Calcula tu pintura sin desperdicio.

La mayoría de los proveedores venden pintura por yarda cúbica. Para convertir el área a yardas cúbicas, usa esta fórmula:

Nuestra calculadora también multiplica el resultado por 0 toneladas/yd³ (la densidad estándar de pintura) para mostrar el peso estimado.

A paint calculator estimates gallons by dividing your total wall area by the coverage rate of your paint. The standard formula is: (2 x (Length + Width) x Wall Height) / Coverage per Gallon x Number of Coats. For a 12x12 room with 8-foot ceilings, that is 384 square feet of wall. At 350 sq ft per gallon, one coat needs 1.1 gallons.

Coverage rates are not universal. They depend on surface texture and paint quality. Smooth new drywall accepts 350 to 400 sq ft per gallon. Lightly textured walls (orange peel, knockdown) absorb more paint and yield 250 to 300 sq ft per gallon. Rough exterior surfaces like stucco or brick drop to 200 to 250. Always check the can label: manufacturers print the rated coverage, and premium paints consistently outperform budget lines.

Primer deserves its own calculation because it follows different rules. One gallon of primer covers roughly 300 sq ft. You need primer on new drywall (it seals the porous paper facing), bare wood, water stains, and any drastic color change. Our calculator includes a primer toggle: when enabled, it adds primer gallons at 300 sq ft per gallon with no waste factor, since primer goes on in a single sealing coat.

Brand coverage differences are real and measurable. In independent testing, Behr Marquee consistently achieves advertised one-coat coverage near 400 sq ft per gallon on smooth walls. Sherwin-Williams Duration and Emerald lines rate around 350 to 400 with superior hide on color changes. Benjamin Moore Regal Select performs similarly at 400 sq ft per gallon but at a higher price point. Budget contractor-grade paints may claim 400 but deliver closer to 300 in practice. When comparing prices, divide cost per gallon by actual coverage to find the true cost per square foot.

Do not forget the ceiling and trim if your project includes them. Ceilings use flat paint at the same coverage rate as walls: a 12x12 ceiling needs about 0.4 gallons per coat. Trim and doors use semi-gloss enamel, which covers roughly 400 sq ft per gallon because it levels smoothly. For a whole-room project, calculate walls, ceiling, and trim separately, then round each up to the nearest quart.