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Coordinate System Converter

Convert points between Cartesian, polar and cylindrical coordinates in one step.

Convert coordinates

Radius r: —
Angle (degrees): —
Height z: —
Angles are measured counterclockwise from the positive x axis.

How to use the Coordinate System Converter

  1. Choose which direction you want to convert.
  2. Enter the three coordinate values in the boxes.
  3. Read the converted coordinates in the result panel.

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Frequently Asked Questions

Common questions about the free online coordinate system converter.

Pick the Cartesian to polar mode, enter x and y, and the tool shows the radius r and the angle in degrees instantly.
Polar coordinates describe a point in a plane with a radius and an angle, while cylindrical coordinates add a height z for three dimensions.
The angle comes from atan2 of y and x, then it is converted to degrees and shifted into the range 0 to 360.
Yes. Switch to the polar to Cartesian mode and the tool computes x and y from the radius and angle while keeping z unchanged.
Angles are entered and displayed in degrees, measured counterclockwise from the positive x axis of the plane.
No. Every conversion runs locally in your browser, so nothing you type is ever sent anywhere or stored.
Yes. The converter is fully responsive and works on desktop, tablet and phone screens of any size.
Yes. The coordinate converter is completely free, unlimited and needs no account, sign-up or installation.

Last updated: October 10, 2026