Flooring Calculator

Flooring quantity is calculated by measuring the room area (length × width) and adding a waste allowance. For laminate and engineered wood, 10% extra is standard for straight layouts and 15% for diagonal or herringbone patterns. Vinyl and carpet are sold by the linear metre from rolls (typically 2 m or 4 m wide), so you calculate based on roll width and room dimensions.

This calculator supports rectangular rooms, L-shaped rooms and irregular shapes. For an L-shape, split the room into two rectangles, calculate each separately and add them together. The calculator also estimates underlay if needed (most laminate and engineered wood requires underlay; carpet has its own).

Enter room dimensions and flooring type. The calculator shows total area, area including waste, number of packs (laminate and wood are sold in packs covering 1.5–2.5 m²) or linear metres (carpet, vinyl). It includes an estimated cost per m² for budget, mid-range and premium options.

How much flooring do you need? Floor area = length × width. Plus add waste allowance: 5-7% for plank/strip flooring (cuts and offcuts); 10% for tiles (cutting waste); 15% for diagonal or herringbone patterns; 5% for large vinyl sheets. Example: 4m × 3m room = 12 m². With 10% waste = 13.2 m² of flooring needed. Buy by complete packs — coverage per pack varies (laminate typical 2.2 m²/pack; engineered wood 1.5-2.0 m²; ceramic tiles depends on size). Always order from same batch for colour consistency.

UK flooring types and costs per m². Carpet £8-£40/m² (budget Berber to wool); vinyl sheet £10-£25/m²; LVT (luxury vinyl tile) £20-£60/m² fitted; laminate £8-£35/m² (£15-£25 mid-range); engineered wood £25-£80/m²; solid hardwood £40-£120/m²; ceramic tiles £15-£60/m²; porcelain £25-£70/m²; natural stone (limestone, slate) £40-£120/m². Underlay extra £3-£8/m². Fitting labour £15-£30/m² for laminate; £20-£40 for engineered; £40-£80 for tiling. Carpet fitting usually included.

Subfloor preparation — the hidden cost. Existing subfloor must be flat (max 3mm variance over 2m), dry (moisture <2.5% for wood), and clean. Self-levelling compound £12-£18/bag covers ~4 m²/bag. Concrete subfloor moisture testing essential before any wood flooring — false savings if you skip this and ruin £2,000 of timber. Plywood overlay 6mm for uneven floorboards £15-£25/m² installed. Suspended floors: check joists, replace rotted timber. Plumber/electrician access: lift loose-laid floors easily; nailed/glued = pricier rework.

Choosing flooring by room. Bathrooms: vinyl, LVT, ceramic tiles — water-resistance critical. Avoid laminate (swells with moisture). Kitchens: LVT, tiles, engineered wood (sealed). Living rooms: carpet (comfort), engineered wood (aesthetic), LVT (practical). Bedrooms: carpet most common UK choice, but wood/laminate easier to maintain. Hallways/high-traffic: hardest-wearing — laminate AC4 rated, engineered wood with thick wear layer (3mm+), LVT 0.5mm+ wear layer. Stairs: carpet safest (grip + sound); wood looks great but slippery — non-slip strips required.

Underlay and insulation matter. Required under: laminate, engineered wood (floating install). Optional under carpet (luxury). Foam underlay £3-£6/m² standard; rubber/felt £8-£15/m² for sound reduction. Acoustic underlay reduces impact noise — vital for flats above flats (lease may require). Underfloor heating: requires thin, conductive underlay (tog value under 1.0) — most thick underlays insulate AGAINST heat. Damp-proof membrane required over concrete subfloors. Wickes/Screwfix/B&Q stock all standard underlays — independent flooring shops sometimes cheaper for premium products.