* **Area Calculation:** Assumes rectangular rooms and calculates for all four walls. Ceiling is not included.
* **Door/Window Sizes:** Standard sizes are used (Door: 2m x 0.8m; Window: 1.2m x 1m). Adjust your inputs accordingly if your openings differ significantly.
* **Paint Coverage:** The default coverage rate is an average. Always refer to your specific paint product's label for accurate coverage rates.
* **Disclaimer:** This tool provides an estimate. Factors like surface texture, paint type, application method, and spills can affect actual paint consumption. Always round up when purchasing.