Accurate numbers for online sellers

• Transparent math

  Every calculator publishes the formulas it uses, so you can check the logic and adapt it to your own business.

• Private by design

  Calculator inputs are processed in your browser. Your costs, prices, and margins are not sent to our servers.

• Built for sellers

  Plain-language tools for the decisions that decide whether an online store makes money: pricing, ads, shipping, and inventory.

What you can do on EcomMath

35 free tools, each with its own formulas, examples, and FAQ.

• Conversion Product Sales Health Analyzer Paste a product page URL and get a health score, a list of conversion problems, and an AI fix plan.
• Advertising Break-Even ROAS Calculator Find the minimum return on ad spend you need to cover product cost, shipping, and fees before you launch a campaign.
• Advertising PPC Max CPC & Bid Calculator Work out the highest cost per click you can pay on Google or Meta and still hit your target net margin.
• Profitability True Profit Calculator Deduct product cost, ad spend, and fulfillment to see your real net profit and net margin on every order.
• Product mix SKU Profitability Matrix Calculator Rank up to 10 products by gross profit and sort them into A, B, and C tiers to see which SKUs carry your store.
• Profitability Business Break-Even Calculator Turn your monthly fixed overhead into the number of orders and revenue you need each month to break even.
• Sourcing Landed Cost Calculator Add freight, duties, import taxes, and handling to see the true cost of every unit that reaches your warehouse.
• International Cross-Border Pricing Calculator Add FX fees, import duty, and VAT or GST to see the landed customer price and your net payout abroad.
• Wholesale Wholesale & B2B Margin Calculator Check your wholesale profit, your retailer's margin at MSRP, and the profit on a minimum order quantity.
• Pricing Target Profit Pricing Calculator Work out the selling price that hits your target margin, then test how far you can discount before you lose money.
• Pricing Flash Sale Profit Simulator Test a BFCM or flash sale discount to see whether the extra volume beats your normal daily profit.
• Fees Shopify & Gateway Fee Calculator Estimate Shopify Payments, Stripe, and PayPal processing fees and see your exact payout per order.
• Marketplaces Amazon FBA Profit Calculator Subtract referral fees, FBA fulfillment, storage, and ad cost to see net profit, margin, and ROI per unit.
• Marketplaces Etsy Fee & Profit Calculator Add listing, transaction, payment processing, and offsite ads fees to find your real Etsy profit per sale.
• Marketplaces TikTok Shop Fee & Profit Calculator Subtract TikTok referral fees, creator affiliate commission, shipping, and ad cost to see profit per order.
• Unit economics CAC & LTV Ratio Calculator Compare customer acquisition cost with lifetime value to check whether your unit economics can support scaling.
• Subscriptions Subscription MRR & Churn Calculator Model subscriber growth, churn, lifetime value, and monthly profit for a subscription box or recurring product.
• Subscriptions Net Revenue Retention Calculator Measure NRR, gross revenue retention, and net growth from your existing customers using expansion, churn, and downgrades.
• Advertising Ad Spend & ROAS Simulator Turn an ad budget, CPC, and conversion rate into projected clicks, orders, revenue, ROAS, and profit.
• Advertising Influencer & Creator ROI Calculator Estimate orders, revenue, profit, ROAS, CPA, and CPM for a creator campaign before you pay the fee.
• Advertising Affiliate Commission Payout Calculator See your profit per affiliate sale, total monthly payout, and the highest commission you can afford to offer.
• Retention Email & SMS Marketing ROI Calculator Turn list size, send volume, and click and conversion rates into attributed revenue, profit, and ROI.
• Organic SEO Traffic Value Calculator Value your organic traffic by the paid ad spend it replaces, plus the revenue and profit it generates.
• Growth Conversion Rate Revenue Calculator See how much extra revenue and profit a higher conversion rate adds from the traffic you already have.
• Growth Landing Page Payback Calculator Find how many extra orders a landing page tool or agency needs to win before it pays for itself.
• Growth Cart Abandonment Recovery Calculator Size your abandoned-cart revenue pool and see the orders and profit a recovery email or SMS flow can win back.
• Revenue Bundle & Upsell Profit Calculator Compare single-item and bundle orders to see the AOV lift, profit change, and the biggest discount you can afford.
• Shipping Free Shipping Threshold Calculator Test a free-shipping threshold to see whether the larger baskets pay for the shipping you give away.
• Returns Return & Refund Cost Calculator Measure the monthly profit your returns cost you, your margin after returns, and the orders needed to recover.
• Risk Chargeback & Fraud Cost Calculator Calculate monthly chargeback losses, the orders needed to recover them, and your card-network risk level.
• Cash flow Cash Flow & Runway Calculator See your monthly burn or surplus, cash runway, cash conversion cycle, and the working capital tied up in stock.
• Inventory Inventory Reorder Calculator Calculate your reorder point and safety stock so you never run out of bestsellers or overstock slow movers.
• Inventory Inventory Carrying Cost Calculator Add storage, insurance, shrinkage, and cost of capital to see what holding your inventory costs each year.
• Shipping Dimensional Weight Calculator Compare dimensional weight with actual weight to find the billable weight carriers will charge you for.
• Shipping Packaging & Box Optimization Calculator Compare your current box with a smaller one to see the billable weight, shipping, and material you would save.