Know what to buy before you start the job
47 free calculators for UK building, garden and home projects. Get the bags, tonnes, rolls and tins to order, see the working, and keep it all on one shopping list.
Most used
- Square metre calculatorWork out the area of a room, wall, floor or lawn in square metres.
- Concrete calculatorWork out how much concrete you need for a slab, a footing, post holes or steps.
- BTU calculatorWork out how many BTU per hour a room needs to stay warm on a cold day.
- New boiler cost calculatorWork out what a new gas boiler costs, fitted, in your part of the UK.
- Gravel calculatorWork out how much gravel, pea shingle, slate or MOT Type 1 you need for a driveway, path or border.
- Decking calculatorWork out how many decking boards, joists and screws you need for a deck.
- Wallpaper calculatorWork out how many rolls of wallpaper you need for a room or a feature wall.
- U-value calculatorWork out the U-value of a wall, roof or floor from the layers it is made of.
- Tile calculatorWork out how many tiles you need for a floor or a wall, and how many boxes to buy.
- Roof replacement cost calculatorWork out what a new roof might cost.
- Brick calculatorWork out how many bricks or concrete blocks you need for a wall.
- Conservatory cost calculatorWork out the cost of a conservatory in the UK.
Browse by job
- BuildingConcrete, bricks, mortar, plaster, timber and stairs
- GardenGravel, topsoil, turf, decking, fencing and paving
- DecoratingPaint, wallpaper and tiles
- FlooringCarpet and laminate
- Heating & energyBTU, radiators, insulation, U-values and solar
- CostsWhat common home jobs cost in the UK
- PlanningPlanning permission and party wall notices
- ConvertersSquare metres, cubic metres and tonnes
- Free toolsShopping list, quote checker and more
Why trust these numbers
Sourced figures
Bag yields, densities and coverage rates come from UK manufacturers, merchants and standards. Each page lists its sources.
The working is shown
Every result explains the steps with your own measurements, so you can check it or show it to your builder.
Dated prices
Cost pages show ranges from published UK cost guides, with the date we last checked them.