The distance from the ground to space is not precisely defined and can vary depending on the source and the definition of where space begins. However, the commonly accepted boundary between Earth's atmosphere and space is known as the Kármán line.
The Kármán line is located approximately 100 kilometers (62 miles) above the Earth's surface. It is named after Theodore von Kármán, a Hungarian-American aerospace engineer who first calculated this altitude to be the point where aerodynamic forces are insufficient for aircraft to generate lift.
Converting the distance to kilometers, we have:
100 kilometers
Therefore, the distance from the ground to space, as defined by the Kármán line, is approximately 100 kilometers (62 miles).