1. What is the House Paint Calculator?

The House Paint Calculator estimates the amount of paint needed for painting projects in the UK. It calculates the required paint volume based on surface area, paint coverage rate, and number of coats needed.

2. How Does the Calculator Work?

The calculator uses the paint formula:

Where:

• \( A \) — Total surface area to be painted (square metres)
• \( C \) — Paint coverage rate (square metres per litre)
• \( N \) — Number of coats required (unitless)

Explanation: The formula divides the total area by the coverage rate to get paint per coat, then multiplies by the number of coats for the total requirement.

3. Importance of Accurate Paint Calculation

Details: Accurate paint calculation helps avoid waste, ensures you purchase the right amount, saves money, and prevents project delays due to insufficient materials.

4. Using the Calculator

Tips: Measure wall areas accurately, check the paint can for coverage rates (typically 10-15 m²/litre), and consider applying primer for better results. Always add 10% extra for wastage.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical coverage rate for interior paint?
A: Most interior paints cover 10-12 m² per litre, but this varies by paint quality, surface texture, and application method.

Q2: How do I calculate wall area?
A: Measure wall height and width, multiply to get area. Subtract windows and doors (approx. 2 m² per window, 1.8 m² per door).

Q3: Should I include ceilings in the calculation?
A: Yes, if painting ceilings. Ceiling area = room length × width. Ceiling paint often has different coverage rates.

Q4: How many coats are usually needed?
A: Most projects require 2 coats for good coverage. Dark colours over light may need 3 coats. New surfaces often need primer first.

Q5: Does paint type affect coverage?
A: Yes, matt paints generally cover better than gloss. High-quality paints often provide better coverage with fewer coats.

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