If you’re looking to add a useful life skill to your metaphorical tool kit, consider learning how to calculate square footage. There are countless situations when calculating how many square feet are ...

When you buy a new home, or sell your current one, thinking about how to measure its square footage probably isn’t top of mind. And while it may seem like an inconsequential metric, it’s one of the ...

TIOBE Index for February 2026: Top 10 Most Popular Programming Languages Your email has been sent February’s TIOBE Index shows a leaderboard that looks steady at first glance, but small shifts beneath ...

Ever wanted to know how engineers made their calculations before digital calculators were on every workbench? [Richard ...

When the IBM PC was new, I served as the president of the San Francisco PC User Group for three years. That’s how I met PCMag’s editorial team, who brought me on board in 1986. In the years since that ...

Social Security uses your top 35 income years, adjusted for inflation, to calculate benefits. Claiming benefits before full retirement age leads to permanently reduced monthly payments. Delaying ...

Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Vikki Velasquez is a researcher and writer ...

Self-employment tax is a mix of Social Security and Medicare taxes. Use our calculator to estimate what you owe. Many, or all, of the products featured on this page are from our advertising partners ...