Polar to Cartesian Coordinates
Enter a polar coordinate (r, θ) and choose whether θ is in degrees or radians. The calculator applies x = r·cos(θ) and y = r·sin(θ) to get the Cartesian coordinates, with the degree-to-radian conversion shown when needed.
Frequently asked questions
Can the radius r be negative?
Yes. A negative radius reflects the point through the origin, so (−r, θ) equals (r, θ + π).
What units should I use?
Either — choose Degrees or Radians on the unit selector and the calculator converts internally before applying cos and sin.
Is this the inverse of the Cartesian-to-polar tool?
Yes. Converting (x, y) → (r, θ) and back returns the original point, up to the floating-point precision of the trig calls.