All Free UK Trade Calculators
Browse all 199 free calculators across 16 categories. Every tool uses metric measurements, UK product sizes, and UK building regulations.
Calculate plaster, plasterboard, rendering materials and more for any UK project.
Plaster Coverage Calculator
Calculate how many bags of plaster you need for any wall or ceiling area.
Plasterboard Calculator
Work out how many plasterboard sheets you need for your room.
Skim Coat Calculator
Calculate multi-finish plaster needed for skim coating walls and ceilings.
Rendering Calculator
Calculate sand and cement quantities for external rendering.
Dot and Dab Calculator
Work out adhesive needed for dot and dab plasterboard fixing.
Plaster Bead Calculator
Calculate angle bead and stop bead lengths for your plastering job.
Coving Calculator
Work out coving lengths and adhesive needed for any room.
Artex Removal Cost Estimator
Estimate the cost of removing Artex from ceilings and walls.
Dry Lining Calculator
Calculate materials for dry lining walls including boards, tape and jointing compound.
Plaster Drying Time Estimator
Estimate how long plaster will take to dry based on conditions.
Ceiling Plaster Calculator
Calculate plaster bags for ceilings with adjusted coverage rates for overhead work.
Monocouche Render Calculator
Calculate K Rend, Weber or Parex monocouche render quantities.
Lime Plaster Calculator
Calculate lime plaster and lime putty quantities for period property restoration.
Bonding Coat Calculator
Calculate Thistle Bond-It or bonding coat plaster for walls and ceilings.
UK electrical calculators based on BS 7671 18th Edition wiring regulations.
Cable Sizing Calculator
Calculate the correct cable size based on BS 7671 18th Edition regulations.
Voltage Drop Calculator
Check voltage drop complies with UK wiring regulations.
Maximum Demand Calculator
Calculate maximum electrical demand for domestic installations.
Circuit Breaker Sizing Calculator
Determine the correct MCB rating for your circuit.
Socket Spacing Calculator
Plan socket layouts with Part P guidance on spacing and positioning.
Lighting Layout Calculator
Calculate lighting requirements based on lux levels for each room type.
Cable Length Calculator
Estimate total cable length needed from your floor plan dimensions.
RCD Selection Guide
Determine the correct RCD type and rating for your circuit.
Electrical Load Calculator
Calculate the total electrical load for a domestic property.
EV Charger Cable Sizing Calculator
Size cables correctly for electric vehicle charger installations.
Consumer Unit Sizing Calculator
Calculate how many ways your consumer unit needs for your property.
House Rewiring Calculator
Estimate circuits, cable lengths and consumer unit size for a house rewire.
Smoke Alarm Spacing Calculator
Calculate smoke and heat alarm positions to comply with BS 5839-6.
Pipe sizing, boiler calculations, radiator and heating system tools for UK properties.
Pipe Sizing Calculator
Calculate the correct pipe diameter for your plumbing installation.
Boiler Size Calculator
Determine the right boiler kW output for your UK property.
Hot Water Cylinder Sizing Calculator
Size your hot water cylinder based on household demand.
Radiator Sizing Calculator
Calculate the BTU output needed for each room.
Central Heating System Volume Calculator
Calculate total water volume in your central heating system.
Inhibitor Dosing Calculator
Work out the correct amount of inhibitor for your heating system.
Towel Rail Sizing Calculator
Calculate the right towel rail size for your bathroom.
Underfloor Heating Pipe Calculator
Calculate pipe lengths and spacing for underfloor heating systems.
Expansion Vessel Sizing Calculator
Size the expansion vessel for your sealed heating system.
Heat Pump Sizing Calculator
Calculate the heat pump capacity needed for your property.
Water Pressure Calculator
Calculate water pressure and check if it's adequate for your fixtures.
Waste Pipe Sizing Calculator
Size waste pipes and calculate fall for sinks, baths and toilets per Part H.
Flue Liner Calculator
Calculate flue liner size and length for wood burners and stoves per Document J.
