Calculate how many packs of laminate, wood, or vinyl flooring you need. Enter room dimensions and pack coverage to get exact quantities with waste.
Calculate floor, wall, and sloped surface areas from dimensions
Straight lay: 5-10% waste. Diagonal: 10-15%. In rooms with lots of doorways, alcoves, or irregular shapes: 12-15%. Always buy full packs — you can't buy individual planks.
Laminate and engineered wood must acclimatise in the room for 48 hours before installation. Leave boxes flat, unopened, in the centre of the room. Do not install cold flooring in a warm room — it will expand and buckle.
Standard foam underlay: 3mm, for sound reduction only. Wood fibre underlay: 5-7mm, for sound and thermal insulation. Combination underlay with DPM: for concrete subfloors. Always use the manufacturer's recommended underlay.
Leave a 10mm expansion gap at all doorways and edges. Use T-profiles for same-height transitions, reducer profiles for different heights. Measure doorway widths before ordering transition strips.
A = length × width
A_total = A × (1 + waste%)
packs = ceil(A_total / pack_coverage)
cost = packs × price_per_pack
For solid wood flooring (not engineered), installation over underfloor heating requires specialist advice. For concrete subfloors with high moisture content, a damp-proof membrane is essential. Uneven subfloors (deviation >3mm over 2m) need self-levelling compound before installation.
Area = 12 m². With 10% waste: 13.2 m². If each pack covers 1.48 m²: ceil(13.2 / 1.48) = 9 packs. Check the pack — coverage varies by manufacturer and plank thickness.
Order the same area as your flooring plus 5% waste. Underlay comes in rolls (typically 10 m² or 15 m²) or as click-together tiles. For 12 m²: order 15 m² of underlay.
Yes, if the floorboards are flat and secure. Use combination underlay with DPM over concrete. Over wooden subfloors, lay at 90° to the existing floorboards for stability. Check for squeaks and fix before installation.
10mm minimum around all edges, doorways, and fixed obstacles (pipes, radiators). The gap is hidden by skirting boards or scotia/quarter-round beading. Failure to leave gaps causes buckling.