Country, language & terminologyUnited Kingdom · English · RAMS/COSHH
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Calculators for every trade
Use Zektrx trade calculators to estimate materials, quantities, labour allowances, site checks and job planning figures before creating quotes, RAMS, purchase lists or project records.
110
Calculators
22
Trade groups
£5
Trial route
Calculator results are estimates only. Always check measurements, supplier specifications, product data, site conditions and competent advice before ordering materials or starting work.
Start with the work package.
5 tools
Electrical
Cable, voltage drop, circuit load, socket and containment planning calculators.
5 tools
Plumbing and heating
Radiator sizing, pipe volume, lagging, fitting counts and heating system volume.
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Roofing
Tiles, battens, membrane, gutters and flat roof material estimates.
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Brickwork and blockwork
Bricks, blocks, mortar, wall ties and lintel length schedules.
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Concrete
Concrete volume, postcrete bags, bagged concrete, rebar and screed estimates.
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Groundworks
Excavation, Type 1, hardcore, trench backfill and spoil skip loads.
5 tools
Steel and fabrication
Steel weight, galvanising, weld length, cut grouping and bolt counts.
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Painting and decorating
Paint, wallpaper, labour, primer and trim paint estimators.
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Flooring
Area, laminate packs, carpet roll length, levelling compound and adhesive.
5 tools
Safety exposure
HAVS, noise, manual handling, working at height and hot works readiness prompts.
Materials, allowances, site checks and planning figures.
General construction
Skip sizes, labour cost, material waste, van payload and site setup allowances.
Skip Size Estimator
Estimate skip size based on waste type, volume and job type.
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Labour Day Rate Cost Calculator
Estimate labour cost from day rate, number of workers and days.
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Material Waste Allowance Calculator
Estimate material allowance including waste percentage.
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Van Load Capacity Calculator
Estimate whether material weight is within van payload.
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Site Setup Cost Calculator
Estimate welfare, access, protection, skips, parking and prelim allowances.
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Electrical
Cable, voltage drop, circuit load, socket and containment planning calculators.
Electrical Cable Size Estimator
Estimate cable size guidance from load, length, voltage and installation method.
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Electrical Voltage Drop Calculator
Estimate voltage drop and percentage from current, cable length, conductor and cable size.
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Electrical Circuit Load Calculator
Estimate total circuit load and current from appliance wattages and voltage.
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Socket and Lighting Count Planner
Plan socket and lighting counts from rooms and allowances.
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Containment Fill Calculator
Estimate approximate tray or trunking fill from cable diameters and containment size.
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Plumbing and heating
Radiator sizing, pipe volume, lagging, fitting counts and heating system volume.
Radiator BTU Calculator
Estimate radiator BTU output from room dimensions, insulation and window type.
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Pipe Volume Calculator
Estimate water volume from pipe internal diameter and length.
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Pipe Lagging Quantity Calculator
Estimate lagging length from pipe length, diameter and fittings allowance.
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Plumbing Fitting Count Estimator
Estimate fittings from bathrooms, kitchens and radiators.
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Heating System Flush Volume Calculator
Estimate heating system volume from radiators, pipe length and system type.
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Roofing
Tiles, battens, membrane, gutters and flat roof material estimates.
Roof Tile Quantity Calculator
Estimate roof tile quantity from roof area, tile coverage and waste.
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Roof Batten Quantity Calculator
Estimate linear metres of roof batten from roof width, rafter length and gauge.
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Roof Felt Membrane Calculator
Estimate membrane rolls from roof area, roll coverage and overlap allowance.
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Gutter Length Calculator
Estimate gutter length and downpipe count from roof edges and waste allowance.
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Flat Roof Material Calculator
Estimate flat roof membrane, board, upstand and trim quantities.
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Brickwork and blockwork
Bricks, blocks, mortar, wall ties and lintel length schedules.
Brick Quantity Calculator
Estimate bricks from wall length, height, openings, bricks per m2 and waste.
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Block Quantity Calculator
Estimate blocks from wall area, block coverage, openings and waste.
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Mortar Quantity Calculator
Estimate mortar volume from brick or block count, joint thickness and mix allowance.
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Wall Tie Quantity Calculator
Estimate wall ties from wall area, spacing and openings.
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Lintel Schedule Estimator
Estimate lintel lengths from openings and bearing allowance.
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Plastering and drylining
Boards, skim, screws, metal studs and jointing compound quantities.
Plasterboard Quantity Calculator
Estimate plasterboard sheets from wall or ceiling area, board size and waste.
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Plaster Skim Quantity Calculator
Estimate skim plaster bags from area, coverage per bag and coats.
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Drywall Screw Calculator
Estimate drywall screws from board count and screws per board.
