How much paint and laminate for a 4.2 x 3.6 m bedroom?
A 4.2 × 3.6 m bedroom, 2.4 m high, with one door and one window, needs 7.614 L of wall paint, 3.326 L of ceiling paint and 16.632 m² of laminate from one set of measurements: 4 × 2.5 L tins (10 L) for the walls and 2 × 2.5 L tins (5 L) for the ceiling, for 2 coats at 10 m² per litre with 10% extra, and 9 packs of 2 m² (18 m²) for the 15.12 m² floor with 10% extra for cuts. These are generic example figures, not a product’s: use the figures on your tin and on your flooring pack.
This worked example paints the walls and ceiling of one rectangular bedroom and lays click-fit laminate over its timber upper floor. Both jobs are worked out from one set of measurements and come out as one shopping list.
How this example was made
It was worked out when this page was built, by the same room planner and formulas as the editable list. The room figures are round examples. Product coverage, pack and allowance figures are the planner’s labelled generic examples, not figures for a product.
AI tools drafted the page and automated tests compare its list with the planner. It has not been checked by a tradesperson or anyone outside the build. No price is shown or used.
The room and assumptions
Room: 4.2 m × 3.6 m, 2.4 m high; 1 door, 1 window. Work: painting and flooring.
- One rectangular room, 4.2 m × 3.6 m, 2.4 m high, measured in metres.
- 1 door, 1 window taken off the wall area; nothing is taken off the ceiling or the floor.
- Paint and flooring are worked out from the same room measurements. Nothing is measured twice.
- Wall paint and ceiling paint are separate products and are never added together.
- Every quantity is rounded once, at the end, up to whole packs. Working uses unrounded figures.
- Wall paint and Ceiling paint and Laminate use generic example figures, not the figures of any product. Enter the figures from the tin or pack for a closer answer.
The shopping list
16 lines marked Need and 6 marked Check first. Lines that this job does not need are left out here; the full planner shows them too.
Need
Wall paint
Need4 × 2.5 L tin (10 L)
Why?
Walls: 34.61 m², 2 coats at 10 m² per litre, plus 10% for waste and touch-ups.
Ceiling paint
Need2 × 2.5 L tin (5 L)
Why?
Ceiling: 15.12 m², 2 coats at 10 m² per litre, plus 10% for waste and touch-ups.
Sugar soap or wall cleaner
NeedWhy?
Paint grips a clean surface. One container does a room.
Abrasive paper or sanding sponges
NeedWhy?
For rubbing down filler and keying the surface.
Dust sheets or protective sheeting
NeedWhy?
To cover the floor and furniture: the floor is 15.12 m².
Roller frame and sleeves
NeedWhy?
One frame; a sleeve for each paint (2 here) is the usual way to avoid washing out between them.
Roller tray or scuttle
NeedWhy?
One, with liners if you want to skip washing up.
Brush for cutting in
NeedWhy?
For edges, corners and around fittings.
Extension pole
NeedWhy?
Ceiling work from the floor rather than steps.
Filling knife and scraper
NeedWhy?
For filling and for removing anything loose.
Dust mask, eye protection and gloves
NeedWhy?
Sanding makes dust; cleaners and fillers are best kept off skin and out of eyes.
Laminate
Need9 × 2 m² pack (18 m²)
Why?
Floor: 15.12 m², plus 10% for cuts and waste, in packs that cover 2 m² each.
Expansion spacers
NeedWhy?
A floating floor needs an expansion gap at every wall; the spacers hold it while you lay.
Threshold or door bar
Need1 × door bar
Why?
One for each doorway: 1 door in this example.
Fitting kit: tapping block, pull bar, saw
NeedWhy?
To close the joints and cut the ends of rows.
Knee pads, gloves and a dust mask for cutting
NeedWhy?
Laying is done kneeling; cutting boards makes dust.
Check first
Filler for cracks and holes
Check firstWhy, and what to check
Small cracks and screw holes are filled and sanded before painting.
Check: How much depends on the walls: a small tub or a tube is usual for a sound room, more where paint is flaking. Look at the walls before you buy.
Decorator's caulk
Check firstWhy, and what to check
Seals the gaps where walls meet skirting, architraves and ceiling: about 41.286 m of edges in this room.
Check: How many tubes depends on the size of the gaps and how much of that edge needs sealing; the tube says how far it goes.
Masking tape
Check firstWhy, and what to check
To protect skirting, frames and fittings: about 41.286 m of edges in this room. Rolls are commonly 25 m or 50 m.
Check: How much you mask is your choice; a cutting-in brush replaces most of it. Buy by the roll length against the edge length above.
Underlay
Check firstWhy, and what to check
Most floating floors need underlay under them: 16.63 m² to cover here, the same area as the flooring.
Check: Whether you need it depends on the floor: some have underlay attached, glued-down floors take none. If you do, enter the roll coverage and it will be worked out.
Underlay joining tape
Check firstWhy, and what to check
Seals the joins between underlay strips, and a membrane's overlaps.
Check: One roll usually does a room; the roll length and the number of joins decide.
Beading, scotia or new skirting
Check firstWhy, and what to check
Covers the expansion gap round the room: about 14.838 m of wall, not counting doorways.
Check: Sold in lengths (2.4 m is common). Whether you need it depends on whether the skirting comes off and goes back over the floor. Divide the length above by the length sold and round up.
Before you use it
- Measure the room, door and window again.
- Use the coats, coverage and tin sizes from the paint, and the square metres per pack from the flooring.
- Check the walls for filler or primer, and the subfloor, underlay, expansion gap and threshold as one system.
Built and checked with AI tools, not yet by a tradesperson or anyone outside the build. Estimates are arithmetic on your measurements and the figures shown with them: follow each product's own instructions.