Calculators and Converters

Choose from a multitude of free financial calculators, imperial to metric converters, math calculators, health calculators and other useful tools for general use.

Whether you're looking to work out a loan repayment schedule, work out the compound interest on your savings or plan for retirement, the financial calculators are there to assist you. In addition, you can find a huge variety of different metric converters and a growing collection of math and health calculators. Please select a calculator or converter from the top menu or the selection below:

Investment value graph rising

Future Value Formula - Explained

As part of the development of my compound interest calculator, I incorporated the ability to include additional monthly deposits and deductions in calculations. In my earlier article discussing the compound interest formula, I featured a formula for the future value of a series...

VE Day announcement in 1945

How Many Days Since...?

To coincide with the launch of my new days between dates calculator, I thought we would take a look at the number of days since some of the most important events in our history took place. The 'days between dates calculator' allows you to work out the number of days, weeks and months since (or to) a...

Selected days of the year

How Many Weeks Are In a Year?

Any impatient soul counting down to their next birthday, annual holiday or festival is going to need 52 weeks' worth of patience, because that's the length of a complete year. A normal year has 365 days, which, when divided by 7 (Monday,...

Man stacking coins demonstrating compounding

Compound interest formula - explained

An in-depth look at the compound interest formula as we break down how to calculate compound interest. The concept of compound interest is that interest is added back to the principal sum so that interest is earned on that added interest during the next compounding period.

For more articles related to finance and measurements, please visit the featured articles section.

Your Comments and Suggestions

I love hearing your feedback. So, please feel free to suggest any extra units and measures for the imperial and metric conversions.

If there are any other finance calculators or converters that you feel would be a useful addition to this website, or any ideas for extra features, then please suggest those also. You can contact me here.