Self-initiated static-shell sample · no tracking
Know the traffic your offer needs to break even.
Change four inputs. The page recalculates locally in your browser—no account, database, or form submission.
Run the numbersInteractive calculator
Monthly break-even check
Use contribution profit per sale—not top-line order value—for a useful result.
Projected monthly position
$0
Calculating…
- Projected sales
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- Contribution profit
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- Break-even sales
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- Break-even visitors
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Profit vs. fixed cost
Updates with every input change.
Method
Simple enough to inspect.
Projected sales = visitors × conversion rate. Contribution profit = projected sales × profit per sale. Net position = contribution profit − fixed cost.
What this does not predict
Demand, seasonality, repeat purchases, refunds, taxes, variable acquisition cost, or business success. It is a planning aid—not financial advice.
Shell architecture
One reusable page pattern. Many calculators.
- Semantic HTML and keyboard-friendly inputs
- Reusable design tokens and responsive grids
- Local calculations with no user-data collection
- Canonical, Open Graph, JSON-LD, sitemap, and robots
- Chart.js loaded through a version-pinned CDN asset