About lemmatools
Every answer, instantly.
What is lemmatools?
lemmatools is a collection of 67 free utility tools covering Finance, Pay, Health, Cooking, Everyday maths, Unit Converters, and Tech & Career. Every calculation runs instantly in your browser — no page reloads, no servers, no waiting.
We built lemmatools because the web is full of calculators buried under ads, paywalls, and slow-loading interfaces. Our tools are free, fast, and work offline after the first load.
Our principles
Instant results
All formulas run as browser JavaScript. Results appear in under 1ms with no Calculate button needed.
No signup required
Every tool works without an account, email, or phone number. Ever.
Works offline
Once loaded, lemmatools works without internet via a Progressive Web App service worker.
Built for India
INR formatting, IT Act 2025 tax slabs, lakh/crore notation, and India-specific defaults throughout.
67
Free tools
7
Categories
0
Signups needed
What we cover
Who is behind lemmatools?
lemmatools is built and maintained by a small independent team that researches Indian personal-finance rules from primary sources — the Income Tax Department, RBI, EPFO, PFRDA, SEBI and India Post — and turns them into calculators anyone can use. Every finance page names its author, cites its official source, and shows the date it was last reviewed.
Why trust the numbers? Because they are checkable: each formula is a pure function verified by unit tests against published known values, every rule links to the government page it came from, and corrections ship within days of a budget or rate change. Read more about our process on the authors page.
Contact & Feedback
Found a bug or have a tool suggestion? Open an issue on GitHub.