3D Distance Calculator

About this calculator

This calculator finds the straight-line distance between two points in 3D space using the extended Pythagorean theorem, d = √((x₂−x₁)² + (y₂−y₁)² + (z₂−z₁)²), the 3D generalization of the standard 2D distance formula.

It's used in game development and 3D graphics to check collision distances or line-of-sight, in engineering and CAD work to measure distances between components in a model, and in physics and astronomy problems that place objects by (x, y, z) coordinates. Because it works with any consistent unit (meters, pixels, light-years), the same formula scales from a robotics simulation to plotting star positions.