# Distance Calculator

Have you ever wanted to calculate the distance from one point to another, or the distance between cities?

Have you ever wanted to calculate the distance from one point to another, or the distance between cities?

2 points⌵

2D⌵

Before we get into how to calculate distances, we should probably **clarify what a distance is**. The most common meaning is the /1D space between two points. This definition is one way to say what almost all of us think of distance intuitively, but it is **not the only way** we could talk about distance. You will see in the following sections how the concept of distance can be extended beyond length, in more than one sense that is the breakthrough behind Einstein's theory of relativity.