Run the numbers before you list.
Free profit calculators and AI listing tools for sellers on Amazon, Shopify, TikTok Shop, Temu, and Walmart. Every fee, every margin, every break-even — in your browser, never sent anywhere.
Free, no signup Numbers stay in your browser 2026 fee tables
Calculators
Plug in your costs, fees, and pricing. Get unit profit, margin, and break-even — instantly, for every marketplace.
Compare Across 4 Marketplaces
Enter your product once. See net profit side-by-side on Amazon FBA, Shopify, TikTok Shop, and Temu. Winner highlighted automatically.
ComparisonTemu Seller Profit Calculator
Real net profit on Temu after commission, logistics, payment, and ad spend. Supports Semi-Managed and Full Consignment models with 2026 rates.
CalculatorTikTok Shop Profit Calculator
Account for referral fees, transaction fees, ad spend, and creator commission — see your true unit profit on TikTok Shop.
CalculatorShopify Profit Margin Calculator
Subtract payment processing, app fees, ad costs, and COGS from your retail price. Get gross and net margins.
CalculatorAmazon FBA Fee Calculator
Estimate referral fees, fulfilment fees, and storage fees for any product on Amazon US. See net profit per unit.
CalculatorAd ROAS & Break-Even Calculator
Find the minimum ROAS that keeps your campaign profitable. Account for margin, ad spend, and target return.
CalculatorInternational Shipping Cost Estimator
Compare DDP, DDU, and air vs. sea freight pricing per kilogram for US, EU, UK, and Asia destinations.
CalculatorCurrency & Pricing Localization
Convert prices across USD, EUR, GBP, JPY, CNY, and 20+ currencies, then snap to a clean local price point.
CalculatorWalmart Marketplace Fee Calculator
Estimate Walmart referral fees, WFS fulfilment costs, storage, and net profit per unit. No monthly subscription fee on Walmart in 2026.
CalculatorListing helpers
Generate titles and descriptions you can paste straight into Amazon, Shopify, TikTok Shop, or Temu. Browser-based templates, not a hidden ChatGPT call.
AI Product Description Generator
Turn bullet-point features into a benefit-led product description with structure, hooks, and CTA — in seconds.
AI ToolAI Listing Title Optimizer
Generate keyword-rich, character-counted titles for Amazon, Shopify, and TikTok Shop. Get 5 variants, pick the best.
AI ToolHow this is different.
Sellerboard charges $19/month. Helium 10 charges $39. Both are good — but for the daily question of "will this product make money on this channel," a free browser calculator is enough. SellerCalcs is that calculator, nine times over.
Three rules we follow:
- Defaults reflect actual 2026 fee schedules — referral, logistics, payment processing, the lot. We update quarterly.
- Nothing leaves your browser. COGS, prices, ad spend — none of it touches our servers. You can use this on a coffee-shop laptop.
- Every tool page is a direct link you can bookmark. No account, no quota, no "upgrade to view."
Walmart, Etsy, eBay, and Shopee calculators are next. Need one we don't have yet? Tell us — most-requested wins.