New Bathroom Calculators
Fitting a new bathroom involves tiling, plumbing, electrics, ventilation, waterproofing, and finishing. We've gathered every calculator you'll need for a bathroom project, from initial cost estimation through to the final coat of paint.
Tiling
Wall Tile Calculator
Calculate wall tiles, adhesive and grout for bathroom walls.
Floor Tile Calculator
Floor tile quantities including cuts and wastage allowance.
Tile Adhesive Calculator
Adhesive quantities for walls and floors by tile size and type.
Grout Calculator
Grout quantities based on tile size and joint width.
Plumbing & Heating
Pipe Sizing Calculator
Correct pipe diameters for hot and cold water supply.
Towel Rail Sizing Calculator
Size your heated towel rail for the bathroom.
Radiator Sizing Calculator
BTU output needed if fitting a radiator instead of a towel rail.
Boiler Size Calculator
Check your boiler can handle the additional bathroom.
Hot Water Cylinder Sizing Calculator
Size your hot water cylinder for increased demand.
Ventilation & Waterproofing
Flooring
Screed Calculator
Screed volume if levelling the bathroom floor.
Self-Levelling Compound Calculator
Levelling compound for uneven bathroom floors before tiling.
Underfloor Heating Coverage Calculator
Electric UFH mat sizing for bathroom floors.
Vinyl Flooring Calculator
Vinyl flooring quantities if not tiling the floor.
Electrics
Plastering & Finishing
All calculators are free to use with no signup required. Bathroom electrical work must comply with Part P of the Building Regulations and should be carried out by a qualified electrician. Gas work requires a Gas Safe registered engineer.