About

CalcPros is a free collection of investment and financial calculators. The goal is simple: give you a clear number, quickly, without sign-ups, pop-ups or jargon.

What makes this different

  • Everything runs in your browser. Your amounts, salary figures and goals are never uploaded anywhere. There is no account and no tracking of what you calculate.
  • Formulas are shown, not hidden. Each calculator page displays the exact formula used and a worked example, so you can verify the result by hand.
  • Built for phones first. Most people check these numbers on a phone, so the layout, buttons and charts are designed for a small screen and then scaled up.
  • Honest about limits. Where a result depends on an assumption — an expected return, an inflation rate, a tax rate — we say so and let you change it.

What we do not do

  • We do not give personalised financial advice.
  • We do not show live market, gold or crypto prices. Every price used is one you type in.
  • We do not promise returns. Market-linked projections are illustrations, not forecasts.

How the calculators are built

Every figure on this site comes from a shared library of standard time-value-of-money formulas — future value, annuity and annuity-due, amortisation, present value. Nothing is invented and no calculator carries maths of its own, so the same formula cannot drift between two pages.

Those formulas are covered by an automated test suite that runs before every release. The expected values in it were worked out independently rather than copied from the code, so if a formula is ever changed by mistake the tests disagree instead of silently publishing a wrong number. Each calculator page also shows the formula it used and a worked example, so you can check the arithmetic by hand.

Where results are estimates

Anything involving a future return, an inflation rate or a tax rate is an estimate built on an assumption you supply. A SIP projection at 12% is not a forecast; it answers the question "what if returns averaged 12%?" Deposit and loan calculations are far more predictable, because the rate is contractual — though banks may round differently or add fees this site cannot know about.

Accuracy and corrections

If you believe a calculation is wrong, please tell us. Include the calculator name, every value you entered, the result you saw and the result you expected — that is usually enough to reproduce and fix an issue quickly. Corrections are welcome and taken seriously; a calculator that is quietly wrong is worse than no calculator.

Please verify anything important

These tools are a starting point for thinking, not a substitute for advice. For decisions that matter — a home loan, a retirement plan, a large investment, anything with tax consequences — check the numbers against your bank, fund house or a qualified professional registered to advise in your country before acting on them.

Disclaimer: These calculators are for educational and informational purposes only. Results are estimates based on the inputs provided and should not be considered financial, investment, tax, or legal advice.