Eternexa exists to do one thing well: give you a clear estimate for a real money question — and then get out of your way. No motivational filler, no dark patterns, no sign-up. Just tools that work.
What we build
A growing library of financial calculators made for salaried Indians — take-home salary, income tax (old vs new regime), SIP, EMI, and more on the way. The website uses the same calculation engine as the Android app we are building, so the underlying maths stays consistent.
How your inputs are used
On this website, every calculation runs inside your browser. The salary, loan and investment figures you type appear in the page URL so you can reopen or share a result. Visiting or sharing that URL can disclose the values in it. We do not ask you to sign up. See our privacy policy for the details.
Accuracy is sacred
Tax and finance rules change every year. We track the Union Budget and update our figures for the current financial year (FY 2026-27), cross-checking against official sources. If you ever spot something that looks off, tell us at eternexa@gmail.com.
Official information sources
The official sources and calculator methods page covers income tax, provident fund, gratuity, NPS, small savings, GST and supported state professional-tax presets. Each calculator also displays its relevant references and the limits of the estimate.
- Income Tax Department — incometax.gov.in/iec/foportal/
- EPFO — provident fund — epfo.gov.in/
How we keep it free
We may show clearly labelled advertising to help keep the calculators free. You can use every calculator without a subscription or premium tier.