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Free tools for Amazon sellers

Calculators and analyzers built by Amazon PPC practitioners. Free, no sign-up, and nothing you enter leaves your browser.

PPC

Turn your margin into a break-even ACoS, a target ACoS and the highest bid you can afford.

Find wasted spend, negatives and harvests, then download an audit and a ready-to-upload bulksheet.

ACoS, ROAS and TACoS from your ad and total sales, and how much of your business is organic.

Fees & profit

2026 US FBA and referral fees, storage, net profit, margin, ROI and break-even ACoS.

Find your 2026 size tier, dimensional weight, billable weight and FBA fee.

Monthly storage cost per unit and per shipment, including October to December rates.

Listings

Check your title against the 2026 75-character rule, plus bullets, banned characters and backend bytes.

Turn a keyword list into a de-duplicated 249-byte backend search terms field.

Inventory

When to reorder and how many units, from daily sales, lead time and safety stock.

Want these numbers live, for every product?

Sotrics connects to your Amazon account and does this work automatically.