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CONSTRUCTION FIELD TOOLS BUILT BY A CIVIL ENGINEER

Construction Calculators for Real Site Problems

Free tools for concrete, rebar, formwork, excavation, masonry, plaster, slopes, curing and joints, built and checked by a practising civil engineer. Metric and imperial, with the working shown so you can verify every number.

  • Built by a civil engineer
  • Working shown on every result
  • 188 calculators
  • Metric & imperial
  • Free, no card needed

Most Used

Concrete Volume CalculatorCalculate concrete volume in m³ or cubic yards for slabs, footings, beams, walls and round columns, with wastage and approximate weight. Working shown.Rebar Weight CalculatorCalculate rebar weight by bar size and length: kg per metre with D²/162, total kg and tonnes, or lb/ft for US #3–#18 bars. Includes a full weight table.Cement Bags EstimatorCalculate cement bags, sand and aggregate for concrete by mix ratio (1:2:4, 1:1.5:3, M20, M15) using the dry volume method. 50 kg and 94 lb bags.Brick CalculatorCalculate how many bricks you need for a wall with openings deducted, half-brick or one-brick, plus mortar, cement bags and sand. Metric and US bricks.Excavation CalculatorCalculate excavation volume for trenches, pits and foundations with vertical or sloped sides, then loose volume after swell and dump-truck loads. m³ or yd³.Steel Weight CalculatorCalculate steel weight for plates, flat bar, round and square bar, pipe, rectangular hollow sections and angles. kg/m, total kg and tonnes, or lb/ft.

Browse by Category

Construction Unit Converter20 toolsView all Construction Unit Converters
Rebar & Steel13 toolsView all Rebar & Steel Calculators
Formwork13 toolsView all Formwork Calculators
Concrete16 toolsView all Concrete Calculators
Excavation & Paving13 toolsView all Excavation & Paving Calculators
Brick & Block8 toolsView all Brick & Block Calculators
Plaster & Mortar9 toolsView all Plaster & Mortar Calculators
Tile & Paint6 toolsView all Tile & Paint Calculators
Building & Planning65 toolsView all Building & Planning Calculators
Construction Slope9 toolsView all Construction Slope Calculators
Concrete Curing & Pour Planning9 toolsView all Concrete Curing & Pour Planning Calculators
Concrete Joint & Waterstop Tools7 toolsView all Concrete Joint & Waterstop Tools

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All Calculators A–Z (188)