About Calculix
Calculix exists because getting a straight answer about money in India is harder than it should be. Is that margin real once GST is settled? What actually lands in your account after Amazon takes its cut? How much of your CTC will you ever see? What is the advance tax instalment due next month?
Thirty-four calculators, covering GST, income tax, TDS, capital gains, depreciation, audit thresholds, salary, provident fund, gratuity, loans, deposits and investments.
Every result shows its working
You get the number, and you get the steps behind it — which slab was applied, which condition bound the answer, which cap was hit. A calculator that shows only a total asks you to trust it. One that shows its steps lets you check it against your own books.
How the numbers stay right
Tax slabs, GST rates, statutory ceilings and thresholds are stored as editable settings, never buried in code. When a Finance Act changes a slab or a notification changes a late fee, it is corrected in minutes rather than waiting for a release.
The calculation engines are tested against hand-computed examples — known answers worked out on paper first, then checked against the code. Twice during development a test failed and the engine turned out to be right; the expectation was wrong. That is what the tests are for.
Free, and honestly so
Every calculator is free, without limits, without a sign-up wall. Advertising pays for it. A paid membership removes the advertising and extends saved history — it does not unlock a single extra calculator or change any result, and it never will.
Who built this
Calculix is designed and developed by AjonTec, the technology brand of Dream Blend Solutions Private Limited — an ISO 9001:2015 certified, Startup India recognised software company based in Patna, Bihar, building custom software, websites and mobile applications for businesses across India.
More at ajontec.com.
Found something wrong?
If a figure looks incorrect, tell us at info@calculix.in. We check accuracy reports the same day — a calculator people cannot trust is worse than no calculator at all.