How Much Area Does 1 Gallon of Paint Cover?

One US gallon is about 3.785 litres. At an approximate coverage of 37 square metres per gallon, it may cover about 37 m² with one coat, or around 18.5 m² with two coats. Actual coverage depends on the paint, surface and application; in Australia, check the tin's coverage in square metres per litre.

How Much Does One Gallon of Paint Cover?

As a rough guide, one gallon covers about 37 m² for a single coat. This is the painted surface area, not the floor area of a room. A room's walls have multiple surfaces, and doors and windows may reduce the area that needs painting.

For two coats, the same gallon may cover about 18.5 m² of surface. This is an estimate only: porous, rough or unpainted surfaces may absorb more paint, and colour changes can affect coverage.

Two gallons may cover about 74 m² for one coat, or about 37 m² for two coats. Check the coverage guidance for the specific paint rather than relying on a fixed room-size estimate.

Three gallons may cover about 111 m² for one coat, or about 55.5 m² for two coats, before adjusting for surface and paint type.

Four gallons may cover about 148 m² for one coat, or about 74 m² for two coats. Measure the walls and ceiling separately for a better estimate.

Maximize Your Paint: Tips to Make Every Gallon Go Further

To maximize your paint, start with the right tools. A high-quality roller will ensure proper coverage and deliver the best results. For smooth walls, use a 9-inch roller with a 3/8-inch nap. If you’re working with textured walls, opt for a roller with a 1/2-inch nap to achieve a flawless finish. This approach will help you make the most of every gallon of paint!

Consider Your Walls: Choosing the Right Paint for Different Surfaces

When planning your painting project, it's essential to consider the type and condition of your walls. Different surfaces may require specific paint formulations to achieve the best results. For smooth, dry walls, a standard latex paint works well, while textured or uneven surfaces may benefit from a more forgiving paint type. Additionally, if your walls have been previously painted, make sure to assess the existing color and finish to ensure proper adhesion and coverage. By taking your walls into account, you'll enhance the longevity and appearance of your paint job.

Should You Buy Extra Paint? Understanding When to Stock Up

When planning your painting project, consider whether to purchase extra paint. Having a little extra on hand can be beneficial for touch-ups, future repairs, or if you need to apply additional coats. It's often recommended to buy an extra gallon, especially if you’re working with a bold color that might require multiple coats or if your walls have a textured finish. Additionally, paint formulations can change over time, so having the same batch ensures consistency in color and finish. Ultimately, investing in a little extra paint can save you time and hassle down the road.

For an estimate in litres using room measurements, try our paint calculator. It estimates paint quantity only; it is not a painting quote.