Amazon FBA Calculator
Referral + FBA fees, profit per unit and monthly profit for Amazon sellers.
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Tools we might demo
Free calculators and converters that run in your browser, plus our shortlist of AI tools for creators, freelancers, and indie builders. The directory below is a research / demo queue — not a ranking and not a storefront. Links go to official sites only.
No partner links yet. Affiliate / referral URLs are TBD and will be labeled on-page + listed on Disclosures when live. No checkout on this site.
Free calculators & converters
Every tool below runs entirely in your browser — no signup, no upload. Built for sellers, tradespeople, and developers who need a straight answer, not a sales pitch.
Etsy Fee Calculator
Listing + transaction + payment fees and your true take-home on every Etsy sale.
eBay Fee Calculator
Final value fee, per-order fee and net profit for eBay sellers.
Shopify Profit Calculator
Per-order and monthly profit after plan, payment fees and ads.
Mercari Fee Calculator
Payment processing fee and net profit for Mercari sellers.
Poshmark Fee Calculator
20% commission or $2.95 flat fee, and your net profit per sale.
Twitch Bits to USD
Bits ↔ dollars, cheer cost, and progress to the $50 payout threshold.
Roof Pitch Calculator
Pitch ratio, angle, slope % and rafter length from rise and run.
Board Foot Calculator
Board feet from lumber dimensions, plus total volume and cost.
Concrete Bags Calculator
Bags needed for any slab, by bag size, with waste allowance.
Fence Material Calculator
Posts, pickets, rails and concrete for any fence, with cost estimate.
Deck Material Calculator
Decking boards, joists, footings and screws for any deck, with cost estimate.
Mulch Calculator
Cubic yards, bags and weight for any bed, plus bulk vs bagged cost.
Tile Calculator
Tile count, boxes and cost for floors and walls, with waste factor.
PDF Bank Statement to CSV
Turn a PDF statement into CSV in your browser. No upload, no sign-up.
STL to G-code
Basic in-browser slicer: STL in, printable G-code out. No upload.
YAML to JSON
YAML in, formatted JSON out. In-browser, private, free.
CSV to JSON
CSV in, JSON array out. Quoted fields, custom delimiters, private.
SVG to PNG
SVG in, PNG out at any size. In-browser, private, free.
JSON to CSV
JSON array in, spreadsheet-ready CSV out. Flattens nested data.
Tool cards
Supabase security checklist
RLS, getClaims/getUser vs getSession, secret keys, storage buckets and OAuth referral loss for Supabase + Next.js and Lovable apps, plus a two-account A/B test.
Daily true-profit report (sample)
What a done-for-you morning profit email looks like for Shopify + Square/Clover shops: sales, refunds, product cost, fees and ad spend in one number. Example data, read-only access, reconciled daily.
Claude
Long-context writing, analysis, and coding assistant for drafts that need careful editing.
Partner link TBD / disclosed when live
ChatGPT
General-purpose chat and multimodal helper for ideation, outlines, and everyday prompts.
Partner link TBD / disclosed when live
Cursor
AI-native code editor for shipping small apps and scripts with agent-style edits.
Partner link TBD / disclosed when live
Notion AI
Notes-and-docs workspace with AI for summaries, rewrite, and lightweight knowledge bases.
Partner link TBD / disclosed when live
Perplexity
Answer engine with cited web sources — useful for research briefs before you write.
Partner link TBD / disclosed when live
Descript
Edit podcast / video like a doc; useful for faceless YouTube cutdowns and overdubs. Next Lab demo: transcript→Short filler cut + honest CapCut win cases. Affiliate apply only after that demo ships — no partner URL yet.
Partner link TBD / disclosed when live · public program researched 2026-09-12 ($25/sub stated on vendor page; we have not applied)
ElevenLabs
Text-to-speech and voice cloning for narration when a human VO is not the goal.
Partner link TBD / disclosed when live
Midjourney
Image generation for thumbnails, mood boards, and visual concepts (Discord / web).
Partner link TBD / disclosed when live
Want demos first?
Join the waitlist or watch YouTube. Full honesty rules on Disclosures.