Bathroom Renovation Cost Calculator
Estimate UK bathroom renovation costs by size, finish quality, location, extras, and contingency
12 free calculators
UK construction calculators for materials and building projects
Estimate bricks, timber, insulation, plasterboard, drainage, shed bases, loft suitability, and renovation budgets with clear metric formulas.
Block Paving Calculator
Calculate block paving quantities, sharp sand bed volume, and waste allowance
Drainage Calculator
Estimate rainwater runoff flow rate from area, rainfall intensity, and surface type
House Extension Cost Calculator
Estimate UK house extension build cost by size, quality, location, extras, and contingency
Insulation Calculator
Calculate loft, wall, or floor insulation rolls from area, coverage, and waste allowance
Kitchen Renovation Cost Calculator
Estimate UK kitchen renovation budget by room size, quality, location, extras, and contingency
Loft Conversion Calculator
Check loft conversion suitability using headroom, roof pitch, usable width, and usable floor area
Paint Calculator
Calculate how many litres of paint you need for walls, ceilings, rooms, and single walls
Shed Base Calculator
Calculate concrete volume, bag quantities, or paving slabs for a shed base
Staircase Calculator
Calculate number of steps, rise, going, pitch, and basic UK stair compliance checks
Timber Calculator
Calculate timber for stud walls, floor joists, and roof rafters using UK metric spacing
Wallpaper Calculator
Calculate how many wallpaper rolls you need using UK standard roll sizes
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Browse Construction calculators and resources
Use these links to move quickly between the most useful calculators, topic groups, guides, and official resources for this category.
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Useful resources
- Planning Portal
UK planning and building control guidance for home building projects.
- GOV.UK building regulations approval
Official guidance on when building regulations approval may be needed.
- Health and Safety Executive construction guidance
Health and safety guidance for construction, building, and maintenance work.