Math & Geometry

3D Distance Calculator

Calculate the distance between two points in 3D space.

Enter the (x, y, z) coordinates of two points to calculate the straight-line distance between them in three-dimensional space.

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Distance

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How to Use This Tool

  1. Enter the coordinates of your two points.
  2. Leave z-coordinates at 0 for a standard 2D distance calculation.
  3. Click Calculate for the straight-line distance.

The 3D Distance Formula

Distance = √[(x₂−x₁)² + (y₂−y₁)² + (z₂−z₁)²]

This extends the familiar 2D distance formula (itself derived from the Pythagorean theorem) into three dimensions by adding a third coordinate axis.

Using This for 2D Problems

Simply leave both z-coordinates at 0 to reduce this to the standard 2D distance formula between two points on a plane.

Applications

Frequently Asked Questions

Can I use this for simple 2D distance calculations?

Yes — leave both z-coordinates at 0, and the formula reduces exactly to the standard 2D distance formula between two points on a plane.

This calculator is provided for general informational and estimation purposes only. Results should not be treated as professional financial, tax, legal, medical, or engineering advice. Always verify critical calculations with a qualified professional or official source before making decisions.