Many developers don't think about calculators until they need one. Whether it's debugging formulas, checking statistics, verifying algorithm outputs, or working through engineering calculations, having a reliable calculator nearby can save time.
As someone who frequently works with numbers, I've found that browser-based graphing calculators are especially useful because they don't require any installation and are accessible from any device.
A few situations where I use an online graphing calculator:
Testing mathematical formulas
Verifying calculations during development
Exploring functions and graphs
Working on educational or STEM-related projects
Double-checking algorithm results
One tool I've been using recently is a browser-based TI-84 calculator emulator:
It provides a familiar TI-84 experience directly in the browser, which is convenient when you don't have physical hardware available.
What tools do you use when working with mathematical calculations during development? Do you prefer built-in IDE features, spreadsheets, dedicated software, or online calculators?
I'd be interested to hear what works best for other developers.