Every business plan eventually collides with one number: how many sales it takes just to cover the bills. Our new break-even calculator finds it in three inputs.
Enter your fixed costs, your price per unit, and your variable cost per unit, and you get:
- Break-even units — fixed costs divided by contribution margin, rounded up, because unit 500 covers the rent and unit 501 makes the profit.
- Break-even revenue — the same target in dollars.
- Contribution margin — what each sale actually contributes after its own costs.
Example: $5,000 in monthly fixed costs, a $25 product, $15 of per-unit cost — you need 500 units, or $12,500 in revenue, per month. And if your variable cost meets or exceeds your price, the tool says so plainly: every sale loses money, and no volume fixes that.
Inputs live in the URL for sharing scenarios with a co-founder, and the calculator is embeddable for business and startup blogs.