Everyday Mathematics

Calculators and tools in the Everyday Mathematics section.

Practical Calculations

Calculators in the Practical Calculations topic.

Margin Calculator

Calculate trade margin, markup and gross profit from purchase and selling price, or determine the selling price from a target margin or markup – net, with calculation steps.

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Price Comparison Calculator

Compare offers fairly: calculate the unit price per unit (kg, liter, piece), find the cheapest offer and see how much more the others cost in percent.

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Recipe Converter

Convert recipe amounts to a different number of servings or a free factor – all ingredients are scaled proportionally, with calculation steps.

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Tip Calculator

Calculate a tip as a percentage or round the bill up to an even amount – including total, amount per person and effective percentage.

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