Builder tools
Home improvement calculators for United Kingdom
Every tool uses square metres, GBP pricing fields and VAT handling, with formulas that are documented and unit-tested.
Project category
Concrete & Masonry
Volume, slab, footing and masonry material calculators.
- Concrete Slab CalculatorEnter your slab dimensions in metres and millimetres to get the cubic metres of ready-mixed concrete to order, with wastage and an optional VAT-aware cost estimate.
- Concrete Volume CalculatorEnter your pour dimensions in metres and millimetres — rectangular or cylindrical — to get the cubic metres of ready-mixed concrete to order, with wastage and an optional VAT-aware cost estimate.
- Concrete Cost Calculator UK — Ready-Mix Quote TotalTurn a current ready-mixed concrete supplier quote into an itemised GBP supply total while keeping physical volume, billed volume, fees and VAT separate.
Project category
Flooring & Tile
Flooring, tile and underlay quantity and cost calculators.
- Tile and Grout Calculator with Spacer Width UKEnter the tiled area in metres, tile dimensions and spacer width in millimetres, tile allowance, and the grout coverage printed for that exact tile and joint. Tiles and grout are rounded as separate purchases.
- Flooring CalculatorEnter your room dimensions in metres to get the square metres of flooring to buy, the number of packs, and an editable cost estimate, with a wastage allowance for cuts and spares.
Project category
Painting & Walls
Paint coverage and wall finish calculators.
- Paint Calculator for Walls and Ceiling UKEnter the room dimensions in metres to calculate two-coat wall and ceiling emulsion separately. The wall takeoff deducts doors and windows; the ceiling uses length × width and keeps its own coverage, tin size, and optional price.
- Wallpaper Calculator UK — Rolls with Pattern RepeatEnter the wall run and exact wallpaper label details to count full-height drops, simulate the pattern-match sequence, and round the result to whole rolls.
Project category
Walls & Insulation
Drywall, plasterboard, stud and insulation calculators.
- Plasterboard CalculatorEnter your room dimensions in metres to get the number of plasterboard sheets to buy, with standard opening deductions, a wastage allowance and an optional VAT-aware cost estimate.
- Plasterboard Ceiling Calculator UK — Area & Layout ChecksMeasure up to three non-overlapping ceiling rectangles, compare area and both board orientations, then choose an explicit order basis without hidden offcut assumptions.
- Stud Wall Cost Calculator UK — Timber, Plasterboard & InsulationChoose framing only, framing plus plasterboard, or the full insulated partition; then enter one straight wall, specified centres, openings and exact sale units for a scoped UK takeoff.
Project category
Landscaping
Mulch, gravel, soil and outdoor material calculators.
- Mulch Calculator — Bags vs Bulk Cost UKEnter border measurements, depth, bag litres, the supplier's bulk increment, and optional prices to compare independently rounded bag and bulk orders.
- Soil Calculator UK — Topsoil in m³ & Bulk BagsEnter inside bed dimensions in metres, unfilled depth in millimetres, and your supplier’s actual m³ or litre package sizes to estimate topsoil without guessing a tonnes-to-volume conversion.
- Gravel CalculatorEnter the area dimensions in metres and the gravel depth in millimetres to get the cubic metres and tonnes to order, with wastage and an optional VAT-aware cost estimate.
Project category
Decks & Fences
Decking, fence post and panel calculators.
- Fence Cost Calculator per Metre UK — Posts and PanelsEnter one straight fence length or list every straight section, then add actual panel width, gates and supplier prices to get posts, panels, a VAT-aware material total and a comparable cost per metre.
- Decking Calculator — Boards, Joists, and FixingsEnter metric deck dimensions and the approved board, joist, and fixing layout to get boards, joists, regular fixings, whole packs, and optional entered-price cost.