Break-Even Sales Calculator
The Point Where a Product Stops Costing You Money
Every product carries fixed costs that exist whether or not a single unit sells — software subscriptions, warehouse rent, salaries. Break-even analysis answers exactly how many units need to sell before those fixed costs are covered and the product starts generating actual profit. Below that number, growth in sales volume is still just closing a gap; above it, every additional sale is pure upside.
The Formula
Break-Even Units = Fixed Costs ÷ Contribution Margin
Break-Even Revenue = Break-Even Units × Price
Contribution margin is what's left from each sale after variable costs (the costs that scale with each unit, like materials or per-item shipping) — that leftover amount is what pays down the fixed costs one unit at a time.
Where Break-Even Analysis Applies
- Launch planning — before committing to a new product line, knowing the break-even volume shows whether the expected market size can realistically clear it.
- Pricing sensitivity — raising price shrinks the break-even unit count fast, since it widens contribution margin directly; this calculator makes that trade-off visible.
- Evaluating fixed-cost investments — deciding whether a new piece of equipment or a bigger ad retainer is worth it comes down to how much it raises the break-even point.
Worked Example
| Input | Value |
|---|---|
| Fixed costs | $5,000.00 |
| Price per unit | $40.00 |
| Variable cost per unit | $15.00 |
| Contribution margin | $25.00 |
| Break-even units | 200.00 units |
| Break-even revenue | $8,000.00 |
All figures computed directly from the calculator's own formula: $5,000 ÷ $25 contribution margin = 200 units, and 200 × $40 = $8,000 in revenue.
How to Use This Calculator
- Enter Fixed Costs for the period.
- Enter the Price per Unit.
- Enter the Variable Cost per Unit.
- Select Calculate to get the break-even unit volume and the revenue it represents.
Related Calculations
Once you're past break-even, track ongoing profitability with the E-commerce Profit Calculator, or see how markup and margin relate on the same unit with the Markup Calculator.