How to use: Break-even calculator
- Type your fixed costs for the period: rent, salaries, tools and everything you pay even if you sell nothing.
- Type the selling price per unit and the variable cost per unit (product, shipping, fees).
- Read how many units and how much in sales you need to stop losing money. If you add a target profit you also see what is needed to reach it.
What it accepts and what you get
- Input
- Fixed costs for the period, selling price per unit, variable cost per unit and, optionally, a target profit.
- Output
- Contribution per unit and as a percentage, units and sales at break-even, and those needed for your target profit.
- Where your data is processed
- Your data is processed in your browser and is not sent to our servers.
Limitations and notes
- Units are rounded up: you cannot sell half a unit.
- If the price does not exceed the variable cost there is no break-even point and the tool explains why.
- It assumes a constant price and costs. It is an estimate to help decide, not a financial forecast.
- Everything is calculated in your browser and nothing is sent or stored.
Frequently asked questions
What is the break-even point?
It is the number of units from which your income covers all your costs. Above it you make a profit; below it you lose money.
What are fixed and variable costs?
Fixed costs do not change with sales (rent). Variable costs grow with every unit sold (materials, shipping).
How do I lower the break-even point?
Raise the price, cut the variable cost or reduce fixed costs. Try each change in the calculator.
When to use it
- Before opening an online shop or launching a product.
- To decide whether a price is sustainable.
- To set a monthly sales target.
Examples
- Base case
- Fixed costs 2,000, price 25 and variable cost 15: you need to sell 200 units (5,000 in sales).
- With a target
- Add a target profit of 1,000 and you will see the 300 units needed.
- No break-even
- With price 15 and variable cost 15 there is no break-even: each sale adds nothing.
Common mistakes
- Putting the product cost under fixed costs.
- Forgetting shipping and fees in the variable cost.
- Assuming you will sell exactly those units: it is the minimum, not a forecast.

