Distance Calculator now supports locations worldwide! Distance calculations are based on the great circle distance between points, and do not account for differences in elevation. Names and locations used in this application are from the Geographic Names Information System (GNIS), the federal standard for geographic nomenclature, developed for the U.S. Board on Geographic Names (BGN) by the U.S. Geological Survey (USGS), and BGN database of foreign geographic feature names. No attempt has been made to supplement those names with others that may be in common use.