Merchant operations toolkit
Ecommerce profit, catalog,
and inventory tools.
Free ecommerce calculators and file tools that work where your data already is: in your browser.
- No account
- No server uploads
- No tracking pixels
Core tools
Start with a focused workflow
Quick calculation
Is this product actually profitable?
Start with direct unit economics. Use the full calculator page for assumptions, limitations, and pricing guidance.
Your result will appear here
Complete the inputs and run the tool. Nothing leaves this device.
The toolkit
Small tools for expensive decisions
Pressure-test product economics, prepare structured catalog data, and plan replenishment without sending business data to a service.
Economics
Price and contribution
Calculate profit per unit, net margin, markup, total profit, and break-even price from your real product costs.
Find your maximum acquisition spend, break-even ROAS, and target-profit ROAS from product contribution margin.
Model marketplace, payment, and fixed fees using rates you enter—without assuming a specific platform or fee schedule.
Price a multi-item bundle and check customer savings, fee-adjusted profit, and bundle margin.
Estimate how product returns change revenue, recoverable cost, total profit, and net margin.
Catalog
Structure and quality
Generate every combination of product option values, preview the matrix, and download it as CSV.
Turn product or variant names into unique, consistent SKUs and export a two-column CSV.
Validate a product CSV locally for missing columns, duplicate SKUs, invalid prices, inventory, and URLs.
Check product titles for a custom character limit, exact duplicates, and normalized near-duplicates.
Private by design
Your catalog is not our dataset.
Calculators and file checks run on your device. There is no account, application backend, database, upload retention, or AI API. Read our privacy approach.
GUIDES & RESOURCES
Work the problem, then check the result.
Use a clean import and an explicit cost model to compare which SKUs create contribution dollars, not just revenue.
Reviewed 18 August 2026↗02 · PAID ACQUISITIONHow to Calculate Returns-Aware Break-Even ROASTranslate mature-cohort return behavior into the maximum ad spend a product can support.
Reviewed 18 August 2026↗03 · UNIT ECONOMICSHow to Calculate Ecommerce Contribution MarginFind what each order contributes after variable costs, without confusing contribution margin with gross margin or net profit.
Reviewed 18 August 2026↗04 · INVENTORY CONTROLHow to Set a Reorder Point for Ecommerce InventoryConvert sales velocity and replenishment lead time into an inventory trigger, with a defensible safety-stock buffer.
Reviewed 18 August 2026↗