Paint Formula:
The British Paints Paint Calculator helps determine the exact amount of paint needed for a painting project based on the surface area, paint coverage rate, and number of coats required. This ensures you purchase the right amount of paint without waste or shortage.
The calculator uses the paint calculation formula:
Where:
Explanation: The formula calculates the total paint volume needed by dividing the area by the coverage rate and multiplying by the number of coats.
Details: Accurate paint calculation prevents over-purchasing (saving money) and under-purchasing (preventing project delays). It also ensures consistent color matching across the entire project.
Tips: Measure the total surface area accurately, check the paint can for the specific coverage rate, and determine the number of coats needed based on surface condition and desired finish.
Q1: How do I measure the surface area accurately?
A: Measure length and height of each wall/ceiling, calculate area, and subtract windows/doors. For irregular surfaces, break into smaller regular shapes.
Q2: What is a typical coverage rate for paint?
A: Most paints cover 10-12 m² per litre, but this varies by paint type, surface texture, and application method. Always check the product specifications.
Q3: How many coats are usually needed?
A: Most projects require 2 coats for good coverage. Dark colors over light may need 3 coats, while light colors over light may need only 1 coat with quality paint.
Q4: Should I buy extra paint for touch-ups?
A: Yes, it's recommended to purchase 10-15% extra paint for touch-ups and future repairs.
Q5: Does surface texture affect paint coverage?
A: Yes, rough or porous surfaces require more paint than smooth surfaces. Textured walls may need 20-30% more paint than calculated.