01
Evidence path
Plan the work
Connect the right templates, calculators and module records before the job reaches site.
Trade Calculators
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.
Field estimates
Trade tools
Plan quantities and allowances, then connect the result to jobs, quotes, RAMS and purchasing.110Calculators
22Trade groups
ยฃ5Trial route
Calculator results are estimates only. Always check measurements, supplier specifications, product data, site conditions and competent advice before ordering materials or starting work.
Trade Estimate To Delivery
Use each estimate as a controlled starting point.
Trade calculators become more useful when teams can carry assumptions into job planning, material checks, site briefings and close-out evidence.
01
Plan the work
02
Control the evidence
03
Brief and close
02
Evidence path
Control the evidence
Keep checks, approvals and site proof attached to the record they support.
03
Evidence path
Brief and close
Turn briefings, actions and reviews into a clear trail for clients and audits.
Trade Calculators In Product
Make trade estimates feel ready for delivery.
Connect field estimates with quotes, RAMS and job records in the wider Zektrx workflow.
1
Trade Estimate
110 calculators
2
Commercial Check
Quotes and costs
3
Safety Context
RAMS and site checks
Trade Estimate
Start with the work package, not a blank sheet.
Trade calculators feel more practical when the result points to the specific trade package, job and assumptions.
Trade calculator workflow
110 calculators
Commercial Check
Carry allowances into quotes and cost decisions.
Material quantities, labour allowances and trade checks can feed quotation and purchasing decisions after the estimate.
Trade calculator workflow
Quotes and costs
Safety Context
Connect field numbers to RAMS and briefings.
Trade calculations become safer when site assumptions can sit beside RAMS, briefings and evidence records.
Trade calculator workflow
RAMS and site checks
Browse by trade
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.
5 tools
Roofing
Tiles, battens, membrane, gutters and flat roof material estimates.
5 tools
Brickwork and blockwork
Bricks, blocks, mortar, wall ties and lintel length schedules.
5 tools
Concrete
Concrete volume, postcrete bags, bagged concrete, rebar and screed estimates.
5 tools
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.
5 tools
Painting and decorating
Paint, wallpaper, labour, primer and trim paint estimators.
5 tools
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.
All trade calculators
Materials, allowances, site checks and planning figures.
General construction
Skip sizes, labour cost, material waste, van payload and site setup allowances.
General constructionEstimate only
Skip Size Estimator
Estimate skip size based on waste type, volume and job type.
Open calculator
General constructionEstimate only
Labour Day Rate Cost Calculator
Estimate labour cost from day rate, number of workers and days.
Open calculator
General constructionEstimate only
Material Waste Allowance Calculator
Estimate material allowance including waste percentage.
Open calculator
General constructionEstimate only
Van Load Capacity Calculator
Estimate whether material weight is within van payload.
Open calculator
General constructionEstimate only
Site Setup Cost Calculator
Estimate welfare, access, protection, skips, parking and prelim allowances.
Open calculator
Electrical
Cable, voltage drop, circuit load, socket and containment planning calculators.
ElectricalEstimate only
Electrical Cable Size Estimator
Estimate cable size guidance from load, length, voltage and installation method.
Open calculator
ElectricalEstimate only
Electrical Voltage Drop Calculator
Estimate voltage drop and percentage from current, cable length, conductor and cable size.
Open calculator
ElectricalEstimate only
Electrical Circuit Load Calculator
Estimate total circuit load and current from appliance wattages and voltage.
Open calculator
ElectricalEstimate only
Socket and Lighting Count Planner
Plan socket and lighting counts from rooms and allowances.
Open calculator
ElectricalEstimate only
Containment Fill Calculator
Estimate approximate tray or trunking fill from cable diameters and containment size.
Open calculator
Plumbing and heating
Radiator sizing, pipe volume, lagging, fitting counts and heating system volume.
Plumbing and heatingEstimate only
Radiator BTU Calculator
Estimate radiator BTU output from room dimensions, insulation and window type.
