These free calculators help you answer common money questions about your small business in a few seconds. Each one shows the formula it uses, a worked example, and links to a full guide if you want to go deeper. No sign-up is needed.
Break-Even Calculator
Find out how many units you need to sell, and how much revenue you need, to cover your fixed and variable costs. You can also add a target profit to see the sales you need to reach it.
Profit Margin Calculator
Calculate your gross profit margin, operating profit margin, and markup from your revenue and costs. It also shows the selling price you need to reach a target margin on a product.
Self-Employment Tax Calculator
Estimate the Social Security and Medicare tax you owe on self-employment profit for 2025, 2026, or 2027, including the effect of W-2 wages and the deduction for half of the tax.
These calculators provide estimates for planning purposes only. They are not financial or tax advice.