What is the Break-even Calculator?
A break-even calculator is a core Cost-Volume-Profit (CVP) financial modeling tool that determines the exact number of units and total sales revenue your business must generate each month so that total revenue equals total expenses. At the break-even point, your business neither makes a profit nor suffers a loss—your fixed monthly overhead is 100% paid off, and every additional unit sold thereafter contributes directly to bottom-line net profit.
Founders, retail operators, ecommerce sellers, and service agencies use this free break even point calculator before signing warehouse leases, hiring salaried team members, or launching new product lines. Beyond calculating your baseline break-even units and revenue, this tool computes your unit contribution margin, models the unit sales required to hit an optional monthly profit goal, and measures your margin of safety when you enter your current monthly unit sales.
How to use the Break-even Calculator
Follow these steps to find your monthly break-even point and test pricing scenarios:
- Enter Fixed Costs per Month: Sum all recurring monthly operating overhead that remains constant regardless of sales volume (rent, salaries, software subscriptions, utilities, and insurance).
- Enter Price per Unit: Input the average selling price (revenue) collected for a single unit, order, or client package.
- Enter Variable Cost per Unit: Input the direct cost incurred to fulfill one unit, including product Cost of Goods Sold (COGS), packaging, shipping, and payment processing fees.
- Add Optional Target Profit & Current Units: Enter a monthly profit target to see how many total units you must sell to hit your goal, and enter your current monthly unit sales to calculate your margin of safety and current monthly profit.
- Simulate Price Changes & Download PDF: Use the What-If price slider (-30% to +50%) and the price benchmark table (-10%, 0%, +10%, +20%) to evaluate pricing power, then click Download Report to save a clean A4 PDF.
Break-even Calculator formula
The break even formula is built on unit contribution margin—the amount of money left from each sale after paying direct variable costs:
Note: ⌈ ⌉ denotes rounding up (ceil) to the next whole unit so fixed overhead and target profit are completely covered.
Worked example
Let's walk through a step-by-step calculation using the exact default numbers pre-loaded in the calculator above:
- Fixed costs per month: $5,000
- Price per unit: $100
- Variable cost per unit: $40
In this baseline scenario, each sale contributes $60 toward paying off your $5,000 monthly fixed overhead. You need 84 unit sales per month (generating $8,400 in revenue) to cover all costs. If you also set an optional $3,000 monthly target profit, you would need ceil(($5,000 + $3,000) ÷ $60) = 134 units ($13,400 revenue).
Why it matters
Every fixed expense you add to your business raises the minimum number of sales required just to survive a slow month. Understanding your break-even volume and contribution margin prevents over-expanding fixed overhead before unit economics are proven, and shows you whether a small price adjustment can dramatically lower your operational risk.
To build a complete financial picture around your break-even point, you can also model your full income statement with our free business profit calculator, verify your per-unit gross retention using the gross profit margin calculator, set optimal retail prices with our product pricing calculator, or estimate upfront launch reserves in the startup cost calculator.