Open calculator
Plumbing and heatingEstimate only
Pipe Volume Calculator
Estimate water volume from pipe internal diameter and length.
Open calculator
Plumbing and heatingEstimate only
Pipe Lagging Quantity Calculator
Estimate lagging length from pipe length, diameter and fittings allowance.
Open calculator
Plumbing and heatingEstimate only
Plumbing Fitting Count Estimator
Estimate fittings from bathrooms, kitchens and radiators.
Open calculator
Plumbing and heatingEstimate only
Heating System Flush Volume Calculator
Estimate heating system volume from radiators, pipe length and system type.
Open calculator
Roofing
Tiles, battens, membrane, gutters and flat roof material estimates.
RoofingEstimate only
Roof Tile Quantity Calculator
Estimate roof tile quantity from roof area, tile coverage and waste.
Open calculator
RoofingEstimate only
Roof Batten Quantity Calculator
Estimate linear metres of roof batten from roof width, rafter length and gauge.
Open calculator
RoofingEstimate only
Roof Felt Membrane Calculator
Estimate membrane rolls from roof area, roll coverage and overlap allowance.
Open calculator
RoofingEstimate only
Gutter Length Calculator
Estimate gutter length and downpipe count from roof edges and waste allowance.
Open calculator
RoofingEstimate only
Flat Roof Material Calculator
Estimate flat roof membrane, board, upstand and trim quantities.
Open calculator
Brickwork and blockwork
Bricks, blocks, mortar, wall ties and lintel length schedules.
Brickwork and blockworkEstimate only
Brick Quantity Calculator
Estimate bricks from wall length, height, openings, bricks per m2 and waste.
Open calculator
Brickwork and blockworkEstimate only
Block Quantity Calculator
Estimate blocks from wall area, block coverage, openings and waste.
Open calculator
Brickwork and blockworkEstimate only
Mortar Quantity Calculator
Estimate mortar volume from brick or block count, joint thickness and mix allowance.
Open calculator
Brickwork and blockworkEstimate only
Wall Tie Quantity Calculator
Estimate wall ties from wall area, spacing and openings.
Open calculator
Brickwork and blockworkEstimate only
Lintel Schedule Estimator
Estimate lintel lengths from openings and bearing allowance.
Open calculator
Plastering and drylining
Boards, skim, screws, metal studs and jointing compound quantities.
Plastering and dryliningEstimate only
Plasterboard Quantity Calculator
Estimate plasterboard sheets from wall or ceiling area, board size and waste.
Open calculator
Plastering and dryliningEstimate only
Plaster Skim Quantity Calculator
Estimate skim plaster bags from area, coverage per bag and coats.
Open calculator
Plastering and dryliningEstimate only
Drywall Screw Calculator
Estimate drywall screws from board count and screws per board.
Open calculator
Plastering and dryliningEstimate only
Metal Stud Quantity Calculator
Estimate studs, tracks and boards from wall dimensions and stud spacing.
Open calculator
Plastering and dryliningEstimate only
Jointing Compound Calculator
Estimate jointing compound from board joint length and coverage.
Open calculator
Joinery and carpentry
Cutting lists, decking, skirting, stair rise/run and sheet material quantities.
Joinery and carpentryEstimate only
Timber Cutting List Calculator
Estimate stock lengths and waste from required cut lengths, quantities and stock length.
Open calculator
Joinery and carpentryEstimate only
Decking Board Calculator
Estimate decking boards from deck area, board width, gap and waste.
Open calculator
Joinery and carpentryEstimate only
Skirting Board Length Calculator
Estimate skirting length from room perimeter, door openings and waste.
Open calculator
Joinery and carpentryEstimate only
Stair Stringer Rise Run Calculator
Estimate riser count and going from total rise and preferred going.
Open calculator
Joinery and carpentryEstimate only
Sheet Material Quantity Calculator
Estimate sheet material quantities from area, sheet size and waste.
