Amazon Sellers Leave Money on the Table. Our Free Tools Help You Take It Back.
Free calculators, no-fluff guides, and honest software comparisons built for Amazon sellers who want real answers.
What do you need help with?
Pick a starting point — every path leads to practical tools and advice.
Calculate Profit
Know your exact margins after every Amazon fee before you place a purchase order.
Optimize PPC
Find your break-even ACOS, plan your ad budget, and stop burning money on campaigns.
Manage Inventory
Calculate reorder points and restock quantities so you never go out of stock.
Research Products
Score opportunities with data-driven analysis before committing to a new product.
Free Seller Tools
Calculators that help you make better decisions.
FBA Profit Calculator
Calculate real profit per unit after all Amazon fees, shipping, and cost of goods.
Break-even ACOS Calculator
Find the exact ACOS threshold where your PPC campaigns stop being profitable.
PPC Budget Calculator
Estimate your daily and monthly ad budget based on target sales and margins.
Product Research Profit Analyzer
Score product opportunities 0-100 and get a Buy / Test / Skip decision with PPC sensitivity modeling.
Inventory Reorder Calculator
Know exactly when to reorder so you never run out of stock on Amazon.
Inventory Restock Planner
Multi-SKU restock planner with stockout risk scoring and order quantity optimization.
Why use free tools first?
Before you invest in paid software, make sure you understand your numbers.
No Signup Required
Every calculator works instantly in your browser. No account, no credit card, no hidden trial.
Built on Real Formulas
Each tool uses the same math that experienced Amazon sellers apply to their own businesses every day.
Make Better Decisions Faster
Stop doing math in spreadsheets. Get instant answers so you can move on to what matters.
Start-Here Guides
Straight answers to common seller questions.
How to Calculate Amazon Profit Correctly
Stop guessing. Learn how to account for every fee and cost.
What Is Break-even ACOS?
Understand the most important metric for Amazon PPC profitability.
How Amazon Fees Affect Your Real Profit
A breakdown of FBA fees, referral fees, and hidden costs.
How to Launch a Product on Amazon FBA
Step-by-step guide from research to your first 30 days of sales.
Amazon FBA Fees Explained
Every Amazon fee broken down — the most comprehensive fee reference available.
How to Optimize Amazon PPC Campaigns
Campaign structure, bid strategy, and a weekly optimization checklist.
Amazon FBA Beginner Checklist
Everything you need before your first sale — a complete startup checklist.
Amazon Seller Glossary (80+ Terms)
Every Amazon FBA term defined — from ACOS to FNSKU to TACoS.
FBA vs FBM: Complete Guide
Compare Amazon fulfillment methods with cost analysis and decision framework.
Software Comparisons
Honest breakdowns to help you choose the right tools.
Helium 10 vs Jungle Scout
The two biggest Amazon research tools compared side by side.
Best Amazon Seller Tools for Beginners
A shortlist of tools that are worth it when you're just starting out.
Best Amazon PPC Tools
Software to help you manage and optimize Sponsored Products campaigns.
Viral Launch vs Helium 10
Product discovery specialist vs all-in-one suite — which is right for you?
Best Inventory Management Tools
Compare SoStocked, RestockPro, InventoryLab, and more.
Best Amazon Repricer Tools
Automated repricing tools — RepricerExpress, BQool, Aura, and more.
Helium 10 vs AMZScout
All-in-one powerhouse vs budget-friendly research tool — which fits your stage?
Jungle Scout vs AMZScout
Two popular product research platforms compared on features, pricing, and ease of use.
Perpetua vs Helium 10
AI-powered PPC automation vs all-in-one suite — which fits your business?
Resources & References
Checklists, glossaries, and directories you can bookmark.
Premium Templates & Tools
Professional-grade spreadsheets and dashboards built specifically for Amazon sellers. Join the waitlist to get early access and a launch discount.
Product Research Spreadsheet
Pre-built Excel template with profit scoring, competition analysis, and supplier comparison — the same sheet top sellers use.
PPC Campaign Tracker
Track ACOS, TACoS, and ad spend across all campaigns with automated weekly reports and bid suggestions.
Financial Dashboard Template
Plug in your Seller Central data and get instant P&L, cash flow projections, and inventory valuation.
Launch Playbook Bundle
Step-by-step launch checklist, keyword tracker, review request templates, and 90-day growth plan.
No spam. Just a single email when we launch.
Get seller tips that are actually useful
No spam. Just practical advice on profit, PPC, and growing your Amazon business.
Why SellerKit?
100% Free Tools
No signup, no paywall. Use every calculator instantly.
Built for Sellers
Every tool and guide is designed around real seller workflows.
No Fluff
Direct answers, real examples, and practical advice only.