Estimating paint coverage: A practical calculation guide (metrics)

Measure the length and height of each wall you plan to paint. Multiply these figures to get the area of each wall. Add the areas of all walls together to get the total area. Dont forget to deduct the area of windows and doors.

Paint coverage refers to the area a litre of paint can cover, usually expressed in square metres per litre (m²/L). This figure is often provided on the paint can. Lower coverage means youll need more paint for the same area.

Multiply the total area you need to paint by the number of coats you plan to apply. For example, if your total area is 50 m² and youre applying two coats, youll need to cover 100 m².

Multiply the area in square feet by 0.0929 to get the area in square metres. This conversion is important if youre using paint coverage information provided in square feet.

Its wise to add a wastage factor of 10-15% to your paint estimate to account for spills, drips, and uneven surfaces. This ensures you have enough paint to complete the job without running short.

Paint coverage information is typically listed on the paint can or product description online. Check the manufacturers website or ask the retailer for details on specific paint brands available in Singapore.

The texture and porosity of the wall surface, the application method (brush, roller, or spray), and the colour difference between the old and new paint can all affect paint coverage. Rougher surfaces and darker colours require more paint.