One liter of ready-made clay paint is sufficient for approximately 10 square meters when applied in a single coat. This coverage is indicative: the material and absorbency of the substrate affect how much paint is consumed. The color of the substrate, the chosen paint shade, and the number of coats required also affect the total amount.
Light shades, such as Villa, often require two coats on plaster or lining paper. With a dark shade, one coat may suffice. In both cases, the color of the substrate affects the opacity: a light substrate may show through dark paint, and a dark substrate through light paint.
On a surface with low absorbency, less paint is generally used for a single coat, but an even and opaque finish may require multiple applications. Therefore, the coverage of just one coat does not indicate the total amount of paint needed for the entire job.