Methodology, examples, and practical guidance
Break-Even Calculator: Units & Sales Revenue
Break-even volume is the number of sales needed to cover fixed costs after paying the variable cost of each sale. Use the same period for fixed costs and planned sales, such as one month.
THE METHOD
The formula
Use the following method with your own business figures.
Selling price must exceed variable cost. If contribution is zero or negative, additional sales cannot cover positive fixed costs; a displayed zero is not a valid break-even target.
PUT IT TO WORK
A worked example
These figures illustrate the calculation, not a recommended business target.
- $50 selling price − $20 variable cost = $30 contribution per unit.
- $5,000 monthly fixed costs ÷ $30 = 166.67 units.
- Round up to 167 whole units; 167 × $50 = $8,350 sales revenue.
167 units cover the example costs, with $10 remaining after fixed and variable costs.
USE THE RESULT
How to interpret the number
Put the result in context
Compare required sales with capacity and realistic demand. Fractional break-even points are rounded up, so the last unit needed may already generate a small operating profit.
CHECK YOUR ASSUMPTIONS
Common mistakes
Check the inputs and assumptions
Do not include the same expense in both fixed and variable costs. This single-product model also assumes a stable selling price and variable cost per unit.
Questions business owners ask
Use these answers to refine the assumptions behind the calculator—not as a substitute for advice specific to your business.
Can I use this for several products?
A mixed-product business needs an appropriate weighted contribution and a stable sales mix. Entering one product's contribution alone will not model the full mix.
Planning note: Use this educational estimate alongside your records and qualified professional advice for significant business decisions.