VS Code
CodePen
GitHub
Node.js
RegExr
JSFiddle
CodeSandbox
Free ebook for the JS Beginners

SellerSum
ProfitCalcu
ProfitHelm
Profit Per Order
ProfitCalcTools
Listmargin
FBA Calculator
Free calculators for ecommerce, SaaS, and marketing. Calculate profit, ROI, fees instantly.

Which is more popular?
Based on our record, Eloquent JavaScript seems to be more popular. It has been mentioned 218 times since March 2021.
Website, pricing, platforms and company facts side by side.
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EJS
Eloquent JavaScript
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| Website | eloquentjavascript.net | ecomcalctools.com |
| Pricing | ||
| Company | — | 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.

No description of Eloquent JavaScript yet.
Free suite of 46 online calculators for ecommerce, marketing, SaaS, finance, and payment processing. Includes Amazon FBA fee calculator, Shopify profit margin calculator, ROAS, CAC, LTV, churn rate, Stripe fee calculator and more. Updated for 2026.
What each product offers, as listed by its team.

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Overall verdict
Why this product is good
Recommended for
Overall verdict
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Walkthroughs and reviews on video.
Eloquent JavaScript A Modern Introduction to Programming 3rd Edition by Marijn Haverbeke review
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How often each product is chosen within a category, 0–100% relative to the other.

Share your experience with using Eloquent JavaScript and EcomCalcTools. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.

If you haven’t read Eloquent JavaScript , go check it out. It’s one of my all-time favourite programming books — hands down. - Source: dev.to / about 1 year ago
Videos, blogs, text-based teachings, YouTube project-based learning, books, and the like are all examples of various methods and mediums of acquiring skills, especially in the software engineering industry. As I continue to navigate... - Source: dev.to / almost 2 years ago
Seconded. I won't recommend it and no one I know has recommended it for a decade. It's hard for someone who doesn't know JS to know which parts has changed and is no longer the way to do things. https://github.com/getify/You-Dont-Know-JS... - Source: Hacker News / about 2 years ago
Tracking EcomCalcTools since Apr 2026.
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Build and debug modern web and cloud applications, by Microsoft
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Free fee & profit calculators for eBay, Etsy, PayPal, Stripe, Square and resale marketplaces — updated whenever fees change
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A front end web development playground.
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Stop guessing your margins. Calculate true net profit after every platform fee, shipping cost & tax. Free calculators for Etsy, Amazon FBA, eBay, Shopify, Alibaba & AliExpress
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Originally founded as a project to simplify sharing code, GitHub has grown into an application used by over a million people to store over two million code repositories, making GitHub the largest code host in the world.
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Free Shopify profit calculator with real-time P&L tracking. See true profit after COGS, fees, and ad spend.
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