Break-Even Calculator: quick answer
Calculate break-even units, break-even revenue, and contribution margin from fixed and variable costs.
Fixed costs, Price per unit, and Variable cost per unit.
Break-even units, Break-even revenue, Contribution margin, and Contribution margin ratio.
Build a realistic base case, then change one assumption at a time and compare the chart and table, not only the first result.
What this calculator does
This break-even calculator shows how many units or how much revenue you need before a product, service, or business line covers its fixed costs.
Break-even analysis is useful because it connects pricing, variable cost, and fixed overhead in one simple framework.
It is not a full business model, but it is one of the fastest ways to check whether a unit economics story is realistic.
This page is built for users who need a defensible planning answer, not just quick arithmetic. It translates "Fixed costs", "Price per unit", and "Variable cost per unit" into "Break-even units", "Break-even revenue", and "Contribution margin" so the trade-off is visible in one place instead of being hidden behind a single number.
How to use the break-even calculator
- Enter total fixed costs, price per unit, and variable cost per unit.
- Use break-even units when you manage operational volume. Use break-even revenue when you communicate targets to finance or sales.
- Check the contribution margin carefully because it is the engine that covers fixed cost.
- Start with "Fixed costs", "Price per unit", and "Variable cost per unit". Once the base case makes sense, compare one assumption at a time so you can see exactly what changes the outcome.
Formula and methodology
Contribution margin per unit equals selling price minus variable cost per unit.
Break-even units equal fixed costs divided by contribution margin per unit.
Break-even revenue equals break-even units multiplied by price per unit.
The model maps "Fixed costs", "Price per unit", and "Variable cost per unit" into "Break-even units", "Break-even revenue", and "Contribution margin" using the formulas shown on the page. Keeping those relationships visible makes it easier to separate the core economics from the optional adjustments and to understand which assumption is actually moving the answer.
Formula
If price does not exceed variable cost, break-even is not possible because each unit fails to contribute toward fixed costs.
Worked example and practical context
If a product sells for 60 and costs 25 in variable cost, each sale contributes 35 toward fixed costs.
With 5,000 in fixed cost, you need enough unit sales for those 35 contributions to fully cover that fixed amount.
How to interpret the results
Break-even is the minimum sustainable output level before profit starts to emerge.
A strong contribution margin ratio means each sale converts more revenue into fixed-cost coverage and profit potential.
Read "Break-even units" first, then use the other summary cards, the chart, and the detailed table to judge cash flow today and value creation over time. In most finance decisions, the best option is the one that stays strong across the full picture, not just the one with the most attractive first number.
Common mistakes to avoid
- Using average cost per unit instead of variable cost per unit.
- Ignoring price discounts or commissions that reduce true contribution margin.
- Treating break-even as a target margin of safety rather than the minimum line of viability.
Key terms
- Fixed costs
- Costs that do not change directly with each additional unit sold in the short term.
- Contribution margin
- The amount each unit contributes toward fixed costs and then profit after variable cost is covered.
Frequently asked questions
Practical answers about assumptions, results, and responsible use.