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Metal Stud Quantity Calculator
Estimate studs, tracks and boards from wall dimensions and stud spacing.
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Jointing Compound Calculator
Estimate jointing compound from board joint length and coverage.
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Joinery and carpentry
Cutting lists, decking, skirting, stair rise/run and sheet material quantities.
Timber Cutting List Calculator
Estimate stock lengths and waste from required cut lengths, quantities and stock length.
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Decking Board Calculator
Estimate decking boards from deck area, board width, gap and waste.
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Skirting Board Length Calculator
Estimate skirting length from room perimeter, door openings and waste.
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Stair Stringer Rise Run Calculator
Estimate riser count and going from total rise and preferred going.
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Sheet Material Quantity Calculator
Estimate sheet material quantities from area, sheet size and waste.
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Painting and decorating
Paint, wallpaper, labour, primer and trim paint estimators.
Paint Quantity Calculator
Estimate paint litres from wall area, coats, coverage per litre and waste.
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Wallpaper Roll Calculator
Estimate wallpaper rolls from wall dimensions, roll size and pattern repeat.
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Decorator Labour Estimator
Estimate decorator labour days from rooms, prep level and coats.
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Primer Quantity Calculator
Estimate primer litres from surface area, coverage and coats.
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Gloss Paint Trim Calculator
Estimate gloss paint for skirting, architrave and doors from trim length and coverage.
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Flooring
Area, laminate packs, carpet roll length, levelling compound and adhesive.
Flooring Area Calculator
Estimate flooring area required from room dimensions and waste.
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Laminate Pack Calculator
Estimate laminate packs from area, pack coverage and waste.
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Carpet Roll Calculator
Estimate carpet roll length from room dimensions and roll width.
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Floor Levelling Compound Calculator
Estimate levelling compound bags from area, depth and bag coverage.
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Floor Adhesive Calculator
Estimate floor adhesive tubs or bags from area and coverage.
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Tiling
Tiles, adhesive, grout, trim length and bathroom tiling cost.
Tile Quantity Calculator
Estimate tile quantity from area, tile size and waste.
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Tile Adhesive Calculator
Estimate tile adhesive bags or tubs from area and trowel coverage.
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Grout Quantity Calculator
Estimate grout quantity from tile size, joint width, joint depth and area.
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Tile Trim Length Calculator
Estimate tile trim lengths from exposed edges and waste.
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Bathroom Tiling Cost Estimator
Estimate bathroom tiling cost from wall area, floor area, material cost and labour.
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Groundworks
Excavation, Type 1, hardcore, trench backfill and spoil skip loads.
Excavation Volume Calculator
Estimate spoil volume from length, width and depth.
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Type 1 Sub Base Calculator
Estimate Type 1 sub-base tonnage from area, compacted depth and density.
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Hardcore Quantity Calculator
Estimate hardcore quantity from area, depth and density.
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Trench Backfill Calculator
Estimate trench backfill volume from trench dimensions and pipe displacement.
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Skip Loads for Spoil Calculator
Estimate skip loads from spoil volume, bulking factor and skip size.
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Concrete
Concrete volume, postcrete bags, bagged concrete, rebar and screed estimates.
Concrete Volume Calculator
Estimate concrete volume from length, width and depth.
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Postcrete Bag Calculator
Estimate postcrete bags from hole diameter, depth, post size and bag yield.
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Concrete Bag Calculator
Estimate bagged concrete from volume and bag yield.
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Rebar Length Calculator
Estimate reinforcement bar length from slab dimensions, bar spacing and laps.
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Screed Quantity Calculator
Estimate screed volume or bags from area, depth and yield.
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Drainage
Pipe fall, soakaway size, manhole rings, drain run materials and gravel surround.
Drainage Pipe Fall Calculator
Estimate pipe fall in millimetres from run length and fall ratio.
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Soakaway Size Estimator
Estimate approximate soakaway storage volume from drained area, rainfall allowance and soil note.
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Manhole Ring Depth Calculator
Estimate manhole ring build-up from invert depth, cover level and ring sizes.
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Drain Run Material Calculator
Estimate pipes and fittings from drain run length, pipe length and fittings.
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Gravel Surround Calculator
Estimate gravel surround volume from trench dimensions and pipe diameter.
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Landscaping
Turf, topsoil, fence panels, paving slabs and gravel quantities.
Turf Quantity Calculator
Estimate turf rolls or square metres from lawn area and waste.
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Topsoil Volume Calculator
Estimate topsoil volume from area and depth.
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Fence Panel Calculator
Estimate fence panels and posts from run length, panel width and post spacing.
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Paving Slab Calculator
Estimate paving slab count from area, slab size and waste.
