House & Renovation
Wall Filler Calculator
Calculate the amount of filler compound needed for smooth walls before painting or wallpapering.
For smooth walls, the key factors are area and layer thickness. This calculator estimates the filler compound needed in kilograms.
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Filler compound needed
Pro tips
- Several thin layers give a smoother result than one thick layer.
- Always allow enough drying time before painting.
All calculations are non-binding estimates provided without guarantee. For safety-relevant decisions (e.g. pool chemistry), please consult a professional.
Frequently Asked Questions
How much filler do I need per square meter?
It depends on layer thickness – at 1-2 mm, 1-1.5 kg/m² is usually enough; thicker leveling layers need proportionally more.
How many coats of filler do I need?
For minor unevenness, one coat is usually enough; for bigger holes or major unevenness, two thinner coats are often better than one thick one.
How long does filler need to dry?
Depending on layer thickness and product, usually 12-24 hours per coat before sanding or painting.
Do I need to prime before applying filler?
Yes, for absorbent or very uneven surfaces – a primer ensures even drying and better adhesion.