What calculators or digital tools do you wish existed online?

Hey everyone 👋

We recently launched Calcusense, a platform where we build simple and fast online calculators and digital tools to help people solve everyday problems quickly.

You can check it out here:
https://calcusense.com

We're planning to add many more tools based on real user needs, so I'd love to hear from the community:

What kind of calculator or quick digital tool do you wish existed online?

It could be something for finance, productivity, health, conversions, planning, or anything that saves time.

Your ideas might become the next tool we build 🚀