Cartesian to Polar Converter - Free Online Calculator | yourcalculator.app
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r = √(x² + y²), θ = atan2(y, x)

Cartesian to Polar Converter

Convert rectangular coordinates (x, y) to polar (r, θ) with quadrant detection and vector magnitude.

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Formula & Mathematical Method

This calculator uses standard deterministic mathematical algorithms to process user inputs in real time. Calculations are performed client-side for maximum speed and privacy.

Reviewed by Analytic Geometry Panel
Checked for AccuracyLast Reviewed: August 2026

Cartesian to Polar Coordinate Transformation

Theoretical background and practical computational guidance

Converts orthogonal (x, y) coordinates into polar radius r and angle θ.

Radius Calculation: r = √(x² + y²).

Angle Calculation: θ = atan2(y, x), automatically identifying quadrant position (Q1, Q2, Q3, Q4).

Cartesian to Polar FormulaMathematical Standard
r = \sqrt{x^2 + y^2}, \quad \theta = \text{atan2}(y, x)

Determines magnitude r and direction angle θ from x and y offsets.

Worked Calculation Walkthrough & Analytical Steps

To evaluate a typical problem using the Cartesian to Polar Converter, identify your known baseline inputs, convert all measurements to congruent units, and apply the governing formula sequentially. Below is a structured breakdown of the computational workflow:

  1. Data Ingestion & Unit Harmonization: Enter the primary parameters into the input fields. If working with mixed metric or imperial dimensions, use the unit selector above to align scales.
  2. Intermediate Term Evaluation: The algorithm evaluates inner parentheses, rate exponents, and coefficient ratios in strict compliance with mathematical precedence.
  3. Final Transformation & Precision Rounding: The final numerical figure is determined, formatted to user-selected decimal precision, and mapped against relevant diagnostic or diagnostic thresholds.

Key Insights & Operational Tips

  • r is always non-negative (≥ 0).
  • Quadrant detection correctly handles negative x and y inputs.

Frequently Asked Questions (FAQs)

Authoritative answers to common computational and formula questions

r = √((-3)² + 4²) = 5. θ = atan2(4, -3) ≈ 126.87° (Quadrant II).

Authoritative Citations & Institutional References

Disclaimer & Methodological Transparency Notice

Supports metric and imperial length units for magnitude r.