What this calculator measures
A break-even calculation separates fixed costs from costs that change with each unit sold. The difference between price and variable unit cost is the contribution margin. Dividing fixed costs by that contribution gives the sales volume required to cover the recorded cost base.
The model is most useful for comparing pricing and cost scenarios. It is less reliable when price, variable cost or demand changes sharply as volume grows, so the result should be treated as a planning threshold rather than a forecast.
How to use the Break-Even Calculator
- Enter fixed costs for the period being planned.
- Enter selling price and variable cost for one unit.
- Review the contribution margin and minimum whole units required to break even.
The calculator rounds break-even units up to the next whole unit and also reports contribution margin ratio and break-even revenue.
Worked example
With $50,000 fixed costs, a $100 selling price and $40 variable cost, contribution is $60 per unit. Break-even volume is 834 whole units and break-even revenue is $83,400.
Assumptions and limitations
- Price and variable unit cost are assumed to stay constant across volume.
- The calculation does not estimate whether the required demand exists.
- Multiple products require a defensible sales-mix assumption.
- Cash timing, inventory and financing requirements are outside this model.