Ceiling Paint Calculator — Litres and Cans for Any Room
Ceilings are often overlooked in paint estimates — they need their own coat (usually white or off-white) and frequently require two coats when going over a stained or discoloured surface. This calculator gives you a precise litre count so you never run short.
How we calculate
Ceiling area = length × width. Paint = (area ÷ coverage per litre) × coats × (1 + waste %). Cans = ⌈paint litres ÷ can size⌉.
Worked example
A 4 m × 3 m ceiling = 12 m². Two coats at 12 m²/L with 10% waste: paint = (12 ÷ 12) × 2 × 1.1 ≈ 2.2 L → 1 × 2.5 L can.
Common mistakes
- •Using wall paint on ceilings — dedicated ceiling paint is flatter and designed to resist drips.
- •Skipping a second coat after a water stain — stains bleed through single coats.
- •Not including the ceiling in your overall room estimate.