How to Calculate Paint
What is Paint?
A paint calculator estimates the number of litres needed to cover walls and ceilings based on room dimensions and paint coverage rates. Most standard emulsions cover 10–14m² per litre; masonry and exterior paints typically cover less (8–10m² per litre).
Step-by-Step Guide
- 1Calculate wall area: add all wall surfaces (length × height for each wall)
- 2Subtract doors (~2m²) and windows (~1.5m²) from the total
- 3Divide by coverage rate (m² per litre) for the paint type
- 4Multiply by number of coats (typically 2 for fresh colour, 1 for same colour)
Worked Examples
Frequently Asked Questions
What is Paint?
A paint calculator estimates the number of litres needed to cover walls and ceilings based on room dimensions and paint coverage rates. Most standard emulsions cover 10–14m² per litre; masonry and exterior paints typically cover less (8–10m² per litre)
How accurate is the Paint calculator?
The calculator uses the standard published formula for paint. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.
What units does the Paint calculator use?
This calculator works with inches, square metres, litres. You can enter values in the units shown — the calculator handles all conversions internally.
What formula does the Paint calculator use?
The calculator applies the standard formula for this type of calculation. See the 'How It Works' steps above for the detailed formula breakdown.
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