How Much Paint Do You Need for Your Project?

November 6, 2025

Running out of paint midway through a job can be frustrating, while buying too much leaves you with costly leftovers. Finding the right balance starts with accurate measurement, a bit of planning, and guidance from trusted experts at a reliable paint supply store. According to IBISWorld, the Canadian paint manufacturing market brings in over $2 billion in yearly revenue, reflecting how vital paint products are to both homeowners and professionals across the country.

A hand using a blue paintbrush to stain a wooden fence with a natural finish.

Start by Measuring Your Space Accurately

Before picking up a brush, take the time to measure your walls or surfaces carefully. Multiply the height by the width of each wall to determine total square footage, then subtract doors, windows, and large openings. Precision matters because even small miscalculations can lead to underestimating or overbuying paint. Once you know your total area, most paint cans list coverage information, typically around 350 to 400 square feet per gallon, depending on texture and porosity.

Different surfaces absorb paint at varying rates. Unfinished wood, textured plaster, or masonry may need extra coats, while smooth drywall typically requires less. By accounting for these differences early, you’ll have a more realistic idea of how much paint your project requires and avoid multiple last-minute trips to the paint supply store.

Factor in the Number of Coats You’ll Need

Paint coverage depends on colour choice, quality, and the type of surface you’re coating. If you’re covering a dark shade with a lighter one, you’ll likely need an extra coat for even results. High-quality paints from trusted brands like Benjamin Moore often provide better coverage in fewer coats, saving both time and product. That’s one reason experienced professionals prefer investing in quality rather than applying multiple layers of inexpensive paint.

Always plan for at least two coats on most surfaces, plus touch-ups. Some textures, like rough brick or old stucco, may require additional paint to reach full depth and consistency. Visiting a knowledgeable paint supply retailer ensures you get expert input on how much product to purchase for your specific situation.

Don’t Forget About Priming

Primer often goes overlooked when people calculate paint quantities, but it plays an essential role in achieving long-lasting results. A good primer seals porous surfaces and helps the topcoat adhere properly. This can actually reduce the total amount of paint you’ll need because it prevents over-absorption on the first coat.

If you’re repainting a darker wall or switching between very different colours, primer becomes even more important. Tinting the primer to a similar shade as your topcoat can improve coverage and reduce how much colour paint you’ll need overall. Asking your paint supply expert for guidance on primer options will help you stretch your budget while ensuring an even finish.

Account for the Type of Paint and Finish

Different finishes have slightly different coverage rates. Flat and matte paints absorb more, while glossier finishes stretch a bit further because of their smoother consistency. Latex paints tend to cover larger areas than oil-based options, but they might need extra coats for a uniform look on some surfaces.

Before purchasing, consider where the paint will be applied. High-traffic areas like hallways or kitchens benefit from durable finishes such as eggshell or satin, which can withstand cleaning and minor scuffs. For outdoor projects, exterior-grade formulas with UV protection and mildew resistance are worth the investment. Getting advice from experienced staff at your local paint supply center can help you match the right finish to your project, and buy the correct quantity the first time.

In some cases, certain paint supply stores also offer sample sizes or coverage calculators to help you test before you commit.

Use Leftovers Wisely and Store Them Correctly

If you end up with extra paint, storing it properly will make it last for future touch-ups. Seal cans tightly, wipe away excess paint from the rim, and keep them in a cool, dry place away from direct sunlight. Label each can with the room and colour code for easy reference later.

Even a small amount can come in handy when repairing scratches or small wall blemishes months down the line. When you’ve finished a project and no longer need leftover paint, many community recycling centers accept unused or partially used cans for proper disposal. Responsible handling not only helps the environment but also keeps your paint supply area organized for your next home improvement plan.

Plan Ahead and Buy the Right Amount

Determining exactly how much paint to buy doesn’t have to be complicated. With accurate measurements, the right tools, and expert advice, you can approach any project confidently. For personalized guidance and premium-quality products, visit Crowfoot Paint and Design, your trusted source for professional-grade paint supply solutions that help every project look its best from the first coat to the final touch.

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