Tools
Free practical calculators and converters for everyday jobs, such as concrete quantity, cubic yards, pool volume, freight density and length conversion.
Concrete Calculator
Calculate concrete volume in cubic yards, cubic feet, and cubic metres, plus an estimated bag count, for slabs, footings, walls, and columns.
ToolsCubic Yard Calculator
Calculate cubic yards from length, width and depth, or from square feet and depth, for rectangles, circles, triangles and trapezoids, with optional allowance, bags, weight and cost.
ToolsFreight Density Calculator
Calculate freight density in PCF and estimate the density-based freight class for LTL shipments.
ToolsLength Converter
Convert length and distance measurements between metric, imperial and specialist units, from feet, inches and metres to nautical, surveying, astronomical and typography units.
ToolsPool Volume Calculator
Estimate your pool's water volume in US gallons, litres, cubic feet, and cubic metres from its shape, dimensions, and actual water depth.
ToolsStair Stringer Calculator
Calculate stair risers, treads, total run, stringer layout length, stair angle and notch throat depth for a straight flight, with a scale diagram that updates as you type.