Browse 236 UK construction calculators

Cement Bags Calculator

Converts concrete volume to number of bags (40lb, 60lb, 80lb / 20kg, 25kg, 40kg)

Concrete Column Calculator

Calculates concrete for round and square columns by height and diameter

Concrete Footing Calculator

Estimates concrete for strip, pad, and trench footings

Concrete Mix Ratio Calculator

Calculates sand, cement, and aggregate quantities for standard and custom mix ratios

Concrete Pump Line Calculator

Estimates concrete pump pipe length and pressure losses for a pour

Concrete Slab Calculator

Calculates concrete volume for slabs, paths, and driveways

Concrete Slump Calculator

Estimates slump value from water content and mix design inputs

Concrete Steps Calculator

Estimates concrete volume for outdoor steps

Concrete Wall Calculator

Calculates concrete volume and formwork area for poured concrete walls

Floor Screed Calculator

Calculates volume and bags of floor screed by area and depth

Mortar Calculator

Estimates sand and cement for mortar mixes

Post Hole Concrete Calculator

Calculates bags of concrete for setting fence and deck posts

Ready-Mix Truck Volume Calculator

Calculates how many ready-mix trucks are needed for a pour volume

Rebar / Reinforcement Calculator

Calculates rebar length, weight, and spacing for slabs, walls, and footings

Water-Cement Ratio Calculator

Calculates water-cement ratio for a concrete mix and estimates strength

Flat Roof Material Calculator

Calculates membrane area (EPDM, TPO, modified bitumen) for flat roofs

Gutter / Guttering Calculator

Estimates metres or feet of guttering, downspouts, and fittings

Hip Roof Area Calculator

Calculates hip roof area and material quantity from plan dimensions

Lead Flashing Calculator

Estimates lead flashing length and weight for chimneys and abutments

Metal Roofing Calculator

Estimates metal roof panels, screws, and trim for standing seam and corrugated

Ridge Cap / Ridge Tile Calculator

Calculates ridge tiles, caps, or shingles for roof ridge and hips

Roof Area Calculator

Calculates actual roof surface area from plan footprint and pitch

Roof Batten / Furring Strip Calculator

Calculates linear metres of battens from tile gauge and pitch

Roof Insulation Calculator

Estimates rolls or boards of roof insulation for pitched and flat roofs

Roof Pitch Calculator

Converts pitch between degrees, ratio, and percentage

Roof Tile / Shingle Calculator

Estimates roof tiles or shingles by pitch and area

Roof Ventilation Calculator

Calculates intake and exhaust vent area for balanced roof ventilation

Roofing Felt / Underlayment Calculator

Estimates rolls of roofing felt or synthetic underlayment with overlap

Skylight / Rooflight Opening Calculator

Calculates structural opening size and flashing for rooflights

Baseboard / Skirting Board Calculator

Calculates linear metres or feet of baseboard for a room perimeter

Deck Framing Calculator

Estimates joists, beams, posts, and hardware for a deck frame

Decking Board Calculator

Estimates number of deck boards by area, width, and gap spacing

Floor Joist Calculator

Estimates joist count by span, on-centre spacing, and room width

I-Joist Calculator

Calculates engineered I-joist depth and spacing for floor systems

Timber Calculator

Calculates board feet or linear metres of timber by section and count

Nail / Screw Quantity Calculator

Estimates number of nails or screws by timber dimensions and spacing

Rafter Length Calculator

Calculates rafter length from ridge to eaves using span, pitch, and overhang

Shed Timber Calculator

Estimates all timber to frame a garden shed by dimensions

Wood Shrinkage Calculator

Estimates dimensional change in timber from moisture content change

Brick Arch Calculator

Estimates number of bricks for soldier, stretcher, and gauged arches

Brick Calculator

Estimates bricks and mortar for walls

Cavity Tie Spacing Calculator

Calculates number and spacing of wall ties for cavity walls

Concrete Block / CMU Calculator

Calculates concrete blocks and mortar for single and double skin walls

Damp Proof Course Calculator

Calculates metres or feet of DPC for walls

Lintel Bearing Length Calculator

Calculates minimum lintel bearing length by span and wall type

Net Wall Area Calculator

Calculates gross and net wall area deducting windows and doors

Plaster / Render Calculator

