About TheCalculatorVault

TheCalculatorVault is a growing collection of free online calculators. We started with finance — where small modelling errors cost real money — and we are expanding across loans, health and everyday math. Every tool is built to be quick to use, mobile-friendly, and correct to the last decimal.

What makes us different

• Accuracy first. Our math runs on a tested engine — the same numbers you would get from a spreadsheet or a bank statement, not a rough approximation.
• Clear results. Headline figures, charts and full period-by-period breakdowns, so you can see exactly how a number was reached.
• No sign-up, no paywall. Everything is free to use and shareable with a single link.

Available now

• Compound Interest Calculator — Future value, total interest and APY with optional regular deposits, withdrawals and a full breakdown.
• Simple Interest Calculator — Final balance, interest accrued and end date using the classic I = P × r × t formula, with optional deposits and withdrawals.
• Daily Compound Interest Calculator — Future value with interest compounded daily — including weekend exclusion, partial reinvestment and optional deposits or withdrawals.
• PPF Calculator — Public Provident Fund maturity value, total interest and a year-by-year breakdown, with the ₹1.5 lakh yearly limit and 15-year tenure.

More calculators are on the way. Have a request? Tell us.

A note on accuracy

Our calculators are provided for general information and illustration only. They are not financial, medical, legal or tax advice. Always confirm important decisions with a qualified professional. See our Terms for details.