Free Amazon, KDP and TikTok Shop seller tools
Calculators and checkers built on the 2026 fees and rules, with the source linked for every number. The same maths Hawk Notch runs in client audits.
- Break-even ACoS, royalties and TikTok Shop profit in seconds
- Listing and account health checks against the current rules
- Share a result as a link, or export it
- For Amazon sellers5 tools
- For KDP authors1 tool
- For TikTok Shop brands4 tools
- Share, CSV and printOn every tool
Pick a tool
Every tool runs in your browser, needs no sign-up, and shows the date its rules were checked.
Break-Even ACoS & ROAS Calculator
AmazonBreak-even and target ACoS, ROAS, break-even CPC and TACoS from your real fees
- Break-even ACoS
- ROAS
- Break-even CPC
Conversion & Sales Goal Calculator
AmazonUnit session %, what a higher rate is worth, and the traffic your revenue goal needs
- Unit session %
- Extra revenue
- Sensitivity table
Listing Score & Title Checker
AmazonEvery 2026 Amazon listing rule as pass, warn or fail, with the 75-character title limit and a 0–100 score
- Listing score
- Title check
- Search terms
Order Defect Rate Checker
AmazonOrder defect rate, late shipments, cancellations, tracking and on-time delivery from your raw counts
- Order defect rate
- Shipping metrics
- Headroom
Brand Registry Eligibility Checker
AmazonEight questions on trademark, branding and photos: see if you can enroll, what blocks you and what to do next
- Readiness score
- Blocking items
- Your route
Book Royalty & List Price Calculator
KDPeBook, paperback and hardcover royalties in every KDP store, on the 2026 rules
- Royalty per sale
- Printing cost
- Minimum list price
Profit per Order & ROI Calculator
TikTok ShopProfit per order after every TikTok fee, plus your break-even GMV Max ROI and max CPA
- Profit per order
- Break-even ROI
- Max CPA
Creator Commission Calculator
TikTok ShopWhat to pay TikTok Shop creators, what each sale leaves you and when samples pay back
- Profit per creator sale
- All-in take rate
- Max commission
Listing Rules & Score Checker
TikTok ShopScore a listing against TikTok Shop's title, image, description and pricing rules
- Listing score
- Fixes to make first
- Title rules
Account Health Rating Checker
TikTok ShopYour Account Health Rating zone, next milestone and weeks to recover, on the July 2026 system
- Zone and score
- Next milestone
- Weeks to recover
Free tools, answered
How the tools work and how current their rules are.
Reviewed by Uzair, founder of Hawk Notch FULL NAME: CONFIRMUpdated
Are the Hawk Notch tools really free?
Short answerYes. Every tool is free, needs no sign-up or email, and runs in your browser, so the numbers and text you enter are never sent to Hawk Notch or anyone else.
How current are the fees and rules the tools use?
Short answerEach tool shows the date its rules were last checked and links the Amazon, KDP or TikTok Shop page each rule comes from. They were all checked on 3 November 2026, including the 75-character Amazon title limit, the KDP royalty changes of June 2025 and July 2026, and TikTok Shop's Account Health Rating from July 2026.
Who builds these tools?
Short answerHawk Notch, an Amazon marketing agency for Amazon sellers, KDP authors and TikTok Shop brands. They are the same calculations the team runs in client audits, opened up for anyone to use.
Want the numbers run on your own account?
A call where we look at your account together and show you what's holding it back.
- Keywords and search terms you rank for, and the ones you miss
- Ad campaign structure and where spend is wasted
- Listing copy, images and A+ content against competitors
