Category
Home improvement calculators
Free DIY home improvement quantity calculators. Paint litres for any room (with doors, windows, coats, waste buffer), tile count for floor or wall with pattern waste, concrete for slabs/columns/stairs, wallpaper rolls with pattern repeat, and carpet with seam allowance. UAE pricing context included.
5 calculators in this category.
Paint Calculator
Litres of paint for any room — doors, windows, coats, waste
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Tile Calculator
Floor and wall tile count with waste buffer by pattern type
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Concrete Calculator
Cubic metres for slabs, footings, columns, stairs
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Wallpaper Calculator
Rolls for a room with pattern-repeat waste
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Carpet Calculator
Square metres of carpet and underlay with seam allowance
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Frequently asked questions
How much waste should I budget for tiling?▾
10% for a straight layout in a square room. 15% for diagonal or herringbone patterns. 20% for irregular-shaped rooms with lots of cuts. The Tile Calculator applies these defaults automatically; you can override with custom waste %.
How many litres of paint for a typical room?▾
Rough estimate: 1L covers ~11m² with one coat. So a 4×5m room with 3m ceilings, walls only (after doors/windows): ~50m² × 2 coats ÷ 11 = ~9 L plus 10% waste = ~10 L. The Paint Calculator does this precisely.
Should I use ready-mix or bag concrete?▾
Under 1 m³ project: bag-mix is simpler (40 bags = 1 m³). Over 3 m³: ready-mix delivery saves time and cost (AED 220-280/m³ in UAE). Between 1-3 m³: judgment call. The Concrete Calculator shows both bag-equivalent and ready-mix truck counts.
Why does wallpaper pattern repeat matter?▾
Patterns must align between strips, which forces longer strips and more waste. Free match: no alignment, lowest waste. Straight match: pattern aligns horizontally, medium waste. Drop match (offset): pattern offsets diagonally, highest waste. Always check the wallpaper label for the repeat distance.
Do I need an underlay under carpet?▾
Recommended for any carpet above budget grade. Underlay extends carpet life by 2-3x, dampens noise, and adds insulation. UAE concrete floors particularly benefit. The Carpet Calculator includes underlay area + cost so you don't forget it.