United Kingdom · square metres / litres / GBP

Ceiling paint calculator — area, coats & litres

Calculate ceiling paint separately from walls. Use ceiling area, subtract openings and compare complete containers for your chosen paint.

Sage paint tins, a roller, a tray and paint swatches beside a miniature wall — Plan paint and primer quantities with your chosen coverage and coats.

Make your painting plan

Save or reuse room measurements

Save full room measurements in the room planner to reuse them here. Measurements stay in this browser tab.

1. Measure your surfaces

Starting measurements are an example room. Replace them with your own. Ceiling openings start at zero.

How will you measure?

Room 1

Length (m)Width (m)Ceiling openings (m²)

Enter ceiling openings as an area to subtract. Each row is a separate rectangular ceiling. For sloped or irregular ceilings, enter their measured paintable area.

Extra paint allowance

Extra paint allowance (%)

Starts at 0%. Coats are calculated separately.

2. Ceiling paintProduct or manual details

Product source and coverage notes

Coverage (m²/L)Number of coats

Container sizes and optional prices

Available container sizes

Keep all sizes the same formulation, colour and finish. Leftover primer cannot replace finishing paint.

Your shopping list will appear here after you choose your project and measurements.

Multiple rooms share one wall colour and product. Calculate different colours as separate projects. Quantity estimates do not establish primer/topcoat compatibility.

Ceiling paint has its own quantity

A flat rectangular ceiling uses length × width, minus any ceiling openings. Wall height and door/window deductions do not affect that ceiling area. For sloped or irregular ceilings, enter their measured paintable area.

A 4 × 3 m ceiling is 12 m². At 10 m² per litre and two coats, it needs 2.4 litres before extra allowance.

Coverage and coats change the result

Paintable m² × coats ÷ coverage per litre
Apply your optional extra allowance, then round to available containers.

Manufacturer ranges use their lower coverage value by default. A quoted “up to” coverage is not a guarantee on every surface. Check porosity, colour change, application method and preparation; adjust the form to your current label.

Are the displayed prices current?

Store prices are dated snapshots. After seven days, product-based costs are withheld; quantities remain available for up to 30 days before specifications also need a refresh. Manual details use the numbers you enter.

Can I mix litres and US gallons?

Choose the matching country tool and label units. A US gallon and an imperial gallon are different. This pilot does not convert a UK product into a US product or combine their offers.

UK paint & primer sample

Recorded coverage is a planning input. Product selection does not approve it for your surface or another coating. UK prices cover a small Wickes sample; US records contain manufacturer specifications, with prices entered by you.

Product specifications and source links; no reviews or suitability rankings
Recorded product	Coverage per coat	Recorded coats	Container sizes	Price	Source
Dulux Matt Emulsion Paint - Pure Brilliant White - 2.5L	13 m²/L	Confirm on label	2.5 L	£22.00 · recorded 2026-10-14	Wickes ↗
Dulux Matt Emulsion Paint - Pure Brilliant White - 5L	13 m²/L	Confirm on label	5 L	£26.00 · recorded 2026-10-14	Wickes ↗
Dulux Easycare Washable & Tough Matt Emulsion Paint - Pure Brilliant White - 2.5L	13 m²/L	2	2.5 L	£27.00 · recorded 2026-10-14	Wickes ↗
Dulux Easycare Washable & Tough Matt Emulsion Paint - Pure Brilliant White - 5L	13 m²/L	2	5 L	£38.00 · recorded 2026-10-14	Wickes ↗
Dulux Easycare Bathroom Soft Sheen Emulsion Paint - Pure Brilliant White - 2.5L	13 m²/L	Confirm on label	2.5 L	£27.00 · recorded 2026-10-14	Wickes ↗
Wickes Matt Emulsion Paint - Pure Brilliant White NO.0 - 2.5L	13 m²/L	Confirm on label	2.5 L	£13.00 · recorded 2026-10-14	Wickes ↗
Zinsser Bulls Eye 123 Primer Sealer - White - 2.5L	10 m²/L	Confirm on label	2.5 L	£38.00 · recorded 2026-10-14	Wickes ↗