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Gravel Area Calculator
Estimate gravel tonnes or bags from area, depth and bulk density.
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Steel and fabrication
Steel weight, galvanising, weld length, cut grouping and bolt counts.
Steel Weight Calculator
Estimate steel weight from section type, size, length and quantity.
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Galvanising Weight Cost Calculator
Estimate galvanising pickup weight and cost from steel weight and cost per kg.
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Weld Length Calculator
Estimate total weld length from joint type, length and quantity.
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Steel Cutting List Optimizer Basic
Create a basic cut grouping and waste estimate from required cut lengths and stock length.
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Bolt Quantity Calculator
Estimate bolt quantity from connection count, bolts per connection and spare percentage.
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HVAC and ventilation
Duct area, air changes, airflow, ductwork material and fan sizing.
Duct Area Calculator
Estimate duct cross-sectional area from duct dimensions or diameter.
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Air Change Rate Calculator
Estimate air changes per hour from room volume and airflow.
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Ventilation Airflow Calculator
Estimate required airflow from room size and desired air changes.
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Ductwork Material Estimator
Estimate ductwork material from duct lengths, sizes and fittings allowance.
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Extractor Fan Sizing Estimator
Estimate extractor fan airflow from room type, volume and air changes.
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Insulation
Loft rolls, wall boards, pipe insulation, thermal boards and basic U-value checks.
Loft Insulation Roll Calculator
Estimate loft insulation rolls from area, roll coverage and layers.
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Wall Insulation Board Calculator
Estimate wall insulation boards from wall area, board size and waste.
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Pipe Insulation Calculator
Estimate pipe insulation lengths from pipe length and diameter.
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Thermal Board Quantity Calculator
Estimate thermal board quantities from area, board size and waste.
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Insulation U-Value Estimator Basic
Estimate a simple R-value and U-value from layer thickness and conductivity.
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Fire stopping
Mastic cartridges, collars, fire batt, penetration registers and photo evidence checks.
Fire Stopping Mastic Calculator
Estimate fire-stopping mastic cartridges from joint length, width, depth and cartridge yield.
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Fire Collar Quantity Calculator
Estimate fire collar count from pipe penetrations and spare allowance.
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Fire Batt Board Calculator
Estimate fire batt boards from opening area, board size and waste.
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Penetration Register Counter
Estimate penetration register count and inspection workload.
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Fire Stopping Photo Evidence Checklist
Score fire-stopping photo evidence completeness before close-out.
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Glazing
Glass area and weight, survey checks, sealant, packers and panel area.
Glass Area Weight Calculator
Estimate glass area and weight from width, height, thickness and quantity.
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Window Measurement Checklist
Score window survey completeness before ordering.
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Sealant Cartridge Calculator
Estimate sealant cartridges from joint length, width, depth and cartridge yield.
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Glazing Packers Estimator
Estimate packer count from units and packers per unit.
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Mirror or Panel Area Calculator
Estimate mirror or panel area from dimensions and quantity.
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Scaffolding
Scaffold boards, lift heights, edge protection, inspection dates and access planning.
Scaffold Board Count Estimator
Estimate scaffold board count from platform length, width and board size.
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Scaffold Lift Height Planner
Estimate scaffold lift count from building height and lift spacing.
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Edge Protection Length Calculator
Estimate edge protection length from roof or perimeter lengths.
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Scaffold Inspection Reminder Calculator
Calculate upcoming scaffold inspection dates from start date and inspection interval.
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Temporary Stair Tower Access Planner
Score temporary stair tower access planning readiness.
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Solar PV
Panel counts, array kW, roof load, cable runs and simple payback.
Solar Panel Count Estimator
Estimate solar panel count from roof area, panel size and spacing allowance.
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Solar Array kW Calculator
Estimate solar array kW from panel wattage and panel count.
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Solar Roof Load Estimator
Estimate roof loading from panel weight, mounting weight and roof area.
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Solar Cable Run Estimator
Estimate solar cable length from inverter location and string runs.
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Solar Payback Basic Estimator
Estimate simple solar payback from system cost, annual generation and energy price.
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Safety exposure
HAVS, noise, manual handling, working at height and hot works readiness prompts.
HAVS Exposure Calculator
Estimate HAVS exposure points from vibration magnitude and trigger time.
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Noise Exposure Calculator
Estimate basic daily noise exposure from dB level and exposure time.
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Manual Handling Risk Score
Create a manual handling risk prompt from weight, frequency, posture and distance.
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Working at Height Rescue Plan Checker
Score working-at-height rescue plan readiness before site work.
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Hot Works Permit Readiness Checker
Score hot works permit readiness before starting hot works.
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