Estimates bags of plaster or render by wall area and coat thickness

Quoin / Corner Brick Calculator

Calculates extra bricks needed for quoins and corner details

Repointing Mortar Calculator

Calculates mortar for repointing brick and stone joints by area

Retaining Wall Calculator

Estimates blocks, concrete, and drainage for retaining walls

Stone Wall Calculator

Estimates tonnes or cubic yards of natural stone for walls

Asphalt / Tarmac Calculator

Estimates tonnes of asphalt or tarmac for driveways

Block Paving / Brick Paver Calculator

Calculates paving blocks, sand, and edging for driveways

Concrete Driveway Calculator

Calculates concrete volume and cost for a poured concrete driveway

Driveway Cost Calculator

Estimates driveway cost by surface type and area

Edging / Border Strip Calculator

Estimates linear metres of edging for drives, paths, and borders

Permeable Paving Calculator

Estimates permeable block paving and sub-base for SuDS driveways

Resin Bound Surface Calculator

Calculates kg of resin and aggregate for resin-bound surfaces

Stepping Stone Calculator

Calculates stones and spacing for a stepping stone path

Bamboo Floor Calculator

Estimates boxes of bamboo flooring by room area with waste factor

Carpet Calculator

Estimates carpet area with seam allowance and roll widths

Cork Flooring Calculator

Calculates packs of cork flooring tiles or planks with waste

Epoxy Floor Coating Calculator

Estimates litres or gallons of epoxy floor coating by area and coats

Floor Tile Spacer Calculator

Calculates number of tile spacers needed by tile count and joint type

Flooring Calculator

Universal floor area estimator

Grout Calculator

Estimates grout by tile size, joint width, and floor area

Hardwood Floor Calculator

Estimates boards or bundles of solid and engineered hardwood

Herringbone Floor Calculator

Estimates extra tiles needed for herringbone and chevron laying patterns

Laminate Flooring Calculator

Calculates packs and planks of laminate with waste and offcuts

Self-Levelling Compound Calculator

Calculates bags of floor levelling compound by area and pour depth

Tile Adhesive Calculator

Calculates tile adhesive coverage for floors and walls

Tile Calculator

Calculates tile quantity with wastage, boxes, and diagonal option

Underlay / Underlayment Calculator

Estimates rolls of underlay for carpet, laminate, and wood floors

Vinyl / LVT Flooring Calculator

Calculates sheet vinyl and LVT quantity including roll widths

Attic / Loft Insulation Calculator

Calculates rolls of batt or blown insulation

Draught Proofing Calculator

Estimates draught seal strip lengths for doors and windows

Floor Insulation Calculator

Calculates boards or batts of floor insulation

Spray Foam Insulation Calculator

Estimates board-feet or litres of spray foam for insulation

Triple Glazing Savings Calculator

Estimates energy saving and payback from double to triple glazing upgrade

Wall Cavity Insulation Calculator

Estimates batts or boards of wall insulation for new build and retrofit

Deck Stain / Sealer Calculator

Calculates gallons or litres of deck stain or sealer

Exterior Paint Calculator

Calculates litres or gallons of exterior paint for siding and masonry

Fence Paint / Stain Calculator

Estimates paint or stain by panel count and size

Paint Thinning Ratio Calculator

Calculates correct thinner quantity for spray and brush application

Paint Weight Calculator

Converts litres of paint to weight in kg or lbs by paint type

Painting Cost Calculator

Estimates total paint cost including materials and labour

Primer / Undercoat Calculator

Estimates litres or gallons of primer and undercoat for any surface

Spray Paint Coverage Calculator

Estimates number of spray cans or litres of spray paint by area

Wallpaper Paste Calculator

Calculates sachets or litres of wallpaper paste by roll count

Pipe Insulation / Lagging Calculator

Calculates metres or feet of pipe insulation by diameter

Pipe Length Calculator

Calculates total metres or feet of pipe for plumbing circuits

Compaction Factor Calculator

Adjusts bulk material volume for compaction factor after laying

Cut and Fill Calculator

Estimates cut and fill volumes for site levelling and earthworks

Excavation Volume Calculator

Estimates cubic metres or yards of soil to excavate and remove

French Drain / Trench Drain Calculator

