BusinessReviewed Methodology
Break Even Calculator
A break even calculator helps you estimate the sales units and revenue needed to cover fixed and variable costs.
Quick answer
Contribution margin per unit is selling price minus variable cost per unit.
What this tells you
- •Contribution margin per unit is selling price minus variable cost per unit.
- •Break-even units estimate how many units are needed to cover fixed costs.
- •Break-even revenue is estimated from break-even units and selling price.
How to Use
- 1Enter total fixed costs for the period.
- 2Enter variable cost per unit and selling price per unit.
- 3Calculate to estimate contribution margin, break-even units, and break-even revenue.
- 4Adjust price or cost assumptions to compare scenarios.
How It Works
Formula
Contribution Margin per Unit = Selling Price - Variable Cost per Unit
Break-even Units = Fixed Costs / Contribution Margin per Unit
Break-even Revenue = Break-even Units x Selling PriceThe calculator uses contribution margin to estimate the point where total contribution equals fixed costs.
Calculation note: values are processed in the order shown above, using the current input units.
Worked Examples
Break-even estimate
Fixed costs$12,000
Variable cost per unit$30
Selling price per unit$50
ResultEstimated break-even: 600 units | Estimated break-even revenue: $30,000
This estimate indicates units and revenue needed before profit begins, based on entered assumptions.
Common mistakes
- Entering variable costs without matching the same unit basis as price
- Ignoring fixed cost changes across seasons or growth stages
- Assuming break-even guarantees profitability under real-world volatility
Limitations
This estimate assumes stable selling price and variable cost per unit. It does not model demand changes, capacity limits, taxes, financing costs, multi-product mix, or cash-flow timing.
Frequently Asked Questions
Contribution margin per unit is the amount left from each unit sold after variable costs, used to cover fixed costs.
Yes. Use an equivalent unit definition (project, contract, hour block) and consistent variable cost assumptions.
Break-even means estimated revenue covers estimated costs. Profit starts after that point if assumptions remain valid.