Kitchen & Bathroom Calculators
Kitchen units, worktops, bathroom spacing, en-suite sizing and extraction calculators for UK fitting projects.
Bathroom Suite Spacing Calculator
Check bathroom suite clearances between fittings and walls per UK building regulations.
Bathroom Tiling Cost Calculator
Calculate bathroom tiling costs for walls and floors including tiles, adhesive, grout and labour.
En-Suite Minimum Size Calculator
Check whether your room dimensions can fit an en-suite with desired fittings and clearances.
Kitchen Extraction Calculator
Calculate kitchen extraction rates for cooker hoods and mechanical ventilation per Part F.
Kitchen Plinth Calculator
Calculate kitchen plinth lengths, clips and end caps for base unit runs.
Kitchen Unit Calculator
Calculate base units, wall units, tall units, filler panels, plinth, cornice and hardware for your kitchen.
Kitchen Worktop Calculator
Calculate worktop lengths, joints, sink and hob cut-outs, edging strips and upstands for any kitchen.
Vanity Unit Sizing Calculator
Calculate vanity unit sizes with basin clearance, plumbing offsets and storage capacity.
8 free calculators in Kitchen & Bathroom
Kitchen and Bathroom Fitting in the UK
Kitchen and bathroom fitting are among the most popular home improvement projects in the UK, and getting the dimensions and material quantities right is critical. Our calculators cover kitchen unit layouts, worktop measurements, bathroom clearances, extraction rates and tiling costs — everything a fitter needs to plan a job accurately before ordering materials.
Standard UK kitchen base units are 870mm high (with 150mm plinth) and 600mm deep. Wall units sit at 450–500mm above the worktop, which is typically 40mm thick at 600mm or 620mm depth. Our kitchen unit calculator works out base, wall, and tall unit quantities, plus filler panels, plinths, cornice, and hardware from your room dimensions.
UK Building Regulations require mechanical extraction in kitchens and bathrooms. Part F specifies a minimum 60 litres/second for a cooker hood or 30 l/s for a general kitchen extract fan. Bathrooms require 15 l/s intermittent or 8 l/s continuous extraction. The kitchen extraction calculator helps select the correct fan rating based on room volume and Building Regulations requirements.
Bathroom layouts must provide adequate clearances between fittings. A standard bath needs 700mm standing space alongside it, a WC requires 600mm in front and 200mm to one side, and a basin needs 600mm standing space. En-suite bathrooms with a shower, WC and basin require a minimum floor area of approximately 1.6m × 2.1m to meet these clearances comfortably.