Gas Pipe Sizing Calculator
Calculate gas pipe diameter based on appliance load and pipe run length.
Oil Tank Sizing Calculator
Size an oil storage tank based on annual consumption and delivery schedule.
Calculate tiles, felt, battens, guttering and all roofing materials for UK roof types.
Roof Tile Calculator
Calculate how many roof tiles you need per m² for your roof.
Ridge Tile Calculator
Work out ridge tile quantities and mortar needed.
Felt and Batten Calculator
Calculate roofing felt and batten quantities for your roof.
Soffit and Fascia Calculator
Work out soffit board and fascia lengths needed.
Gutter Sizing Calculator
Calculate gutter size and downpipe requirements for your roof area.
Lead Flashing Calculator
Calculate lead flashing quantities for valleys, abutments and chimneys.
Roof Area Calculator
Calculate actual roof area from plan dimensions and pitch angle.
Roof Pitch Calculator
Calculate roof pitch angle from rise and run measurements.
Roof Truss Calculator
Estimate truss quantities and spacing for your roof span.
Flat Roof Membrane Calculator
Calculate membrane and insulation needed for flat roof coverings.
Roof Ventilation Calculator
Calculate roof ventilation to comply with UK Building Regulations and BS 5250.
Roof Window Sizing Calculator
Calculate Velux or roof window size and quantity for Part L daylight compliance.
Screed, tiles, laminate, carpet and all flooring material calculators.
Screed Calculator
Calculate screed volume and sand/cement quantities for floor screeding.
Self-Levelling Compound Calculator
Work out how many bags of self-levelling compound you need.
Floor Tile Calculator
Calculate tiles, adhesive and grout needed for floor tiling.
Laminate Flooring Calculator
Work out how many packs of laminate or engineered flooring you need.
Carpet Calculator
Calculate carpet area, underlay and gripper rod quantities.
Underfloor Heating Coverage Calculator
Calculate UFH mat or cable coverage for your floor area.
Floor Joist Calculator
Size floor joists and calculate spacing based on span and load.
Vinyl Flooring Calculator
Calculate vinyl flooring quantities including wastage allowance.
Floor Levelling Calculator
Estimate compound needed to level an uneven floor.
Skirting Board Calculator
Calculate skirting board lengths and mitre cuts needed for any room.
Topsoil, gravel, drainage, fencing, decking and garden material calculators.
Topsoil Calculator
Calculate how many tonnes or bulk bags of topsoil you need.
Gravel Calculator
Work out gravel or aggregate quantities in tonnes and bulk bags.
Type 1 Sub-Base Calculator
Calculate Type 1 MOT sub-base quantities for driveways and paths.
Soakaway Sizing Calculator
Size a soakaway to UK BRE DG 365 standards for your roof area.
Fence Post Spacing Calculator
Calculate fence post quantities and optimal spacing.
Decking Calculator
Calculate decking boards, joists, fixings and all materials needed.
Paving Slab Calculator
Work out how many paving slabs and how much sand/cement you need.
Raised Bed Soil Calculator
Calculate soil volume needed to fill raised garden beds.
Drainage Fall Calculator
Calculate the correct gradient and fall for drainage pipes.
French Drain Calculator
Calculate gravel, membrane and pipe needed for a French drain.
Retaining Wall Calculator
Estimate blocks or sleepers needed for a retaining wall.
Turf Calculator
Calculate turf rolls or grass seed needed for your lawn area.
Artificial Grass Calculator
Calculate artificial grass, sub-base, membrane and fixings for your garden.
Block Paving Calculator
Calculate block paving quantities for driveways and patios with pattern wastage.
Aggregate Calculator
Calculate gravel, sand and aggregate in tonnes and bulk bags for any project.
Shed Base Calculator
Calculate materials for a shed base — concrete, paving slabs or gravel pad.
Pergola Calculator
Calculate timber, fixings and concrete for a garden pergola.
Gabion Wall Calculator
Calculate gabion baskets, fill stone and membrane for a gabion wall.
