Break Even Calculator – Find Your Profit Threshold
Use this free break even calculator to see how many units you must sell to cover all your fixed and variable costs. Enter your total fixed costs, selling price per unit and variable cost per unit. The tool calculates your contribution margin, break-even quantity and break-even revenue so you can test different prices, cost structures and sales targets without complex spreadsheets.
Break Even Calculator
Estimate how many units you need to sell to cover your fixed and variable costs. Enter your total fixed costs, selling price per unit and variable cost per unit to see the break-even quantity and revenue.
How the break-even formula works
Break-even analysis sits at the heart of cost-volume-profit (CVP) planning. The idea is that every unit you sell contributes something towards covering fixed costs once you have paid its variable cost. This difference is called the contribution margin. When the sum of all contribution margins in a period exactly equals your fixed costs, you are at break-even: you have neither profit nor loss.
Break-even units = Fixed costs ÷ (Price per unit − Variable cost per unit)
Once you know the break-even quantity, the break-even revenue is simply that quantity multiplied by the selling price. You can also look at the contribution margin ratio: contribution margin per unit ÷ price per unit, expressed as a percentage. A higher contribution margin ratio means every sale pays down fixed costs faster and pushes you beyond break-even with fewer units.
Using the break-even calculator for real-world decisions
Break-even analysis is one of the first budgeting tools many founders and managers learn because it links costs, price and volume in an intuitive way. Instead of guessing whether an idea is “profitable”, you can quantify how much demand you need before profit appears. The calculator on this page gives you a quick way to see that relationship for your own numbers. Once you know your break-even quantity, you can compare it with realistic sales forecasts, capacity and marketing plans to judge whether a product or project is viable.
To get the most from the tool, start by listing your fixed costs for the period you are analysing. For a year, that might include office or warehouse rent, permanent staff salaries, insurance, licences, equipment leases and software subscriptions. Then identify your variable cost per unit: raw materials, packaging, transaction fees, sales commission per unit, and any shipping or handling that scales directly with volume. Finally, decide on a realistic selling price per unit based on your market, customers and competitors. Enter these three inputs into the calculator and it will compute your contribution margin and break-even point instantly.
Because the break-even formula is purely algebraic, it is ideal for “what if” analysis. You can see how sensitive your break-even quantity is to changes in cost or price. For example, what happens if a supplier discount reduces your variable cost per unit by 10%? What if you increase price by 5% but accept a small drop in expected volume? A higher contribution margin per unit always reduces the units you must sell to reach break-even. By moving the inputs up and down in the calculator, you build intuition for how pricing and cost control work together.
The outputs also help with goal setting. Suppose you are launching a new café. You can estimate monthly fixed costs (rent, staff, utilities, permits), the average spend per customer and the variable cost of ingredients per order. The calculator tells you the number of orders per month needed to break even. You can then compare that with factors like footfall, seating capacity and opening hours. If the break-even level is far above what seems achievable, you may need to revisit your menu pricing, shop size or staffing plan before committing capital.
Break-even analysis has limitations. It assumes a single price and cost per unit, while real businesses may offer multiple products, bundles and discounts. It also ignores time value of money, which can be important for long-term projects or capital-intensive investments. For those scenarios, you might combine this tool with our ROI Calculator or Compound Interest Calculator to understand returns over time. Still, as a first pass for pricing and cost-structure decisions, break-even is a fast, transparent way to stress test your assumptions.
You can also embed break-even thinking into ongoing performance reviews. Once the business is running, compare your actual monthly sales volume with the break-even level from this calculator. If you are consistently below it, you know you must either increase sales, raise prices, reduce variable costs or cut fixed costs—or a combination of all four. Small improvements in margin or utilisation can shift the break-even point meaningfully, and tools like this make those trade-offs visible to your team.
Finally, remember that this calculator is educational, not financial advice. It does not handle taxes, financing costs, step changes in capacity or sophisticated multi-product mixes. Before making major investment or pricing decisions, consider working through detailed projections and, if needed, consulting an accountant or financial adviser. Use the break-even output as a starting point for deeper analysis rather than a one-line verdict on your business.