Pevlika Browser Apps

Circle Equation Calculator

Standard and general form of a circle; center and radius from either.

Runs in your browser — nothing is uploaded
Given

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How to use Circle Equation Calculator

  1. Enter your values — the unit for each field is shown next to it.
  2. The result updates instantly as you type.
  3. Copy the results, or change inputs to compare scenarios.

Formula & assumptions

(x − h)² + (y − k)² = r²

x² + y² + Dx + Ey + F = 0 → h = −D/2, k = −E/2, r² = h² + k² − F

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