Is this the same as driving distance?

No. The calculator returns the straight-line (great-circle) distance over the surface of the Earth. Driving distance follows roads and is almost always longer — sometimes by a lot in mountainous or coastal areas.

What is the Haversine formula?

It is a standard formula for computing the shortest distance between two points on a sphere. Given two latitude/longitude pairs, it calculates the great-circle distance — the curved path an airplane would fly between them.

How accurate is the result?

Typically within about 0.5%. The Haversine formula assumes the Earth is a perfect sphere, while in reality it is slightly flattened at the poles, which introduces a small error.

Can I see the distance in miles as well as kilometers?

Yes. Every result is shown in both kilometers and miles, so you can use whichever unit your project or audience expects.

Point to Point Distance Calculator | Measure Distance Between Coordinates

Point to Point Distance Calculator — Measure the Straight-Line Distance Between Two Coordinates