Full Excel or Google Sheets workbook
An editable Excel or Google Sheets workbook with more features — and this free calculator is included. You control your data and where the workbook is stored; nothing is ever sent to us.
Per item your true margin after sourcing cost + fees, how many to sell to break even, runway with & without a salary. Model booth sales (Fee = 0) and online sales (eBay ~13%). Everything updates as you type.
| Product | Contribution/unit | Units/mo → cover costs | Units/mo → costs + salaries |
|---|
This is a planning estimate — not tax, accounting, or investment advice. "Units to break even" assumes selling only that product; the blended row assumes equal units. No data leaves your browser.
This free calculator shows vintage sellers and resellers exactly how many sales it takes to break even and start making a profit — after your real costs, fees, and pricing.
Is the price I paid for an item a fixed or variable cost?
Variable — your sourcing cost applies per item sold, so enter it as the per-unit cost, not overhead. Platform fees (like eBay's roughly 13%) are variable too.
How do I calculate break-even for vintage sellers and resellers?
Divide your fixed monthly costs by your profit per sale (your price minus the cost and platform fees of each sale). This calculator does the math for you and shows the month you turn a profit.
Is this calculator free to use?
Yes. It runs free in your browser with no account, and your numbers never leave your device. A more detailed downloadable Excel and Google Sheets version is available if you want to keep working offline.