Trade calculators and estimating tools
Practical trade calculators and estimating tools for estimates, quantities, materials, labour and quotations.
Built for quick planning on site, in the office or on a phone. Check measurements, manufacturer specifications, local regulations and professional requirements before ordering or installation.
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Based on recent tools used on this device.
Air Change Calculator
Calculate air changes per hour from room volume and airflow.
Electrical ToolsBattery Runtime Calculator
Estimate battery runtime from capacity, voltage, load and usable capacity.
Fabrication ToolsBend Allowance Calculator
Calculate sheet-metal bend allowance from angle, radius, thickness and K-factor.
Carpentry ToolsBoard Cutting Optimiser
Optimise linear timber cuts across stock lengths using a practical first-fit plan.
Carpentry ToolsBoard Foot Calculator
Calculate North American board feet from thickness, width, length and quantity.
Heating ToolsBoiler Size Calculator
Estimate a preliminary boiler output from floor area, heat loss and hot-water allowance.
Home & Trade ToolsBrick Calculator
Estimate bricks, mortar allowance and waste from wall dimensions.
Builders ToolsBuilding Sand Calculator
Estimate sand volume, weight and bulk bags from area and depth.
Home & Trade ToolsCarpet Calculator
Estimate carpet area and cost with a configurable waste allowance.
Masonry ToolsConcrete Block Calculator
Estimate concrete blocks from net wall area, nominal block size and joint thickness.
Masonry ToolsConcrete Mix Materials Calculator
Estimate concrete mix volumes, material weights and cement bags from a chosen mix ratio.
Electrical ToolsConduit Fill Calculator
Estimate cable fill percentage inside round electrical conduit.
Plumbing ToolsCylindrical Tank Calculator
Calculate capacity of a horizontal or vertical cylindrical tank.
Carpentry ToolsDeck Screw Calculator
Estimate deck screw count from board count, joists and screws per fixing.
Painting ToolsDecorating Labour Quote Calculator
Estimate decorating labour hours and quote from area, coats, productivity and rate.
Plumbing ToolsDrainage Fall Calculator
Calculate drainage fall, gradient and end-level difference.
Electrical ToolsElectrical Power Calculator
Calculate single-phase electrical power from voltage, current and power factor.
Electrical ToolsEV Charging Time Calculator
Estimate electric vehicle charging time from battery, state of charge and charger power.
Heating ToolsExtractor Fan Calculator
Estimate extraction airflow from room volume and target air changes.
Fabrication ToolsFabrication Cutting List Optimiser
Optimise bar and section cuts across stock lengths with kerf allowance.
Fabrication ToolsFabrication Quote Calculator
Estimate fabrication price from material, labour, consumables, overhead and margin.
Roofing ToolsFascia and Soffit Calculator
Estimate fascia length and soffit area from eaves dimensions.
Home & Trade ToolsFence Calculator
Estimate fence panels and posts from run length and panel width.
Landscaping ToolsFence Panel Calculator
Estimate fence panels, posts and panel cost from run length.