About Calculator Mine
Calculator Mine is a free collection of financial calculators for everyday money decisions: buying a car, taking out a mortgage, growing savings, valuing an investment or comparing business projects.
What you will find here
Each calculator gives you a clear answer first, then explains it in plain words, with a chart and a full schedule you can download. Every page also explains the formula behind the numbers and walks through an example, so you can check the result and understand it.
How the calculators work
- Calculations run in your own browser. The numbers you type are not sent to us or stored anywhere.
- Nothing to sign up for and no limits on use.
- The Share Results link contains your inputs, so anyone you send it to sees the same calculation.
Accuracy
We test every calculator against worked examples and standard financial formulas. Results are still estimates: lenders round differently, fees and taxes vary, and real rates change. Use the results for planning and check important decisions with your lender or a qualified professional. See our Disclaimer for details.
How the site is funded
The calculators are free because the site shows advertising. Ads are clearly labelled and kept away from the calculator inputs and buttons.
Get in touch
Found a mistake, or want a calculator we don't have yet? Use the message form on our Contact page. We read every message.