Tools & calculators
Every calculator runs live in your browser with your own numbers — no signup, no black box. Each one links back to the guide that explains its assumptions.
Interactive now
Marketplace Fee Calculator
See what a marketplace actually takes from a sale — referral fee, per-order fee, fulfillment, and estimated net proceeds — before you commit to a price.
Product Profitability Calculator
Model true per-unit and per-order profitability for a SKU, including COGS, fees, ad spend, and returns.
Break-Even ROAS Calculator
Find the minimum ROAS (and maximum ACOS) at which an ad campaign is still profitable, given your margin.
Margin & Markup Calculator
Quickly solve for price, margin, or markup when you know the other variables.
Beginner's Ecommerce Unit Economics Calculator
A simplified first-product profitability check for sellers who haven't launched yet.
Safety Stock & Reorder Point Calculator
Calculate the safety stock and reorder point that protects you from stockouts without overstocking.
Amazon IPI Risk Checker
Check your four Inventory Performance Index inputs — excess inventory, sell-through rate, stranded inventory, and in-stock rate — against Amazon's own published guidance to see which one is putting your FBA storage and restock privileges at risk.
Repricer ROI Calculator
Find the sales lift a repricing tool actually needs to produce before it's worth its subscription — using your own unit volume and margin, not a made-up average win-rate boost.
Marketplace Payout Timing Calculator
See how long cash actually takes to reach your bank account on Amazon (delivery-based reserve) versus Walmart (bi-weekly settlement with a shipment-based hold) — using your own handling and transit times, not a flat '14 days' assumption.
Shipping Cost Calculator
Estimate shipping cost by weight, dimensions, zone, and service level.
Landed Cost Calculator
Model true landed cost per unit including freight, duties, and customs fees.
Advertising Budget Calculator
Set a defensible starting ad budget from a revenue goal and target ROAS/TACOS.
Marketplace Comparison Tool
Compare marketplaces side by side on fees, reach, requirements, and competition for your category.
Marketplace Readiness Assessment
Score your readiness to expand to a new marketplace and see your gap list.
Product Opportunity Scorecard
Score a product idea on demand, competition, margin, and compliance complexity.
Supplier Evaluation Scorecard
A structured template for vetting a new supplier before you commit.
Marketplace Expansion Scorecard
Decide which marketplace to add next based on current performance and operational capacity.
Ecommerce Technology Stack Builder
Map your current vs. target technology stack and prioritize what to adopt next.
Account Health Dashboard Template
A downloadable template for proactively monitoring account health metrics across marketplaces.
KPI Dashboard Template
A standardized starter KPI dashboard for ecommerce and marketplace sellers.
Amazon FBA vs. Walmart WFS Fee Calculator
Enter a product's category, price, weight, and dimensions to see Amazon FBA and Walmart WFS fulfillment fees, referral fees, and net proceeds side by side.
Multi-Marketplace Fee Calculator
Compare what eBay, Etsy, and TikTok Shop actually keep from the same sale — final value fee, transaction and payment-processing fees, and referral fee, side by side. Target Plus isn't included: it has no publicly published fee schedule to model.