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Herminox
Free Amazon calculators — no signup, runs in your browser
Herminox is six free Amazon calculators for sellers and buyers. Everything runs in your browser — no signup, no email gate, inputs never leave your device. Sellers get FBA profit (2026 fees + fuel), ACoS/TACoS breakeven with max CPC, and inventory recovery: units to get PO cash back after fees. Buyers get unit price, cost per use, and a return tracker with holiday windows and locked capital. Coaches can embed widgets. Independent — not affiliated with Amazon. Confirm fees with Seller Central.
Hey Product Hunt 👋 I’m the maker of Herminox.
I got tired of watching people commit to inventory, ads, or “deals” before running the math — and then discovering the margin was fiction or the return window already closed.
So I built six free calculators that run entirely in the browser:
• FBA Profit — referral + fulfillment + 2026 fuel surcharge
• ACoS / TACoS breakeven + max CPC
• Inventory — units to recover PO cash (sell − fees, not profit)
• Unit price · Cost per use · Return / locked-capital tracker
About Herminox on Product Hunt
“Free Amazon calculators — no signup, runs in your browser”
Herminox was submitted on Product Hunt and earned 3 upvotes and 1 comments, placing #156 on the daily leaderboard. Herminox is six free Amazon calculators for sellers and buyers. Everything runs in your browser — no signup, no email gate, inputs never leave your device. Sellers get FBA profit (2026 fees + fuel), ACoS/TACoS breakeven with max CPC, and inventory recovery: units to get PO cash back after fees. Buyers get unit price, cost per use, and a return tracker with holiday windows and locked capital. Coaches can embed widgets. Independent — not affiliated with Amazon. Confirm fees with Seller Central.
On the analytics side, Herminox competes within Productivity, E-Commerce and Finance — topics that collectively have 706.1k followers on Product Hunt. The dashboard above tracks how Herminox performed against the three products that launched closest to it on the same day.
Who hunted Herminox?
Herminox was hunted by Vigen Ghulyan. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of Herminox including community comment highlights and product details, visit the product overview.
Vigen Ghulyan