Rainwater Harvesting Calculator
Size a rainwater harvesting tank based on roof area and rainfall.
Driveway Calculator
Calculate materials for gravel, block paving, tarmac, resin or concrete driveways.
Weed Membrane Calculator
Calculate weed membrane area, overlap and fixing pins for any ground cover project.
Garden Edging Calculator
Calculate edging strips, stakes and fixings for lawns, borders and paths.
Bark Mulch Calculator
Calculate bark mulch volume in bulk bags and litres for garden beds.
Lawn Feed Calculator
Calculate lawn feed, weed killer and seed quantities by lawn area.
Pond Liner Calculator
Calculate pond liner size with overlap allowance for any pond shape.
Pond Volume Calculator
Calculate pond water volume in litres for pumps, filters and treatments.
Concrete, blocks, bricks, mortar and structural material calculators.
Concrete Volume Calculator
Calculate concrete volume in m³ for foundations, slabs and paths.
Concrete Mix Calculator
Work out cement, sand and aggregate ratios for different concrete mixes.
Block Calculator
Calculate how many concrete blocks you need per m² of wall.
Brick Calculator
Work out how many bricks you need for walls, piers and features.
Mortar Calculator
Calculate sand and cement quantities for bricklaying and blockwork mortar.
Foundation Calculator
Estimate foundation depth, width and concrete volume needed.
Lintel Sizing Calculator
Determine the correct lintel size for your opening width and load.
Padstone Sizing Calculator
Calculate padstone dimensions for steel beam bearings.
Rebar Calculator
Calculate reinforcement bar quantities and spacing for concrete.
Concrete Drying Time Estimator
Estimate concrete curing and drying times based on conditions.
Wall Ties Calculator
Calculate cavity wall tie quantities per PD 6697 for new build and remedial work.
DPC Calculator
Calculate damp proof course lengths and rolls for walls and cavity trays.
Timber Span Calculator
Find the right timber size for floor joists, ceiling joists and beams by span.
Cladding Calculator
Calculate cladding boards, battens, membrane and fixings for external walls.
Repointing Calculator
Calculate mortar needed for repointing brickwork.
Acrow Prop Spacing Calculator
Calculate Acrow prop quantities and spacing for temporary structural support.
Paint coverage, wallpaper, primer and decorating material calculators.
Paint Coverage Calculator
Calculate how many litres of paint you need for walls and ceilings.
Wallpaper Calculator
Work out how many rolls of wallpaper you need for any room.
Primer Coverage Calculator
Calculate primer quantities for walls, wood and metalwork.
Wood Stain Calculator
Calculate wood stain or varnish needed for decking, fences and furniture.
Masonry Paint Calculator
Calculate exterior masonry paint for outside walls.
Ceiling Paint Calculator
Calculate paint needed specifically for ceilings with correct coverage rates.
Radiator Paint Calculator
Calculate specialist radiator paint for single panel, double panel and column radiators.
Floor Paint Calculator
Calculate floor paint for garages, workshops and interior floors.
Intumescent Paint Calculator
Calculate fire protection paint for steelwork and timber per Part B.
Anti-Mould Paint Calculator
Calculate anti-mould and anti-condensation paint for bathrooms, kitchens and damp areas.
U-value, heat loss, insulation thickness and energy efficiency calculators.
U-Value Calculator
Calculate the U-value of wall, floor and roof constructions.
Insulation Thickness Calculator
Determine the insulation thickness needed to meet UK Building Regulations.
Heat Loss Calculator
Calculate room-by-room heat loss for heating system sizing.
Cavity Wall Insulation Calculator
Estimate cavity wall insulation quantities and potential savings.
Loft Insulation Calculator
Calculate loft insulation rolls needed for your loft area.
EPC Rating Estimator
Estimate your property's Energy Performance Certificate rating.
Draught-Proofing Calculator
Calculate draught-proofing materials for doors and windows.
Solar Panel Savings Estimator
Estimate solar panel energy generation and cost savings for UK homes.
