Paint Quantitiesarea x coats / coverage
Internal Area
Trim Items
Total LitresCalculator
Painting & decoration calculator
Estimate paint quantities and approximate cost for walls, ceilings, doors, skirting, and optional external painted surfaces.
Painting Quantities
Estimate paint litres and an early decorating allowance.
Combine internal wall and ceiling area, trim items such as doors and skirting, and optional external area to build a fast planning figure.
Results
Internal Area0.00 m2
Trim Area0.00 m2
External Area0.00 m2
Internal Paint0.0 L
Trim Paint0.0 L
External Paint0.0 L
Total Paint0.0 L
Approx. Cost£0.00
This tool is for guidance only. Final paint quantities vary with preparation, substrate condition, porosity, specification, the exact number of coats, and how much trim or detail work is included.
What This Tool Helps With
Useful for quick decorating allowances before a full trade take-off.
- Sense-check paint litres across internal surfaces, trim, and optional external work.
- Capture doors and skirting rather than looking at wall area alone.
- Compare coat counts, coverage rates, and paint costs quickly.
- Export a branded summary for internal review or client discussion.
Important Note
This is a planning tool, not a full decorating schedule.
Final painting quantities still depend on substrate preparation, filling and rubbing down, primer systems, specification, colour changes, access, and whether trim items are included fully. Use the calculator as a first pass before ordering materials or pricing labour.
Related Tools
Useful next calculators and estimating pages.
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Useful if the next check is wet-applied wall finish volume rather than paint spread and coverage.
Open Render CalculatorPlasterboard & Drylining Calculator
Useful if you need to estimate boarded lining areas before moving into decorating quantities.
Open Drylining CalculatorConstruction Calculators Hub
Browse the full calculator section if you want to compare all available tools in one place.
View CalculatorsCommon Questions
Quick answers about the painting and decoration calculator.
What does the painting and decoration calculator estimate?
The calculator estimates paint quantities and approximate cost for internal wall and ceiling areas, trim items such as doors and skirting, and optional external painted area.
Can it include walls, ceilings, doors, skirting and external painting together?
Yes. The calculator combines internal area, trim quantities, and optional external area so you can build a wider decorating allowance in one place.
Why are there separate coverage rates and costs?
Different paints often have different spread rates and costs. Internal emulsion, trim finishes, and external masonry or facade coatings are usually priced and applied differently.
Does this replace a full decorating take-off?
No. It is intended for early planning only. Final quantities still depend on substrate condition, preparation, specification, number of coats, access, and the exact scope of work.
Next Step
Need a formal estimate beyond a quick decorating quantity check?
Use the calculator as a starting point, then get in touch if you need project-specific estimating support, take-off, or structured quantity review for live construction work.