Wall Paint Calculator UK

Paint Formula:

\[ \text{Paint (litres)} = \frac{A}{C} \times N \]

Wall Area (A):

square metres

Coverage Rate (C):

square metres per litre

Number of Coats (N):

coats

Paint Needed:

1. What is the Wall Paint Calculator?

The Wall Paint Calculator UK helps homeowners and professionals calculate the exact amount of paint needed for painting walls in the UK. It considers wall area, paint coverage rate, and number of coats required.

2. How Does the Calculator Work?

The calculator uses the paint calculation formula:

\[ \text{Paint (litres)} = \frac{\text{Wall Area (m²)}}{\text{Coverage Rate (m²/litre)}} \times \text{Number of Coats} \]

Where:

Wall Area (A) — Total surface area to be painted in square metres
Coverage Rate (C) — How many square metres one litre of paint covers
Number of Coats (N) — How many layers of paint are needed

Explanation: The formula calculates the base amount of paint needed for one coat, then multiplies by the number of coats required for complete coverage.

3. Importance of Accurate Paint Calculation

Details: Accurate paint calculation prevents wastage, saves money, and ensures you have enough paint to complete the job without interruptions. It's especially important for large projects and when using expensive paints.

4. Using the Calculator

Tips: Measure wall area accurately, check the paint can for coverage rates (typically 10-15 m²/litre for emulsion), and consider an extra 10% for wastage. Always round up to the nearest litre when purchasing.

5. Frequently Asked Questions (FAQ)

Q1: How do I calculate wall area?
A: Measure height and width of each wall, multiply to get area, then add all wall areas together. Don't forget to subtract windows and doors.

Q2: What's a typical coverage rate for UK paints?
A: Most emulsion paints cover 10-15 m² per litre. Matt paints usually cover more than silk or gloss finishes.

Q3: How many coats are usually needed?
A: Most walls need 2 coats. Dark colours over light may need 3 coats. New plaster may require a mist coat first.

Q4: Should I add extra for wastage?
A: Yes, add 10-15% extra for cutting in, roller wastage, and touch-ups. It's better to have a little left over than run out.

Q5: Does this work for ceilings and woodwork?
A: The same formula applies, but coverage rates differ. Ceiling paint typically covers better, while woodwork paints cover less area per litre.