Floor Insulation Calculator
Calculate floor insulation thickness and quantities to meet Building Regs Part L.
Pipe Insulation Calculator
Calculate pipe insulation lengths and thickness per BS 5422 standards.
Sound Insulation Calculator
Calculate acoustic insulation and resilient bars for Part E compliance.
External Wall Insulation Calculator
Calculate EWI boards, adhesive, mesh and render for external wall insulation.
Window Energy Savings Calculator
Calculate energy and cost savings from upgrading windows.
Solar Battery Storage Calculator
Size a solar battery system based on daily usage, panel output and tariff.
EV Charging Time Calculator
Calculate electric vehicle charging time from battery size and charger power.
Wall tiles, adhesive, grout, shower trays and bathroom calculators.
Wall Tile Calculator
Calculate wall tiles, adhesive and grout for bathrooms and kitchens.
Tile Adhesive Calculator
Work out how much tile adhesive you need for floors and walls.
Grout Calculator
Calculate grout quantities based on tile size and joint width.
Shower Tray Fall Calculator
Calculate the correct fall gradient for a wet room or shower tray.
Bathroom Extraction Rate Calculator
Calculate the required extraction rate for bathroom ventilation.
Wet Room Tanking Calculator
Calculate tanking kit materials for wet room waterproofing.
Underfloor Heating Mat Calculator
Calculate electric UFH mat size, wattage and thermostat for tiled floors.
Ventilation Rate Calculator
Calculate extract ventilation rates per Approved Document F for any room.
Splashback Tile Calculator
Calculate tiles, adhesive and trims for kitchen and bathroom splashbacks.
Fence panels, posts, concrete, gravel boards and boundary calculators.
Fence Panel Calculator
Calculate fence panels, posts and fittings for your boundary.
Post and Rail Fence Calculator
Work out posts, rails and fixings for post and rail fencing.
Concrete for Fence Posts Calculator
Calculate postcrete or concrete needed to set fence posts.
Gravel Board Calculator
Calculate gravel boards and clips needed for your fence run.
Trellis Calculator
Work out trellis panels and fixings needed for your garden.
Close Board Fencing Calculator
Calculate featheredge boards, posts, arris rails and fixings for close board fencing.
Garden Wall Calculator
Calculate blocks, bricks, mortar, foundations and coping for a freestanding garden wall.
Area, volume, unit converters and general-purpose construction tools.
Area Calculator
Calculate areas for rectangles, triangles, circles and irregular shapes.
Volume Calculator
Calculate volumes for cubes, cylinders, cones and irregular shapes.
Metres to Feet Converter
Convert between metric and imperial measurements.
Kg to Bags Converter
Convert bulk weights to bag quantities for common building materials.
Cubic Metres to Tonnes Converter
Convert volume to weight for aggregates, sand, soil and more.
Skip Size Guide
Find the right skip size for your project with volume and cost estimates.
Van Payload Calculator
Check if your van can carry the weight of your materials.
Scaffolding Calculator
Estimate scaffolding requirements and hire costs for your project.
Suspended Ceiling Calculator
Calculate ceiling tiles, grid, wall angle and hangers for a suspended ceiling.
Garden Room Calculator
Estimate materials for a self-build garden room or home office.
Ramp Calculator
Calculate ramp length, gradient and handrails for Part M wheelchair access.
Worktop Calculator
Calculate kitchen worktop lengths, joints and edging strips.
Concrete Mixer Loads Converter
Convert concrete volume in m³ to mixer loads for belle and barrow mixing.
Brick to Block Converter
Convert between brick and block quantities for equivalent wall areas.
Tile to Boxes Converter
Convert tile m² coverage to boxes needed for any tile size and box quantity.
VAT Reclaim Calculator
Calculate VAT reclaim on new build self-builds using the DIY VAT431 scheme.
CIS Tax Deduction Calculator
Calculate Construction Industry Scheme tax deductions for subcontractors.
Planning Application Fee Calculator
Calculate UK planning application fees for householder and other applications.
