Flooring Calculator
Calculate flooring needed for your room instantly. Free flooring estimator for tiles, wood.
Room Dimensions
Flooring Details
Typical: 10% for straight lay, 15% for diagonal
Calculation Results
(2.2 m² per pack)
Cost Estimate
Total Cost
GBP 350.00
Tips for Accurate Estimates
- Measure your room carefully, including alcoves and corners
- Add extra wastage if cutting complex angles or using directional patterns
- For diagonal layouts, use 15% wastage instead of 10%
- Always round up the number of packs to ensure you have enough
- Check with your supplier for exact pack coverage and pricing
Square Metres, Wastage and Whole Packs
A 5m by 4m room is 20 m². Add the standard 10 percent wastage allowance for straight-laid laminate or LVT and you need 22 m² of material. If your chosen pack covers 2.2 m², that is exactly 10 packs. Always round up; coming back to the merchant a week later for one extra plank usually means a different dye lot and a noticeable colour band running through the floor.
Wastage is not optional padding, it is the unavoidable cost of cutting around door frames, alcoves and pipework. Diagonal layouts push wastage to 15 percent because every cut leaves a triangular offcut too small to use. Herringbone and chevron patterns climb to 20 percent. Tilers planning a busy mosaic floor often allocate 25 percent and treat the leftovers as future repair stock.
Real Costs Beyond the Headline Price
Pack price is only one line of the bill. Underlay for laminate runs around £4 to £8 per m². Beading and threshold strips add £20 to £60 per room. Adhesive for engineered wood is £30 to £50 per 5kg tub. Tile spacers, grout and SBR primer push tile installations up by another £50 to £100. A £35 pack covering 2.2 m² works out at £15.91 per m² in materials alone, then realistically £25 to £35 per m² fitted by a tradesperson.
The calculator shows packs needed and total cost based on the rounded-up figure, so the result already reflects what you will actually carry out of the shop. Save the offcuts in the loft. Floors get scratched, water gets spilt, and the £30 stash of spare planks you tucked away in 2026 is the difference between a quick swap and replacing the whole room in 2031.
Frequently Asked Questions
How much wastage should I add for flooring?
Add 10 percent for standard straight-laid laminate, vinyl or LVT. Add 15 percent for diagonal layouts. Herringbone, chevron and complex tile patterns need 20 to 25 percent. Rooms with multiple alcoves or unusual shapes also benefit from the higher allowance.
How do I measure an L-shaped or irregular room?
Split the room into rectangles, calculate each separately, then add the totals. For curves or angled walls, draw the shape on paper, divide it into right-angled triangles and rectangles, and use the area of each. Always measure twice and add 10 percent wastage to the combined total.
Should I include the floor under the kitchen units?
If you are replacing the units at the same time, yes - tile or laminate the full floor. If the kitchen units are staying, you only need to floor the visible area but allow an extra 30cm tucked under the kickboard so future repairs do not show a different shade where the kickboard has been moved.
How accurate is this flooring calculator?
The result reflects a clean rectangular room with the wastage you select. For complex layouts, awkward thresholds, or rooms with lots of alcoves, treat the figure as a starting point and ask the merchant to double-check before you order.
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