India's free, no-nonsense calculator hub — built by an independent maker who believes finance should be accessible to every Indian.
Fynx is a collection of 80+ free, accurate calculators built specifically for Indians. From calculating EMI on your home loan to figuring out tax under the new regime, from BMI to CGPA — if it's something an Indian needs to calculate, you'll find it here.
No signup. No paywalls. No "premium" tier. No annoying popups. Just clean, fast, accurate calculators that work on any device.
Fynx started as a personal frustration. I was trying to calculate the EMI for a home loan and bounced between 5 different sites — half wanted my phone number, the others showed ads bigger than the calculator itself. None of them got the math right under the new tax regime introduced in 2025.
I'm an independent maker who builds things with modern AI-assisted tools. I started building Fynx as a weekend project. It grew because every time I needed a calculator, I added it here. Then friends started using it. Then their friends.
The goal stays the same: fast, accurate, free, forever. If a calculator on Fynx ever gives you a wrong answer, that's a bug, and I want to know about it. Tell me and I'll fix it.
Built with Indian rupees, tax slabs (FY 2025-26), GST rates, PPF/EPF rules.
Static HTML, no frameworks. Loads in under 1 second even on 3G.
All calculations happen in your browser. Nothing leaves your device.
Tax/EPF/PPF formulas cross-checked against official sources & government rules.
Phone, tablet, laptop, smart fridge. Mobile-first design.
Default, Dark Mode, and Saffron India 🇮🇳 — pick what you like.
Fynx is built with pure HTML, CSS, and vanilla JavaScript. No React, no Vue, no jQuery, no libraries. This means:
Fynx is funded by unobtrusive ads (Google AdSense). That's it. We don't sell your data, we don't have hidden affiliations, we don't push you toward specific banks or mutual funds. The calculators are completely neutral.
If ads bother you, use an ad blocker — we honestly don't mind. Fynx exists because it's useful, not to maximize ad clicks.
Fynx is hosted on Cloudflare Pages (free tier), uses Formspree for the contact form, and Google Analytics 4 for understanding traffic patterns. The entire site is open in spirit — view any page's source code to see how it works.
The calculators on Fynx are for informational purposes only. While we work hard to ensure accuracy, you should always consult a qualified Chartered Accountant or Financial Advisor for important financial decisions. Tax laws, interest rates, and regulations change frequently.
We are not affiliated with any bank, NBFC, mutual fund company, or government body. Fynx is an independent project.