Tool · Investor Sam Biz

Break-Even Units Calculator

June 30, 2026 • By the Investor Sam Editorial Team • Reviewed by Berly Sam Varghese, Editor
Break-even is the moment a business stops losing money on every sale and starts covering its fixed costs. Knowing that number in units turns a vague goal into a concrete sales target you can plan around. This calculator uses your fixed costs, your price per unit, and your variable cost per unit to find the exact quantity where revenue finally equals total cost. It also shows your contribution margin, the profit each unit throws off toward those fixed costs.

Example: Total fixed costs (per period): 20000 $ · Selling price per unit: 50 $ · Variable cost per unit: 30 $

Units to break even1,000
Revenue at break-even$50,000
Contribution margin per unit$20
Contribution margin40.00%

Worked example

With $20,000 in fixed costs, a $50 price, and $30 of variable cost, each unit contributes $20 toward fixed costs. Dividing $20,000 by $20 gives 1,000 units to break even, which at $50 each is $50,000 in revenue. Every unit sold past 1,000 drops $20 straight to profit. Raise the price or cut the variable cost and the contribution margin rises, pulling the break-even point lower.

Frequently asked questions

What is a contribution margin?

It is the price of a unit minus its variable cost, the amount each sale contributes toward covering fixed costs and then profit. A higher contribution margin means you break even on fewer units.

What counts as a fixed versus variable cost?

Fixed costs stay the same regardless of volume, such as rent, salaries, and insurance. Variable costs rise with each unit, such as materials, packaging, and per-unit shipping or payment fees.

Why does the result round up?

You cannot sell a fraction of a unit and still be profitable, so the calculator rounds up to the next whole unit that fully covers your fixed costs.

How do I lower my break-even point?

Raise your price, cut your variable cost per unit, or reduce fixed costs. Any of the three widens the contribution margin or shrinks what it has to cover, so you break even sooner.

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Sources

Berly Sam Varghese · Editor, Investor Sam

Berly Sam Varghese is an engineer who treats money the way he treats any hard problem — something to be engineered, not gambled on. He funded years of education and built real financial stability the patient way, by living below his means and investing rather than borrowing. He writes for the person building something and trying to keep the finances sane. He reviews and approves every article on Investor Sam and checks the figures against primary sources before anything is published. More about our standards.