Business Calculators

Running a small business or pricing a product usually comes down to a handful of numbers, and getting them right is the difference between a profitable month and a confusing one. The business calculators on this page turn everyday questions — what should I charge, when do I break even, how much tax is added, how much should I discount, and what will my employee actually take home — into quick, plain answers you can act on. **Profitability** is the foundation. A profit margin calculator shows how much of each sale you keep after costs, expressed both as a margin (profit divided by revenue) and a markup (profit divided by cost). These two numbers are easy to mix up: margin is relative to the selling price, while markup is relative to your cost. Knowing both helps you set prices that cover expenses and still earn, whether you run a shop, a service business, or sell online. **Break-even analysis** tells you how many units you must sell before a product or venture stops losing money. It uses your fixed costs (rent, software, salaries that do not change with volume) and your variable cost per unit (materials, shipping, transaction fees) against your price per unit. The gap between price and variable cost is your contribution margin — each sale's contribution toward covering fixed costs. Break-even is your fixed costs divided by that contribution margin. It is one of the most useful planning numbers a small business owner can know. **Sales tax and discounts** are about the price your customer actually pays. A sales tax calculator adds the right tax on top of a sticker price so you can show an accurate total at checkout. A discount calculator does the reverse — it tells you the final price and exactly how much you are giving away, so a 20% off promotion does not quietly eat your whole margin. **Payroll** is where gross and net diverge. A payroll calculator estimates an employee's take-home pay from hours and rate (or salary), then subtracts federal income tax, any state income tax, and FICA (Social Security plus Medicare). The result is a realistic net figure for budgeting hiring costs — while remembering that true withholding depends on allowances, state rules, and employer specifics. Every tool here is free, runs in your browser, and needs no sign-up. Use them to compare scenarios side by side before you price, promote, or hire.