.5 square meters) per gallon, you’ll know how much area one gallon of paint can cover.

  1. Calculate the Amount of Paint Needed:

* Divide the total square footage or square meters by the paint coverage rate to determine how many gallons or liters of paint you’ll need.

* Round up to the nearest whole number since having a bit extra is better than not enough.

* Amount of Paint Needed = Total Square Footage / Coverage Rate per Liter

  1. Consider Additional Coats:

* If you plan to apply multiple coats (e.g., primer, base coat, and topcoat), multiply the amount of paint needed for one coat by the number of coats you intend to apply.

– Account for Surface Type and Conditions:

* Certain surfaces may require more paint due to their texture or condition. For example, rough or porous surfaces may soak up more paint.

*If you’re painting over a significantly different color, you may need extra paint to ensure good coverage.

– Buy Extra for Touch-Ups:

* It’s a good idea to purchase a little extra paint (usually 10% more) for touch-ups and future maintenance.

Remember that paint coverage rates can vary depending on the type and brand of paint and the application method (brush, roller, or spray). Always refer to the specific product’s label for the most accurate coverage information.

If you provide the square footage or square meters of the area you plan to paint and the coverage rate of the paint you intend to use, I can help you calculate the exact amount of paint you’ll need.

Discover the expertise of Master Painters of London Ontario. We specialize in interiorexterior, and spray painting services. Visit us at to learn more.