Coordinate Converter

Convert between Cartesian (rectangular) and polar coordinates.

Cartesian (x, y) → Polar (r, θ)

3D Coordinate Conversion

Cartesian (x, y, z) ↔ Spherical (r, θ, φ)

Conversion Formulas

Cartesian → Polar：r = √(x² + y²), θ = atan2(y, x)
Polar → Cartesian：x = r·cos(θ), y = r·sin(θ)
Cartesian → Spherical：r = √(x²+y²+z²), θ = atan2(y,x), φ = acos(z/r)

Usage Instructions

Features

Online coordinate converter supporting 2D Cartesian ↔ Polar and 3D Cartesian → Spherical conversions, with automatic step-by-step calculations.

Steps

Choose a conversion tab (Cartesian → Polar or Polar → Cartesian) → Enter the corresponding coordinate values → View the result and calculation steps in real time; for 3D conversion, enter x, y, z in the card below.

Notes

Angles are in degrees (°) and results keep 6 decimal places; all calculations run locally in your browser and no data is uploaded.