🔨 All 200+ Construction Calculators
Free calculators for every trade and construction calculation. Search below or browse by category.
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Concrete Slab Calculator
Volume, bags and cost for any slab
Concrete Footing Calculator
Strip, pad and pier footings
Concrete Volume Calculator
Any shape — rect, round, steps
Rebar Calculator
Steel reinforcement quantities
Excavation Calculator
Volume and truck loads
Gravel Calculator
Road base and fill material
Concrete Block Calculator
CMU blocks for walls
Concrete Cost Calculator
Ready-mix delivered cost
Concrete Mix Calculator
Site-mixed concrete ratios
Concrete Column Calculator
Round column volume
Concrete Steps Calculator
Steps volume and cost
Post Hole Calculator
Concrete for post footings
Cubic Metres Calculator
Convert dimensions to m³
Brick Calculator
Bricks for any wall
Mortar Calculator
Mortar bags for brickwork
Concrete Block Calculator
CMU blocks and mortar
Tile Calculator
Tiles, adhesive and grout
Render Calculator
Render for masonry walls
Retaining Wall Calculator
Full retaining wall materials
Stone Calculator
Natural stone quantities
Pointing Calculator
Mortar for repointing
Paver Calculator
Pavers for paths and driveways
Timber Framing Calculator
Studs, plates and noggins
Plywood Calculator
Sheets for floors and walls
Drywall Calculator
Plasterboard and fixings
Decking Calculator
Deck boards and joists
Insulation Calculator
Batts for walls and ceilings
Fence Calculator
Posts, rails and pickets
Floor Joist Calculator
Joist spacing and spans
Rafter Calculator
Rafter length and count
Stud Calculator
Wall studs quick count
Board Foot Calculator
Timber volume in board feet
Roof Area Calculator
True sloped area from pitch
Roofing Materials Calculator
Tiles, sheets and battens
Roofing Labour Cost
Labour per square metre
Gutter Calculator
Gutters and downpipes
Colorbond Calculator
Metal sheet quantities
Roof Pitch Calculator
Pitch angle and multiplier
Fascia Calculator
Fascia and barge board length
Sarking Calculator
Underlay for roofing
Paint Coverage Calculator
Any surface — walls, ceilings, exterior
Wall Paint Calculator
Interior walls with deductions
Ceiling Paint Calculator
Litres for any ceiling
Exterior Paint Calculator
Full exterior paint job
Fence & Deck Stain Calculator
Stain for timber fencing
Render Paint Calculator
Paint for rendered walls
Painter Labour Cost
Labour per square metre
Painter Quote Calculator
Full painting job quote
Gravel Calculator
Tonnes and m³ of gravel
Excavation Calculator
Volume and truck loads
Topsoil Calculator
Topsoil for lawns and gardens
Fence Calculator
Posts, rails and pickets
Retaining Wall Calculator
Full retaining wall materials
Mulch Calculator
Mulch for garden beds
Sand Calculator
Sand for bedding and fill
Paver Calculator
Pavers for paths and driveways
Drainage Calculator
Agricultural pipe and gravel
Pipe Flow Calculator
Flow rate for any pipe size
Drain Fall Calculator
Drainage fall and gradient
Hot Water Sizing
Hot water system size
Pipe Insulation Calculator
Pipe lagging quantities
Rainwater Tank Calculator
Tank size from roof area
Shower Flow Calculator
Water use and hot water demand
Plumber Labour Cost
Plumbing labour per hour
Plumbing Quote Calculator
Full plumbing job quote
Cable Size Calculator
Correct cable for any load
Electrical Load Calculator
Total load in amps and kW
Conduit Fill Calculator
Cable fill percentage
Voltage Drop Calculator
Voltage drop over cable run
Circuit Breaker Calculator
Correct breaker rating
Solar Savings Calculator
Solar panel ROI
Electrician Labour Cost
Electrical labour per hour
Electrical Quote Calculator
Full electrical job quote
Contractor Markup Calculator
Selling price from cost
Profit Margin Calculator
Gross and net margin
Quote Price Calculator
Build a complete job quote
Job Profit Calculator
True profit after all costs
Break-Even Calculator
Revenue to cover all costs
Hourly Rate Calculator
What to charge per hour
Materials Cost Calculator
Job materials total
Overhead Rate Calculator
Overhead allocation per job
Subcontractor Rate
Sub charge-out rate
Variation Cost Calculator
Pricing job variations
Labour Cost Calculator
True cost with on-costs
Hourly Rate Calculator
What to charge per hour
Crew Labour Cost
Multiple workers total cost
Overtime Cost Calculator
Overtime and penalty rates
Productivity Rate Calculator
Output per hour benchmark
Apprentice Cost Calculator
True cost of an apprentice
Labour vs Sub Calculator
Employee vs subcontractor
Payroll Tax Calculator
State payroll tax estimate
Concrete Volume Calculator
Volume for any shape
Cubic Metres Calculator
Convert to m³
Square Metre Calculator
Area of any shape
Perimeter Calculator
Perimeter of any shape
Pythagorean Calculator
Right angle and diagonal
Roof Pitch Calculator
Pitch angle and multiplier
Unit Converter
Metric to imperial and back
Circle Calculator
Area and circumference
Steel Weight Calculator
Weight of any steel section
Rebar Calculator
Reinforcement for concrete
Beam Load Calculator
Simply supported beam loads
Bolt Calculator
Bolt quantities for connections
Fabrication Cost Calculator
Steel fab cost estimate
Column Load Calculator
Axial load on columns
Steel Cost Calculator
Steel material cost by weight
Weld Calculator
Weld size and length