Estimates pipe length, gravel, and geotextile for French drains

Land Drain Calculator

Estimates perforated pipe length and gravel for land drainage

Pipe Fall / Gradient Calculator

Calculates drainage pipe fall per metre or foot

Skip / Dumpster Size Calculator

Recommends skip or dumpster size from waste volume and type

Soakaway / Dry Well Calculator

Calculates soakaway pit size from catchment area and soil type

Soil Volume to Weight Calculator

Converts soil volume to tonnes or pounds by soil type and density

Sub-Base / Hardcore Calculator

Calculates tonnes or tons of crushed stone sub-base for driveways

Acres to Square Metres

Converts acres to m², hectares, and square feet and back

Celsius to Fahrenheit Calculator

Converts between Celsius and Fahrenheit for concrete and drying conditions

Cubic Metres to Cubic Yards

Converts m³ to cubic yards and back for concrete and aggregate

Cubic Metres to Tonnes

Converts m³ to tonnes for concrete, sand, and gravel by density

Hectares to Acres Calculator

Converts hectares to acres and square metres and back

Kg / Lbs to Bags Calculator

Converts weight to number of bags for common bag sizes

kW to BTU Calculator

Converts kilowatts to BTU per hour for heating and cooling sizing

Linear Metres to Square Metres

Converts linear metres to m² by material width

Litres to Gallons Calculator

Converts litres to UK and US gallons for tanks and plumbing

Metres to Feet and Inches

Converts metres to feet and inches and back

Room Area Calculator

Calculates floor area for rectangular, L-shaped, and irregular rooms

Slope / Gradient Calculator

Converts between percentage gradient, degrees, and ratio

Square Metres to Square Feet

Converts m² to ft² and ft² to m² instantly

Volume Calculator

Calculates volume of rectangular, cylindrical, and trapezoidal shapes

Waste / Overage Factor Calculator

Adds correct waste percentage to any material quantity

Architect Fee Calculator

Estimates architect percentage fee by project value and scope

Ceiling Height Calculator

Checks ceiling height compliance and calculates room volume

Floor Area Ratio / Plot Ratio Calculator

Calculates FAR and site coverage percentage for planning

Trade Labour Cost Calculator

Estimates daily and project labour cost by trade type

Material Cost Calculator

Calculates total material cost from quantity and unit price

Build Project Budget Calculator

Estimates total project budget from materials, labour, and contingency

Project Contingency Calculator

Recommends contingency budget percentage by project type and risk

Build Project Timeline Calculator

Estimates project duration from trade sequence and working days

Room Size Calculator

Calculates room dimensions and checks against code minimums

Structural Engineer Cost Calculator

Estimates structural engineer fee for residential projects

Bricklaying Time Calculator

Estimates days to lay a brick wall from m² per day rates

Concrete Curing Time Calculator

Estimates curing and setting time by mix and temperature

Excavation Time Calculator

Estimates hours to excavate by hand or machine

Flooring Installation Time Calculator

Estimates days to install flooring by type and area

Groundwork Time Calculator

Estimates days for excavation, drainage, and foundations by scope

Paint / Plaster Drying Time Calculator

Estimates drying and recoat time for paint and plaster

Painting Time Calculator

Estimates days to paint a property by area and coat count

Plastering / Drywalling Time Calculator

Estimates days to plaster or plasterboard walls and ceilings

Roofing Time Calculator

Estimates days to reroof a property by area and tile type

Tiling Time Calculator

Estimates hours or days to tile floors and walls

Kitchen Cabinet Count Calculator

Estimates number of base and wall units for a kitchen by wall lengths

Kitchen Extractor / Hood Size Calculator

Recommends extractor fan size and extraction rate for a hob

Kitchen Grout Calculator

Estimates grout quantity for kitchen wall and floor tiles

Kitchen Renovation Cost Calculator

Estimates kitchen remodel cost including cabinets, worktops, and appliances

Kitchen Splashback Area Calculator

Calculates m² of splashback tiles or panels behind a hob

Kitchen Worktop Calculator

Calculates linear metres of worktop needed for a kitchen layout

Bath Volume / Litres Calculator

Calculates bath volume in litres or gallons from bath dimensions

