Life & fun · alternatives · 2026

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. I built a tax calculator with JavaScript launched in 2020; newer entries below may have overtaken it.

1. 1CF
   Calculator for US individual income tax, from 1970-present▲497

   I wanted to share a simple web app I created recently, which lets you estimate income taxes owed in the US: https://taxsim.app All the calculations occur directly in the browser, and are powered by a Fortran program that has been converted to WASM using emscripten. This calculator was originally developed in the 1970s [1] by the non-profit National Bureau of Economic Research. NBER has been maintaining this F77 codebase for the last 50 years, and uses it primarily for academic research on tax policy. The Fortran source code itself is over 1MB of text, because it codifies both…

   2022 · its alternatives →

2. 2IT
   Income Tax Calculator▲64

   2015 · incometaxcalculator.net.in · its alternatives →

3. 3WB
   web-based tax sheet I've been using for the past 3 years▲5

   2025 · chuanqisun.github.io · its alternatives →

4. 4
   Quarterly Tax Calculator Bot▲130

   Quarterly tax calculation for freelancers

   2016 · its alternatives →

5. 5CT
   CryptoTrader.Tax – Tax calculator for your crypto trading▲80

   2019 · cryptotrader.tax · its alternatives →

6. 6
   Trump's "Smart" Tax Calculator▲93

   Calculate your taxes as if you paid the same as Trump

   2016 · hillaryclinton.com · its alternatives →

7. 7
   HivePayroll Calculate Income Tax▲76

   Calculate income tax on your earnings in a few simple steps

   2022 · hivepayroll.co.in · its alternatives →

8. 8IG
   I Got Tired of Calculator Sites, So I Built My Own▲58

   I’ve always found that online calculators tend to have bad UIs, especially on mobile. Most of the calculator websites I’ve come across use outdated and inconvenient ways of inputting data, or they format the results in confusing ways. I’ve noticed that fraction calculators (especially mixed fractions) are terrible to use, even on desktop. I haven’t built one of those yet, but it’s something I’m planning to tackle soon. This is a project I’ve always wanted to work on, but I’m relatively new to this space. So far, I’ve created a collection of simple calculators focused on math and finance. I’d…

   2025 · its alternatives →

9. 9AJ
   A JavaScript calculator using the latest ES6 features▲7

   2017 · calculator.portfolio.braham.biz · its alternatives →

10. 10IB
    I Built a Free Car Budget Calculator Using the 20/4/10 Rule▲5

    2024 · budgetforcars.com · its alternatives →

11. 11IB
    I built a tool to uncover hidden fees and track your 401(k). Feedback▲6

    2019 · getretire.com · its alternatives →

12. 12NS
    Notepad Style Online Calculator▲6

    2020 · type-calc.herokuapp.com · its alternatives →

13. 13TC
    Tip Calculator – A simple project I made to learn jQuery▲5

    2020 · codepen.io · its alternatives →

14. 14
    TaxesLedger▲4

    Free sales tax, VAT & GST calculators that show the math

    Jul 2026 · taxesledger.com · its alternatives →

15. 15
    I Built a Simple German Gross-to-Net Salary Calculator▲11

    I developed an intuitive, cross-platform tool to calculate net salaries in Germany. It simplifies the complexity of taxes, deductions, and social contributions while keeping a clean, minimalistic design. With straightforward functionality and clear visualizations, it helps users easily understand how their gross salary breaks down into take-home pay.

    2024 · netsalarygui.de · its alternatives →

16. 16IM
    I made a calculator builder to increase engagement and conversions▲9

    Hi HN, I am a solopreneur in the evenings and a software engineer during the day. In the past, I have created lots of calculators for my web projects and freelancing friends. These were pretty basic, but users always welcomed them. I also used currently available builders, but the problem was that they were either slow, broke on mobile devices, had nonsense page view limits, or were expensive. Some even ticked all those boxes. So I have decided to create my own, with a simple interface, and called it Creative Widgets (if it ever takes off, I plan to add more exciting stuff like charts, etc,…

    2024 · creativewidgets.io · its alternatives →

17. 17IT
    I threw together a cute JavaScript sandbox for kids▲6

    2019 · howtocodejs.com · its alternatives →

18. 18IB
    I built another calculator for iPhone/iPad that's free and ad-free▲9

    2022 · waterworld.com.hk · its alternatives →

19. 19
    Crypto Tax Calculator▲6

    Use the Sales Tax Calculator to calculate sales tax.

    2025 · geteasetools.com · its alternatives →

20. 20IB
    I built an online programming language▲8

    2023 · lineone.dev · its alternatives →

21. 21
    Roots & Receipts Tax Calculator▲2

    Know your profit and tax, in seconds. Free.

    Jul 2026 · rootsandreceipts.com · its alternatives →

22. 22SC
    Simple calculator, try urlcalc.com/1+2▲5

    2015 · urlcalc.com · its alternatives →

23. 23OS
    Open Source Taxes▲5

    2015 · opensourcetaxes.com · its alternatives →

24. 24XR
    Xcell – Reactive, spreadsheet-like calculations in JavaScript▲9

    2018 · tomazy.github.io · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →