Business math
Business Calculators
Calculate margin, markup, commission, tax, break-even, unit price and ROI with the business meaning of each figure kept clear.
Profit Margin CalculatorFind gross profit and margin from cost and selling price.
Markup CalculatorCalculate markup on cost and the resulting selling price.
Commission CalculatorCalculate commission amount and net proceeds.
Sales Tax CalculatorAdd or remove sales tax from a price.
Break-Even CalculatorFind break-even units and revenue from fixed and variable costs.
Unit Price CalculatorCompare products or packages on a consistent per-unit basis.
ROI CalculatorMeasure gain or loss relative to the amount invested.
How to choose the right calculator
Business ratios are easiest to misuse when two formulas use the same numbers with different bases. These tools identify whether the percentage is based on cost, revenue, investment or another reference amount.
Each calculator opens directly to the tool. Supporting explanation comes after the result so the page remains useful first and informative second.