Construction calculators

Enter the rebar size, material strengths, cover, spacing, and splice conditions to estimate the required straight tension lap splice length under the stated ACI 318-19 procedure.

Enter the batch weights, material temperatures, aggregate moisture, and target temperature. The calculator estimates the no-ice temperature, the ice that can replace mixing water, and the water temperature needed without ice.

Enter a rectangular slab size, thickness, and planning rules to lay out equal control-joint panels. The result gives the lowest interior saw-cut footage that meets the selected spacing and panel-shape limits.

Enter slab-level weather and concrete conditions to estimate evaporation in US and metric units. The calculator also estimates total water loss and solves for the maximum wind speed that meets your selected planning limit.

Enter the placement height, rate, concrete properties, and tie grid to estimate design lateral pressure and the maximum vertical spacing allowed by the tie load. The calculator also checks whether the entered tie grid can support the selected placement condition.

Enter field temperature periods and three project calibration points to estimate in-place concrete strength. The calculator also reverses the curve to estimate the curing time needed to reach a target strength.

Enter the contract sum, approved change orders, completed work, stored materials, retainage rates, and prior payments to estimate the current payment due on a construction pay application.

Enter the cut, fill, reuse percentage, shrinkage, swell, and truck capacity. The calculator shows whether reusable onsite cut covers the compacted fill and how much material must be imported or exported.

Use expected bucket fill, cycle time, working efficiency, and material swell to estimate an excavator’s production rate. Add a truck capacity and haul time to see passes per truck, loading time, and a balanced fleet size.

Enter the sand-cone apparatus readings, moisture-tin weights, and laboratory maximum dry density. The calculator reduces the test to hole volume, wet and dry density, relative compaction, and a pass or fail margin.