Open calculator
Painting and decorating
Paint, wallpaper, labour, primer and trim paint estimators.
Painting and decoratingEstimate only
Paint Quantity Calculator
Estimate paint litres from wall area, coats, coverage per litre and waste.
Open calculator
Painting and decoratingEstimate only
Wallpaper Roll Calculator
Estimate wallpaper rolls from wall dimensions, roll size and pattern repeat.
Open calculator
Painting and decoratingEstimate only
Decorator Labour Estimator
Estimate decorator labour days from rooms, prep level and coats.
Open calculator
Painting and decoratingEstimate only
Primer Quantity Calculator
Estimate primer litres from surface area, coverage and coats.
Open calculator
Painting and decoratingEstimate only
Gloss Paint Trim Calculator
Estimate gloss paint for skirting, architrave and doors from trim length and coverage.
Open calculator
Flooring
Area, laminate packs, carpet roll length, levelling compound and adhesive.
FlooringEstimate only
Flooring Area Calculator
Estimate flooring area required from room dimensions and waste.
Open calculator
FlooringEstimate only
Laminate Pack Calculator
Estimate laminate packs from area, pack coverage and waste.
Open calculator
FlooringEstimate only
Carpet Roll Calculator
Estimate carpet roll length from room dimensions and roll width.
Open calculator
FlooringEstimate only
Floor Levelling Compound Calculator
Estimate levelling compound bags from area, depth and bag coverage.
Open calculator
FlooringEstimate only
Floor Adhesive Calculator
Estimate floor adhesive tubs or bags from area and coverage.
Open calculator
Tiling
Tiles, adhesive, grout, trim length and bathroom tiling cost.
TilingEstimate only
Tile Quantity Calculator
Estimate tile quantity from area, tile size and waste.
Open calculator
TilingEstimate only
Tile Adhesive Calculator
Estimate tile adhesive bags or tubs from area and trowel coverage.
Open calculator
TilingEstimate only
Grout Quantity Calculator
Estimate grout quantity from tile size, joint width, joint depth and area.
Open calculator
TilingEstimate only
Tile Trim Length Calculator
Estimate tile trim lengths from exposed edges and waste.
Open calculator
TilingEstimate only
Bathroom Tiling Cost Estimator
Estimate bathroom tiling cost from wall area, floor area, material cost and labour.
Open calculator
Groundworks
Excavation, Type 1, hardcore, trench backfill and spoil skip loads.
GroundworksEstimate only
Excavation Volume Calculator
Estimate spoil volume from length, width and depth.
Open calculator
GroundworksEstimate only
Type 1 Sub Base Calculator
Estimate Type 1 sub-base tonnage from area, compacted depth and density.
Open calculator
GroundworksEstimate only
Hardcore Quantity Calculator
Estimate hardcore quantity from area, depth and density.
Open calculator
GroundworksEstimate only
Trench Backfill Calculator
Estimate trench backfill volume from trench dimensions and pipe displacement.
Open calculator
GroundworksEstimate only
Skip Loads for Spoil Calculator
Estimate skip loads from spoil volume, bulking factor and skip size.
Open calculator
Concrete
Concrete volume, postcrete bags, bagged concrete, rebar and screed estimates.
ConcreteEstimate only
Concrete Volume Calculator
Estimate concrete volume from length, width and depth.
Open calculator
ConcreteEstimate only
Postcrete Bag Calculator
Estimate postcrete bags from hole diameter, depth, post size and bag yield.
Open calculator
ConcreteEstimate only
Concrete Bag Calculator
Estimate bagged concrete from volume and bag yield.
Open calculator
ConcreteEstimate only
Rebar Length Calculator
Estimate reinforcement bar length from slab dimensions, bar spacing and laps.
Open calculator
ConcreteEstimate only
Screed Quantity Calculator
Estimate screed volume or bags from area, depth and yield.
