When it comes to painting your home, one of the most common challenges is estimating the right amount of paint. Overbuying means wasting money and product, while underbuying leads to multiple trips to the store and uneven coats. From my experience, the key is to start by measuring the total square footage of the walls and ceilings you want to paint. Remember to subtract areas like windows and doors to avoid overestimating. Many people get overwhelmed trying to use complicated online paint calculators, but these tools often require detailed input and can be confusing. Instead, a simple rule of thumb is that one gallon of paint covers around 350 square feet of smooth surface with one coat. Of course, this varies depending on the paint brand, surface texture, and number of coats desired. Another tip is to consider the type of paint finish. Glossy and semi-gloss paints tend to require fewer coats than flat or matte finishes, possibly reducing the total amount of paint needed. Also, primer should be factored in if you’re painting over unpainted or dark surfaces — it helps coverage and durability but adds to paint requirements. From painting a 2-room apartment to a 5-room house, breaking down the project into smaller sections helps manage quantities more accurately. For example, calculate paint for each room separately and then sum up the totals. This is especially helpful if different colors or finishes are planned in each space. Lastly, always buy a little extra paint than calculated, about 10% more, to account for touch-ups and slight miscalculations. Store the leftover paint properly for future repairs or room refreshes. In summary, ditch the guesswork and make your next painting project more efficient by focusing on square footage calculations, subtracting areas not painted, factoring in paint type and surfaces, and buying a bit extra. This approach helps achieve a beautiful, professional-looking finish without wasting resources.