Do you want to learn something about a hypothetical way to time travel to the future? Or perhaps, have you ever wondered what it would take to create a black hole? Well, this special calculator explains both of the concepts and even lets you play around with the mathematical circumstances behind these possibilities!

Specifically, this calculator explains the concept of kinematic time dilation (a concept conceived by Albert Einstein's theory of special relativity), and it lets you plug in different values into the special time dilation formula so that you can see how far into the future you could travel by moving at certain speeds for certain amounts of time!

This calculator also explains what it would take to create a spherically symmetric static non-rotating black hole, and it lets you play with the formula to determine how your chosen amount of mass could become a black hole!