About InterestCalcHub

InterestCalcHub publishes free financial calculators for everyday decisions about saving and investing. The site is run by SavyBuild.

What we aim for

Many online calculators give a single number with no explanation. We want you to be able to see how a result was produced, check it yourself and understand its limits. Every calculator page includes:

  • the formula and the method used, written in plain language;
  • the assumptions built into the result and what it does not include, such as tax, fees and inflation;
  • original worked examples whose numbers are produced by the same code as the calculator;
  • the date the methodology was last reviewed.

How calculations are checked

Before a calculator is published, its results are tested automatically against standard textbook formulas, against an independent closed-form calculation and against edge cases such as zero values, very small and very large amounts and the longest supported time periods. The tests run before every update is published.

Independence and advertising

The site may show advertising to cover its costs. Advertisers have no influence over calculator results or the content we publish, and ads are kept visually separate from calculator controls. We do not recommend specific financial products.

Not financial advice

Our calculators and articles are for education and general information only. They do not take your personal circumstances into account. Please read our financial disclaimer and consider speaking with a qualified, licensed professional before making financial decisions.

Corrections and feedback

If you find an error or have an idea for a calculator, please contact us. We review every report and correct mistakes promptly.