Free tools

The same money math, in public

• Ecommerce True Profit CalculatorTrue profit is contribution after discounts, COGS, marketplace fees, payment fees, shipping, refund impact and fulfillment — not the number in your sales dashboard.
• Break-even ROAS CalculatorBreak-even ROAS is contribution-aware. Using revenue ÷ ad spend against gross sales will tell you that unprofitable ads are working.
• Return Cost CalculatorRefund, inbound shipping, inspection, unsellable remainder, and lost contribution on the original sale all sit on the same event.
• Inventory Discrepancy CalculatorA 2-unit storefront miss is not a rounding error when contribution is $35. Translate divergence into potential exposure — and keep it labeled potential until proven.
• Marketplace Fee Impact CalculatorA 15% referral fee on a low-ticket item can erase the unit. Compute fee dollars from basis points without floating point.
• Ecommerce Margin CalculatorGross margin stops at COGS. Contribution keeps going. If you manage to gross margin you will scale ads into a hole.