Construction calculators
Browse the full set of construction calculators for materials, earthworks, drainage, planning, productivity and commercial checks.
Concrete & Materials
Concrete Volume Calculator
Estimate concrete volume from length, width and depth, with an optional waste allowance.
Concrete & MaterialsTonnes to Cubic Metres Calculator
Convert tonnes to cubic metres using a material density.
Concrete & MaterialsCubic Metres to Tonnes Calculator
Convert cubic metres to tonnes using a material density.
Concrete & MaterialsAggregate Tonnage Calculator
Estimate tonnes of aggregate needed from area, depth and density.
Concrete & MaterialsTopsoil Volume Calculator
Estimate topsoil volume and approximate bulk bags from area and depth.
Earthworks
Excavation Volume Calculator
Calculate in-situ excavation volume, loose bulked volume, approximate tonnes and lorry loads.
EarthworksTrench Excavation Calculator
Estimate trench excavation quantities from trench length, width and depth.
EarthworksLorry Loads Calculator
Estimate the number of lorry loads needed for a quantity of material.
EarthworksBulking Factor Calculator
Convert in-situ material volume to loose volume after excavation.
EarthworksShrinkage / Compaction Calculator
Estimate compacted volume after applying a shrinkage or compaction percentage.
Roads & Surfacing
Reinforcement
Building Quantities
Bricks / Blocks Calculator
Estimate brick or block quantities from wall area.
Building QuantitiesPlasterboard Sheet Calculator
Estimate plasterboard sheets required from wall or ceiling area.
Building QuantitiesPaint Coverage Calculator
Estimate litres of paint needed from area, number of coats and coverage rate.
Drainage & Levels
Pipe Gradient Calculator
Calculate pipe fall from length and gradient percentage.
Drainage & LevelsFall to Gradient Calculator
Convert a known fall over a length into gradient percentage and ratio.
Drainage & LevelsRamp Gradient Calculator
Calculate ramp gradient, percentage and ratio from rise and run.
Planning & Dates
UK Working Days Calculator
Count working days between two dates, excluding weekends and optional England & Wales bank holidays.
Planning & DatesProgramme Duration Calculator
Calculate calendar days and weekdays between two programme dates.
Planning & DatesNEC Deadline Date Calculator
Add calendar or working days to a start date to estimate a due date.
Planning & DatesRainfall Threshold Days Calculator
Count how many daily rainfall readings exceed a selected threshold.
Productivity & Reporting
Productivity Rate Calculator
Calculate output per day, per hour or per gang from total quantity and time.
Productivity & ReportingRequired Production Rate Calculator
Calculate the daily production rate needed to finish a remaining quantity by a target date.
Productivity & ReportingProgress Percentage Calculator
Calculate progress percentage, remaining quantity and variance to target.
Productivity & ReportingEarned Value Calculator
Calculate SPI, CPI, SV and CV from PV, EV and AC.
Productivity & ReportingPlant Utilisation Calculator
Calculate productive percentage, downtime and overall utilisation from plant hours.