Bathroom Renovation Cost Calculator

Estimates total bathroom remodel cost including fixtures and fitting

Bathroom Tile Calculator

Estimates wall and floor tiles for a full bathroom refit

Shower Tray Size Calculator

Recommends shower tray size and shape for a given bathroom layout

Towel Rail BTU Calculator

Calculates BTU output of a towel rail needed to heat a bathroom

Waterproofing Membrane Calculator

Calculates m² of tanking membrane for wet rooms and bathrooms

WC Clearance Checker

Checks toilet clearance dimensions against accessibility standards

Wet Room Falls Calculator

Calculates floor fall gradient for wet room drainage compliance

Acoustic Ceiling Tile Calculator

Estimates acoustic ceiling tiles for a suspended grid ceiling

Ceiling Joist Calculator

Calculates number of ceiling joists by room span and spacing

Ceiling Paint Calculator

Estimates litres or gallons of ceiling paint by coats

Coving / Crown Molding Calculator

Estimates metres or feet of coving or crown molding for a room

Dado Rail Calculator

Calculates linear metres or feet of dado rail for a room

Plasterboard Calculator

Calculates sheets for walls and ceilings

Joint Compound / Drywall Mud Calculator

Estimates buckets of joint compound for taping, floating, and finishing

Drywall Screw Calculator

Estimates number of plasterboard screws by sheet count and stud spacing

Drywall Tape Calculator

Calculates rolls of plasterboard tape by total linear feet of joints

Paint Calculator

Calculates litres or gallons of paint for walls, ceilings, and trim

Stud Wall / Partition Wall Calculator

Calculates studs, plates, and noggins for framed walls

Wall Cladding Calculator

Calculates boards, panels, or sheets of wall cladding by area

Wall Insulation Calculator

Estimates batts, rolls, or boards of wall cavity and stud insulation

Wallpaper Roll Calculator

Estimates rolls with straight match and half-drop pattern repeat

Curtain / Blind Size Calculator

Calculates curtain fabric or blind dimensions from window size

Door Rough Opening Calculator

Calculates rough opening dimensions for door installation

Glass Weight Calculator

Estimates weight of a glass pane by dimensions and glass type

Glazing Panel Calculator

Calculates glazing panel area and weight for conservatories

Sliding / Bifold Door Calculator

Estimates panel count and structural header for wide openings

Window Area Calculator

Calculates total window area for heat loss and glazing sizing

Window Energy Rating Calculator

Estimates window energy rating (A to G) from U-value and solar gain

Window Replacement Cost Calculator

Estimates cost to replace windows by count, size, and glazing type

Window Sill Calculator

Calculates linear metres or feet of window sill board

Room Volume Calculator

Calculates room volume in m³ or cubic feet for HVAC and ventilation

Artificial Grass Calculator

Estimates m² or ft² of artificial grass with waste and joining strips

Compost Calculator

Calculates bags or cubic metres of compost for borders and veg patches

Drip Irrigation Calculator

Estimates drip emitter count, pipe length, and flow rate for irrigation

Fence Calculator

Estimates panels, posts, rails, and concrete for fencing by length

Grass Seed Calculator

Estimates kg or lbs of grass seed for new lawns and overseeding

Gravel / Aggregate Calculator

Estimates tonnes or tons of gravel, crushed stone, or pea gravel

Greenhouse Size Calculator

Estimates greenhouse dimensions and glazing area for a plant count

Irrigation Pipe Sizing Calculator

Estimates pipe diameter for irrigation systems from flow rate and length

Mulch Calculator

Calculates cubic yards or cubic metres of mulch, bark, or wood chip

Paver / Paving Slab Calculator

Calculates number of pavers or slabs for patios and walkways

Pond Liner Calculator

Estimates pond liner size from pond dimensions

Pond Volume Calculator

Calculates pond volume in litres or gallons for pumps and stocking

Raised Bed / Garden Box Soil Calculator

Estimates litres, gallons, or bags of soil for raised beds

Rockery Stone Calculator

Calculates number and weight of rockery stones by project size

Sand Calculator

Estimates tonnes, tons, or bags of sand for construction and landscaping

Sleeper / Railroad Tie Calculator

Calculates sleepers for raised beds, retaining walls, and garden steps

Sprinkler Coverage Calculator