Fire Escape Route Calculator
Calculate maximum travel distances and escape route widths per Approved Document B.
Minimum Room Size Calculator
Check room sizes against NDSS and Housing Act minimum space standards.
Natural Light Calculator
Calculate window-to-floor area ratio for daylight compliance.
Rubble Removal Calculator
Estimate rubble weight and skip size needed for demolition waste.
Waste Tonnage Calculator
Calculate waste tonnage by material type for skip hire and disposal.
Staircase, stud wall, door lining and balustrade calculators for UK building projects.
Staircase Calculator
Calculate stair dimensions compliant with UK Building Regulations Part K.
Stud Wall Calculator
Calculate studs, plasterboard and fixings for partition walls.
Door Lining & Architrave Calculator
Calculate door lining sets and architrave for multiple doors.
Spindle Spacing Calculator
Calculate baluster spacing compliant with 100mm sphere rule.
Shelving Calculator
Calculate shelf lengths, brackets, fixings and load capacity for wall shelving.
Plywood & OSB Sheet Calculator
Calculate plywood or OSB sheets needed with cutting optimisation.
Dado Rail Calculator
Calculate dado rail lengths, mitre joints and fixings for any room.
Picture Rail Calculator
Calculate picture rail lengths, mitre joints and fixings for any room.
Tongue and Groove Calculator
Calculate tongue and groove boards for wall cladding, ceilings and floors.
Window Board Calculator
Calculate window board sizes, lengths and fixings for window reveals.
Drainage, sewage, attenuation and water management calculators for UK Building Regulations.
Manhole Calculator
Calculate manhole rings, benching, cover and frame for inspection chambers.
Land Drain Calculator
Calculate perforated pipe, gravel and geotextile for land drainage systems.
ACO Drain Calculator
Calculate channel drain lengths, end caps, outlets and gratings.
Sewage Treatment Plant Calculator
Size a sewage treatment plant by population equivalent per Building Regulations.
Septic Tank Sizing Calculator
Calculate septic tank capacity based on occupants and General Binding Rules.
Storm Water Attenuation Calculator
Size attenuation tanks and crates for storm water storage per Part H.
Percolation Test Calculator
Calculate percolation rate (Vp) from field test data for soakaway and drainage field design.
Loft boarding, conversion, ventilation and attic calculators for UK properties.
Loft Boarding Calculator
Calculate loft boards, battens and fixings for loft storage flooring.
Loft Ladder Sizing Calculator
Calculate loft ladder length and opening size for your floor-to-floor height.
Loft Conversion Head Height Calculator
Check if your loft has enough head height for a loft conversion.
Loft Load Capacity Calculator
Calculate safe storage load for loft joists based on size and spacing.
Loft Ventilation Calculator
Calculate eaves and ridge ventilation area to comply with BS 5250.
Dormer Sizing Calculator
Calculate dormer window dimensions, cheek cladding and structural opening size.
Damp proofing, timber treatment, mould removal and condensation calculators.
Timber Treatment Calculator
Calculate timber preservative and treatment quantities by surface area.
Woodworm Treatment Calculator
Calculate woodworm treatment spray and paste for infested timber.
Rising Damp Treatment Calculator
Calculate DPC injection cream, drill spacing and replastering for rising damp.
Condensation Risk Calculator
Calculate dew point and interstitial condensation risk for walls and roofs.
Mould Treatment Calculator
Calculate mould wash, steriliser and anti-mould paint for affected areas.
Dry Rot Treatment Calculator
Calculate dry rot treatment including cut-back, fungicide and replacement timber.
Why Use TradeCalcs?
Every calculator on this page is completely free, requires no signup, and works on any device. All tools use UK metric measurements, standard UK product sizes, and reference current UK building regulations where applicable.
Whether you're pricing a job, ordering materials, or checking compliance, TradeCalcs helps you get accurate estimates quickly. Results include wastage allowances and let you input your own material prices for cost estimates tailored to your suppliers.