Free Online Break Even Calculator
A break-even tool finds the volume at which revenue covers all costs using units = fixed_costs / (price − variable_cost_per_unit), where the denominator is the contribution margin.
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Formula: break-even units = fixed costs / (price − variable cost). Contribution margin per unit is what each sale contributes toward fixed costs and then profit.
| Units | Revenue | Total cost | Profit / (loss) |
|---|---|---|---|
| 0 | $0.00 | $50,000.00 | -$50,000.00 |
| 167 | $16,700.00 | $56,680.00 | -$39,980.00 |
| 333 | $33,300.00 | $63,320.00 | -$30,020.00 |
| 500 | $50,000.00 | $70,000.00 | -$20,000.00 |
| 667 | $66,700.00 | $76,680.00 | -$9,980.00 |
| 834 | $83,400.00 | $83,360.00 | $40.00 |
| 1,000 | $100,000.00 | $90,000.00 | $10,000.00 |
| 1,167 | $116,700.00 | $96,680.00 | $20,020.00 |
| 1,334 | $133,400.00 | $103,360.00 | $30,040.00 |
| 1,500 | $150,000.00 | $110,000.00 | $40,000.00 |
| 1,667 | $166,700.00 | $116,680.00 | $50,020.00 |
For general planning only. Real-world prices and unit costs change with volume — validate with detailed cost accounting before pricing decisions.
How to Use This Tool
- Enter total fixed costs for the period (monthly or annual — be consistent).
- Enter the price charged per unit.
- Enter the variable cost per unit.
- Optionally enter a target profit to plan toward, not just to break even.
- Read break-even units, break-even revenue and contribution margin.
What Is a Break Even Calculator?
Break-even analysis answers "how many units do I need to sell to stop losing money?" The formula divides fixed costs by the contribution margin per unit (price minus variable cost per unit). The result is the number of units that exactly covers fixed and variable costs; multiply by price to get break-even revenue. Below that volume the business loses money; above it, each additional unit contributes pure profit equal to the contribution margin.
Founders pitching investors use the break-even number to set credible launch milestones. Product managers run sensitivity analysis on price and unit cost to see which input moves the needle most. Inputs cover fixed costs (rent, salaries, insurance — anything independent of volume), unit price and variable cost per unit (materials, packaging, shipping). Outputs include break-even units, break-even revenue, contribution margin per unit and contribution margin ratio. A target-profit field finds the units needed to clear a specific profit goal, not just to break even.
Break-even math assumes price and variable cost stay constant, which they rarely do at higher volumes. Use it for first-pass planning, then refine with scenario analysis. General information only — speak with a qualified accountant for material decisions.
Frequently Asked Questions
What is the break-even formula?
What counts as a fixed cost?
Why does break-even matter?
Published by the WeGotEveryTool team. We build and test every tool in-house and update pages when the underlying spec, formula, or recommendation changes.
Reviewed: May 2026. Disclaimer: this tool is provided as-is for general informational use. For decisions with material consequences (medical, legal, financial, security) verify results against a qualified professional source.
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