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AMZCalc - FBA & Inbound Fee Calculator

Chrome extension by doublesheng · Lifestyle · Shopping

A Chrome extension in Lifestyle · Shopping with 4 users, barely installed. Audience over the last 30 days: +1.

Specific sites only: 4 match patterns.

What the developer says, and 3 screenshots

Loading from the Chrome Web Store. Open the listing if it does not appear.

Users
4
Rating
not rated yet
Users, last 30 days
+1
Version
1.1.0
Updated in the store
2026-09-21
Published
2026-08-25
Manifest
V3
Browser access
2 permissions, 4 site patterns

How it has moved

Users
+1 since 14.10
3-6 · 16 readings
  1. 2026-10-164
  2. 2026-10-183
  3. 2026-10-204
  4. 2026-10-213
  5. 2026-10-234
  6. 2026-10-283
  7. 2026-10-294
  8. 2026-10-303
  9. 2026-11-014
  10. 2026-11-046
  11. 2026-11-065
  12. 2026-11-075
  13. 2026-11-084
  14. 2026-11-105
  15. 2026-11-114
  16. 2026-11-134
Users
+1 since 01.09
0-6 · 23 readings
2026-09-22: released 1.1.0
  1. 2026-09-013
  2. 2026-09-050
  3. 2026-09-083
  4. 2026-09-130
  5. 2026-09-164
  6. 2026-09-215
  7. 2026-10-083
  8. 2026-10-164
  9. 2026-10-183
  10. 2026-10-204
  11. 2026-10-213
  12. 2026-10-234
  13. 2026-10-283
  14. 2026-10-294
  15. 2026-10-303
  16. 2026-11-014
  17. 2026-11-046
  18. 2026-11-065
  19. 2026-11-075
  20. 2026-11-084
  21. 2026-11-105
  22. 2026-11-114
  23. 2026-11-134

A dot marks a day the store showed a different number. Between them the line carries the last one forward: we read every listing up to 2 times a day and record a point only when something moves. History beyond ninety days is in the app.

What it can reach

Specific sites only: 4 match patterns.

  • *://*.amazon.com/*
  • *://*.amazon.co.uk/*
  • *://*.amazon.de/*
Show the remaining 1
  • *://*.amazon.co.jp/*
  • Act on the current tab, but only after you click it activeTab
  • Open a panel beside the page sidePanel

The full permission history for this extension

Version history

  1. Version 1.1.0

What changed recently

  1. Package size changed
  2. Store description rewritten
  3. Released version 1.1.0 (was 1.0.0)
Show the remaining 1
  1. Store description rewritten

The publisher

doublesheng publishes 2 listings we track, 7 users between them.

  1. Etsy Profit Compass (EtsyCalc) doublesheng · Lifestyle · Shopping · published 2026-09-23 3 users (last published figure)

Like this one

Listings the catalog judges closest in what they say they do.

  1. FBA Profit Calculator — NetMargin Describes nearly the same job, smaller audience 3 users
  2. FBA Profit Calculator (Free) by Gorilla ROI Describes nearly the same job, smaller audience 3 users ★ 5.0
  3. FBA Profit Calculator Describes nearly the same job, smaller audience 3 users (last published figure)
  4. Amazon FBA Profit Lens Describes nearly the same job, smaller audience 14 users
  5. FBA Profit Calculator - Prep Fees & Shipping Describes nearly the same job, smaller audience 9 users

The top 5 only. The full comparison, with why each one is close, is on the alternatives page; ranking a whole neighbourhood by your own criteria is in the app.

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The badge shows the audience and rating from our last pass over the store and links back to this page.

Users and rating on Ext Ops Panel

Markdown

[![Users and rating on Ext Ops Panel](https://extops.dev/extensions/hklnlfhhhhijleffgahcgmfeckggkjck/badge.svg)](https://extops.dev/extensions/hklnlfhhhhijleffgahcgmfeckggkjck)

HTML

<a href="https://extops.dev/extensions/hklnlfhhhhijleffgahcgmfeckggkjck"><img src="https://extops.dev/extensions/hklnlfhhhhijleffgahcgmfeckggkjck/badge.svg" alt="Users and rating on Ext Ops Panel" height="20"></a>

Figures come from our own regular passes over the public Chrome Web Store listing, last read on . The store last changed these figures on 2026-11-11. We publish no contact details for extension developers.

Where the data comes from: how the catalog is built