Open calculator
Drainage
Pipe fall, soakaway size, manhole rings, drain run materials and gravel surround.
DrainageEstimate only
Drainage Pipe Fall Calculator
Estimate pipe fall in millimetres from run length and fall ratio.
Open calculator
DrainageEstimate only
Soakaway Size Estimator
Estimate approximate soakaway storage volume from drained area, rainfall allowance and soil note.
Open calculator
DrainageEstimate only
Manhole Ring Depth Calculator
Estimate manhole ring build-up from invert depth, cover level and ring sizes.
Open calculator
DrainageEstimate only
Drain Run Material Calculator
Estimate pipes and fittings from drain run length, pipe length and fittings.
Open calculator
DrainageEstimate only
Gravel Surround Calculator
Estimate gravel surround volume from trench dimensions and pipe diameter.
Open calculator
Landscaping
Turf, topsoil, fence panels, paving slabs and gravel quantities.
LandscapingEstimate only
Turf Quantity Calculator
Estimate turf rolls or square metres from lawn area and waste.
Open calculator
LandscapingEstimate only
Topsoil Volume Calculator
Estimate topsoil volume from area and depth.
Open calculator
LandscapingEstimate only
Fence Panel Calculator
Estimate fence panels and posts from run length, panel width and post spacing.
Open calculator
LandscapingEstimate only
Paving Slab Calculator
Estimate paving slab count from area, slab size and waste.
Open calculator
LandscapingEstimate only
Gravel Area Calculator
Estimate gravel tonnes or bags from area, depth and bulk density.
Open calculator
Steel and fabrication
Steel weight, galvanising, weld length, cut grouping and bolt counts.
Steel and fabricationEstimate only
Steel Weight Calculator
Estimate steel weight from section type, size, length and quantity.
Open calculator
Steel and fabricationEstimate only
Galvanising Weight Cost Calculator
Estimate galvanising pickup weight and cost from steel weight and cost per kg.
Open calculator
Steel and fabricationEstimate only
Weld Length Calculator
Estimate total weld length from joint type, length and quantity.
Open calculator
Steel and fabricationEstimate only
Steel Cutting List Optimizer Basic
Create a basic cut grouping and waste estimate from required cut lengths and stock length.
Open calculator
Steel and fabricationEstimate only
Bolt Quantity Calculator
Estimate bolt quantity from connection count, bolts per connection and spare percentage.
Open calculator
HVAC and ventilation
Duct area, air changes, airflow, ductwork material and fan sizing.
HVAC and ventilationEstimate only
Duct Area Calculator
Estimate duct cross-sectional area from duct dimensions or diameter.
Open calculator
HVAC and ventilationEstimate only
Air Change Rate Calculator
Estimate air changes per hour from room volume and airflow.
Open calculator
HVAC and ventilationEstimate only
Ventilation Airflow Calculator
Estimate required airflow from room size and desired air changes.
Open calculator
HVAC and ventilationEstimate only
Ductwork Material Estimator
Estimate ductwork material from duct lengths, sizes and fittings allowance.
Open calculator
HVAC and ventilationEstimate only
Extractor Fan Sizing Estimator
Estimate extractor fan airflow from room type, volume and air changes.
Open calculator
Insulation
Loft rolls, wall boards, pipe insulation, thermal boards and basic U-value checks.
InsulationEstimate only
Loft Insulation Roll Calculator
Estimate loft insulation rolls from area, roll coverage and layers.
Open calculator
InsulationEstimate only
Wall Insulation Board Calculator
Estimate wall insulation boards from wall area, board size and waste.
Open calculator
InsulationEstimate only
Pipe Insulation Calculator
Estimate pipe insulation lengths from pipe length and diameter.
Open calculator
InsulationEstimate only
Thermal Board Quantity Calculator
Estimate thermal board quantities from area, board size and waste.
Open calculator
InsulationEstimate only
Insulation U-Value Estimator Basic
Estimate a simple R-value and U-value from layer thickness and conductivity.
