🚜 Construction & Earthworks Calculators
15 calculators available
Construction and earthworks calculations are fundamental to site development, road construction, and geotechnical engineering. Our calculators help contractors and engineers estimate excavation and fill volumes, verify soil compaction against specifications, analyze slope stability using simplified methods, and check retaining wall design against overturning and sliding.
Available Calculators
Asphalt Tonnage Calculator
The Asphalt Tonnage Calculator converts area and compacted thickness into tonnage, with the loose laying depth and estimated cost.
Brick Wall Calculator
The Brick Wall Calculator determines brick quantity and mortar volume from wall area, brick dimensions and joint thickness.
Crane Capacity Calculator
The Crane Capacity Calculator determines lifting capacity at a given radius from the rated load moment, and the utilisation of a planned lift.
Cut & Fill Calculator
The Cut & Fill Calculator estimates excavation and embankment volumes between two cross-sections using the average end area method, and reports the net balance.
Dewatering Flow Calculator
The Dewatering Flow Calculator estimates steady-state groundwater inflow to a circular excavation using the Dupuit-Forchheimer equation.
Drywall Estimator
The Drywall Estimator calculates plasterboard sheets, studs, screws and jointing materials from wall area and board dimensions.
Earthwork Volume Calculator
The Earthwork Volume Calculator computes excavation volume for a rectangular dig, then converts it to loose volume, truck loads and approximate weight.
Lumber Volume Calculator
The Lumber Volume Calculator converts timber section, length and quantity into volume in cubic metres and board feet, with cost.
Paint Coverage Calculator
The Paint Coverage Calculator determines how much paint a job needs, correcting the theoretical quantity for application transfer efficiency.
Retaining Wall Calculator
The Retaining Wall Calculator determines the Rankine active earth pressure coefficient and force on a gravity retaining wall, and checks it against overturning and sliding.
Scaffolding Load Calculator
The Scaffolding Load Calculator determines the load carried by each bay and each standard from the duty classification and bay geometry.
Slope Stability Calculator
The Slope Stability Calculator determines the factor of safety of a slope against shallow translational failure using the infinite slope method, together with the maximum angle at which that slope remains stable.
Soil Bearing Capacity Calculator
The Soil Bearing Capacity Calculator determines ultimate and net allowable bearing pressure from soil strength parameters and footing geometry.
Soil Compaction Calculator
The Soil Compaction Calculator converts a field wet density and moisture content into dry density, then reports relative compaction against the laboratory Proctor maximum.
Trench Volume Calculator
The Trench Volume Calculator determines excavation and backfill volumes for a trench with battered or vertical sides, allowing for pipe displacement.
Related Categories
About Construction Engineering
Estimate cut and fill volumes, earthwork quantities, soil compaction requirements, slope stability factors of safety, and retaining wall design parameters.
Frequently Asked Questions
How do you calculate cut and fill volumes?
Cut and fill volumes are commonly calculated using the Average End Area method: V = (A₁ + A₂)/2 × L, where A₁ and A₂ are cross-sectional areas at two stations and L is the distance between them. For higher accuracy, the Prismoidal Formula can be used.
What is soil compaction?
Soil compaction is the process of increasing soil density by reducing air voids. The degree of compaction is expressed as a percentage of maximum dry density determined by the Proctor test. Most specifications require 90-95% of maximum dry density.
What is factor of safety for slope stability?
Factor of Safety (FoS) for slope stability is the ratio of resisting forces to driving forces. A FoS of 1.0 means the slope is at the verge of failure. Typically, FoS ≥ 1.5 is required for permanent slopes and FoS ≥ 1.25 for temporary excavations.