● 10+ tools · updated 2026
Numbers, sorted.
Numbers, sorted.
Instantly.
Free calculators and converters for the math you actually run into — loans, investments, health metrics, dates and everyday conversions. Nothing to install, nothing to sign up for.
Live demo — Compound Interest
₹10,000 invested today
Annual return10%
Time period10 yrs
Future value
₹25,937
₹25,937
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Built for the moment you need an answer, not an account.
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Every calculation runs in your browser — no server round-trip, no waiting, no page reloads.
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Each tool documents the exact formula it uses, so you can check the math yourself.
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Frequently asked questions
Yes. Every calculator and converter on ToolHub is free, with no usage limits and no account required.
Each calculator uses the standard published formula for that calculation (shown on the tool's page). Results are estimates for planning purposes — for binding financial or medical decisions, confirm with a qualified professional.
No. Calculations run entirely in your browser using JavaScript. Nothing you type is sent to a server or saved by us, other than your last few tools in your own browser's local storage.
Yes — every tool is fully responsive and designed mobile-first, so it works the same on phones, tablets and desktops.