Open calculator
Fire stopping
Mastic cartridges, collars, fire batt, penetration registers and photo evidence checks.
Fire stoppingEstimate only
Fire Stopping Mastic Calculator
Estimate fire-stopping mastic cartridges from joint length, width, depth and cartridge yield.
Open calculator
Fire stoppingEstimate only
Fire Collar Quantity Calculator
Estimate fire collar count from pipe penetrations and spare allowance.
Open calculator
Fire stoppingEstimate only
Fire Batt Board Calculator
Estimate fire batt boards from opening area, board size and waste.
Open calculator
Fire stoppingEstimate only
Penetration Register Counter
Estimate penetration register count and inspection workload.
Open calculator
Fire stoppingEstimate only
Fire Stopping Photo Evidence Checklist
Score fire-stopping photo evidence completeness before close-out.
Open calculator
Glazing
Glass area and weight, survey checks, sealant, packers and panel area.
GlazingEstimate only
Glass Area Weight Calculator
Estimate glass area and weight from width, height, thickness and quantity.
Open calculator
GlazingEstimate only
Window Measurement Checklist
Score window survey completeness before ordering.
Open calculator
GlazingEstimate only
Sealant Cartridge Calculator
Estimate sealant cartridges from joint length, width, depth and cartridge yield.
Open calculator
GlazingEstimate only
Glazing Packers Estimator
Estimate packer count from units and packers per unit.
Open calculator
GlazingEstimate only
Mirror or Panel Area Calculator
Estimate mirror or panel area from dimensions and quantity.
Open calculator
Scaffolding
Scaffold boards, lift heights, edge protection, inspection dates and access planning.
ScaffoldingEstimate only
Scaffold Board Count Estimator
Estimate scaffold board count from platform length, width and board size.
Open calculator
ScaffoldingEstimate only
Scaffold Lift Height Planner
Estimate scaffold lift count from building height and lift spacing.
Open calculator
ScaffoldingEstimate only
Edge Protection Length Calculator
Estimate edge protection length from roof or perimeter lengths.
Open calculator
ScaffoldingEstimate only
Scaffold Inspection Reminder Calculator
Calculate upcoming scaffold inspection dates from start date and inspection interval.
Open calculator
ScaffoldingEstimate only
Temporary Stair Tower Access Planner
Score temporary stair tower access planning readiness.
Open calculator
Solar PV
Panel counts, array kW, roof load, cable runs and simple payback.
Solar PVEstimate only
Solar Panel Count Estimator
Estimate solar panel count from roof area, panel size and spacing allowance.
Open calculator
Solar PVEstimate only
Solar Array kW Calculator
Estimate solar array kW from panel wattage and panel count.
Open calculator
Solar PVEstimate only
Solar Roof Load Estimator
Estimate roof loading from panel weight, mounting weight and roof area.
Open calculator
Solar PVEstimate only
Solar Cable Run Estimator
Estimate solar cable length from inverter location and string runs.
Open calculator
Solar PVEstimate only
Solar Payback Basic Estimator
Estimate simple solar payback from system cost, annual generation and energy price.
Open calculator
Safety exposure
HAVS, noise, manual handling, working at height and hot works readiness prompts.
Safety exposureEstimate only
HAVS Exposure Calculator
Estimate HAVS exposure points from vibration magnitude and trigger time.
Open calculator
Safety exposureEstimate only
Noise Exposure Calculator
Estimate basic daily noise exposure from dB level and exposure time.
Open calculator
Safety exposureEstimate only
Manual Handling Risk Score
Create a manual handling risk prompt from weight, frequency, posture and distance.
Open calculator
Safety exposureEstimate only
Working at Height Rescue Plan Checker
Score working-at-height rescue plan readiness before site work.
Open calculator
Safety exposureEstimate only
Hot Works Permit Readiness Checker
Score hot works permit readiness before starting hot works.
Open calculator