Paint

The paint calculator estimates how many litres of paint you need to cover a wall or ceiling. Enter the surface area, the number of coats and the coverage per litre to get the total paint volume.

Common use cases

• Interior wall and ceiling painting
• Exterior facade paint
• Primer and undercoat planning
• Estimating paint for renovation projects

How to use this calculator

1. Enter the wall length and height.
2. Enter the number of coats (usually 2).
3. Enter the coverage per litre (typically 10–12 m²/L).
4. Press Calculate to see the litres of paint needed.

Example calculation

A 5 m × 2.5 m wall (12.5 m²) with 2 coats at 10 m²/L coverage needs 2.5 L of paint.

Frequently asked questions

How much paint do I need per square metre?

About 0.1 L per m² per coat for smooth walls with standard emulsion (10 m²/L coverage).

How many coats of paint should I apply?

Two coats over a primer is standard; deep colours or covering dark walls may need three.

Do I need a primer?

Yes on new plaster, plasterboard, stains or strong colour changes; not needed for repainting a similar colour.

Should I deduct windows and doors?

Yes — subtract their area from the wall area for a more accurate estimate.