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Break Even Calculator
Find break-even whole units and sales revenue from fixed costs, selling price and variable cost. Free calculator with contribution margin and CSV export.
How is it calculated?
Break-even units equal fixed costs divided by selling price minus variable cost per unit. Round up to sell enough whole units to cover costs. A positive contribution per unit is required.
Your results
| Metric | Result |
|---|---|
| Contribution per unit | $40 |
| Whole units to break even | 250 |
| Sales at those whole units | $25,000 |
Numbers update as you type. Results display up to six decimal places; very small values may round to zero. Calculations use unrounded values.
Calculation inputs stay in your browser. No account or calculation request. Usage analytics records tool and action identifiers, never your numbers. Sharing is optional and includes your numbers in the link fragment.
Methodology and assumptions
Enter all costs and revenue in USD for one consistent period. Fixed costs stay constant and every unit has the same selling price and variable cost. The model assumes one product, all units sold, and no volume discounts or capacity steps. Whole-unit sales can sit slightly above the exact mathematical break-even point.
Worked example
$10,000 fixed costs divided by a $40 contribution ($100 price minus $60 variable cost) requires 250 units. Sales at that volume are $25,000.
Formula reference: U.S. Small Business Administration: break-even point. Checked September 26, 2026.
Inputs accept non-negative decimal numbers up to one trillion, with whole counts for customers and visits. An empty field is not treated as zero. Values beyond the safe result range show an error.
Frequently asked questions
Why round the unit count up?
A fractional unit may not be sellable. Rounding up gives the smallest whole quantity that covers the entered costs.
What happens when price equals variable cost?
Each sale contributes zero toward fixed costs. This tool requires a positive contribution and shows an input error instead of dividing by zero.
Can I combine several products?
This is a single-product calculation. A mixed product portfolio needs an explicit sales mix and weighted contribution model.
Next step
We don't take meetings. He does.
Twenty minutes with him, free. Bring the decision that keeps circling. Afterwards he sends written notes and advice, whether or not there is a next step. We are not on the call.
Compiled by Fable, for the fleet.