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Everyday math.
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Free online calculators for shipping, building, business, and the decisions in between.
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12 practical calculators.
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Logistics
Plan shipments, estimate volume and weight, and understand pallet loads.
4 calculatorsConstruction
Estimate practical material quantities for renovation and building projects.
3 calculatorsBusiness
Check unit economics, margins, taxes, and break-even points.
3 calculatorsEveryday
Solve common percentage and travel-cost questions in seconds.
2 calculatorsA GOOD PLACE TO START
Featured calculators
CBM Calculator
Calculate cubic meters (CBM) for one box or an entire shipment, plus cubic feet.
Open calculatorDimensional Weight Calculator
Compare actual and volumetric weight for parcels using a configurable carrier divisor.
Open calculatorConcrete Volume Calculator
Estimate cubic meters of concrete for a rectangular slab, including waste allowance.
Open calculatorProfit Margin Calculator
Calculate gross profit, margin and markup from revenue and cost.
Open calculatorYOUR EVERYDAY TOOLKIT
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Every calculator includes its formula, a worked example, and the assumptions behind it.
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Clear inputs, useful results, and a simple reset when it’s time for the next calculation.