The gravitational force between two objects never becomes zero, regardless of the distance between them. However, the strength of the gravitational force decreases as the distance between the objects increases. According to Newton's law of universal gravitation, the force of gravity is inversely proportional to the square of the distance between the centers of mass of the objects.
In the case of the Earth, its gravitational force extends indefinitely into space, but its influence becomes weaker as you move farther away. At great distances from Earth, the gravitational force becomes so small that it becomes negligible compared to other forces in the universe. However, it never reaches zero.
If you are referring to the point where the gravitational force of the Earth is negligible for practical purposes, it is commonly considered to be at a distance of about 1.5 million kilometers (about 932,000 miles) from the Earth's surface. This distance is often referred to as the "neutral point" or the "L1 Lagrange point," where the gravitational forces of the Earth and the Sun roughly balance each other. Objects placed at the L1 point experience a gravitational force from the Sun that is nearly equal to the gravitational force from the Earth, resulting in a stable equilibrium.