Calculates sprinkler head count and spacing for lawn irrigation

Topsoil Calculator

Calculates cubic yards or cubic metres of topsoil by area and depth

Turf / Sod Calculator

Calculates rolls or pallets of turf or sod by lawn area

Water Butt / Rain Barrel Size Calculator

Recommends water storage tank size from roof area and rainfall

Angle Iron Weight Calculator

Calculates weight of steel angle iron by leg size and length

Hollow Section Weight Calculator

Calculates weight of RHS, SHS, and CHS steel hollow sections

Metal Stud Wall Calculator

Estimates metal studs, tracks, and fixings for steel partition systems

Steel I-Beam Weight Calculator

Calculates weight of universal beam (UB) and universal column (UC) sections

Steel Plate Weight Calculator

Estimates weight of flat steel plate by dimensions and thickness

Bathroom Remodel Cost Calculator

Estimates bathroom remodel cost including tiling, fixtures, and fitting

Flooring Installation Cost Calculator

Estimates material and labour cost to install any floor type

Garage Conversion Cost Calculator

Estimates cost to convert a garage to habitable space

Home Extension Cost Calculator

Estimates build cost for extensions per m² or ft²

House Painting Cost Calculator

Estimates total painting cost by area and coat count

HVAC / Boiler Replacement Cost Calculator

Estimates supply and install cost for boiler, heat pump, or furnace

Insulation Installation Cost Calculator

Estimates cost to insulate walls, attic, and floors

Kitchen Remodel Cost Calculator

Estimates kitchen remodel cost including cabinets and appliances

Loft / Attic Conversion Cost Calculator

Estimates conversion cost for dormer and room-in-roof types

New Build / Self Build Cost Calculator

Estimates construction cost per m² or ft² for a new build

Patio / Deck Cost Calculator

Estimates cost to build a patio or deck by material and area

Swimming Pool Build Cost Calculator

Estimates total cost to build a swimming pool by type and size

Rendering Cost Calculator

Estimates cost to render an exterior wall by area and render type

Roof Replacement Cost Calculator

Estimates full roof replacement cost by footprint and material

Room Renovation Cost Calculator

Estimates total cost to renovate a room including materials and labour

Area from Coordinates Calculator

Calculates land area from GPS or map coordinates using the Shoelace formula

Bearing and Distance Calculator

Calculates compass bearing and distance between two coordinates

Contour Interval Calculator

Calculates contour interval and slope percentage from map data

GPS Coordinate Converter

Converts between decimal degrees, DMS, and UTM coordinate formats

Land Area Converter

Converts between acres, hectares, m², and ft² for land measurement

Setting Out Calculator

Calculates diagonal and offset distances for setting out right angles

Carbon Footprint Renovation Calculator

Estimates carbon saved by energy efficiency renovation measures

Embodied Carbon Calculator

Estimates embodied carbon (kgCO2) for building materials by volume

Window Energy Saving Calculator

Estimates annual energy saving from glazing upgrade

Green Roof Weight Calculator

Estimates dead load of green roof substrate by depth

Rainwater Harvesting Calculator

Estimates tank size and annual saving by roof area and rainfall

Solar Panel Savings Calculator

Estimates annual savings from solar panels by system size

Wind Turbine Output Calculator

Estimates annual kWh output from a small wind turbine by location

Pool Concrete Calculator

Calculates concrete volume for gunite and shotcrete pool shells

Pool Liner Size Calculator

Estimates pool liner dimensions from pool length, width, and depth

Pool Tile Calculator

Estimates waterline tiles and field tiles for a swimming pool

Pool Volume Calculator

Calculates swimming pool volume in litres or gallons for any pool shape

Cavity Drain Membrane Calculator

Calculates area of cavity drain membrane for internal waterproofing

Damp Proof Injection Calculator

Calculates injection cream quantity for remedial DPC installations

Liquid Rubber Calculator

Estimates litres of liquid rubber waterproofing by area and coats

Tanking Slurry Calculator

Calculates bags of tanking slurry for basement and wet area waterproofing

Waterproof Membrane Calculator

Estimates m² of waterproof membrane for basements and foundations