At heart, measuring a mountain relies on basic ninth-grade math. To calculate the elevation of a mountain, scientists would measure the distance between two points on the ground and then measure ...

By understanding these methods and tools, you can accurately measure your altitude using your phone, whether you're an outdoor enthusiast or simply need to know your elevation for other purposes.

How do we measure elevation now? The program behind this new report was not particularly interested in peak rankings. Started in 2007, the idea was to create a new baseline for sea level nationwide.