They haven’t been produced in decades, but [Chris Chung] has used some open source code to create DIY hardware version of the HP-41 Reverse Polish Notation (RPN) calculator. The open source code ...

If you like Nixie tubes and/or DIY calculators, checkout this interesting talk from the HP Handheld Conference in Orlando last month by [Eric Smith] from Brouhaha and [John Doran] from Time ...

See how your savings and investment account balances can grow with the magic of compound interest. Many, or all, of the products featured on this page are from our advertising partners who ...

Convert hundreds of different oilfield units of measurement using the calculator below. You can also bookmark this page or learn about the units of measurement that can be converted.

In such cases, a date calculator is your best bet. Avoid cumbersome calculations and measure percentage changes, percentage difference between two values instantly with this easy-to-use percentage ...

If you’ve ever wondered how much of your monthly payment will go toward interest and how much will go toward principal, an amortization calculator is an easy way to get that information.

So the shocking discovery of an apparently rogue HP-12C has sent tremors through the calculator aficionado world.… The HP-12C ...

Most people need a mortgage to finance a home purchase. Use our mortgage calculator to estimate your monthly house payment, including principal and interest, property taxes, and insurance.

Use this free savings calculator to understand how your money can grow over time. When you put money in a savings account, the interest you earn builds on itself.

Produced by ElevenLabs and News Over Audio (NOA) using AI narration. I worry that the calculator we’ve known and loved is not long for this Earth. This month, when I upgraded my iPhone to the ...