Distance Calculator
Distance between two points (x1, y1) and (x2, y2).
Worth Knowing
The distance between two points is the Pythagorean theorem in disguise: the straight-line gap is the hypotenuse of a right triangle whose legs are the horizontal and vertical differences. This is why the formula squares those differences, adds them, and takes the root. It gives the shortest 'as the crow flies' distance on a flat plane — real travel distance along roads is always longer, and on the curved surface of the Earth a different (great-circle) formula applies.
How to Use
- Enter x₁ into the first field of the Distance Calculator.
- Fill in the rest: y₁, x₂, y₂.
- Your result appears instantly as you type — there's no submit button or page reload.