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  1. Area of a Circle Calculator

    The area of a circle calculator will compute the surface of a circle using a radius or a diameter.

  2. Circle Calculator

    Aug 1, 2025 · Use this circle calculator to find the area, circumference, radius or diameter of a circle. Given any one variable A, C, r or d of a circle you can calculate the other three unknowns.

  3. Area Of A Circle Calculator

    Sep 2, 2025 · Calculate the area of a circle with ease. Our Area of a Circle Calculator simplifies the process—simply input the radius, diameter, or circumference of the circle, and let the tool …

  4. Circle Area Calculator

    Jul 2, 2025 · This calculator determines the area of a circle using either the radius or the diameter. You may also enter a custom value for π, or use the default value of 3.14159.

  5. Area of Circle - Calculator, Formula & Examples | Free Online Tool

    Area of circle calculator using formulas A = πr², A = πd²/4, and A = C²/4π. Calculate area of a circle instantly from radius, diameter, or circumference with step-by-step solutions.

  6. Circle Area Calculator | Online Calculator

    Calculate the area of a circle based on its radius or diameter. Fast, accurate, and completely free. Includes the calculation formula and practical examples.

  7. Area of a Circle Calculator - theaimath.com

    Free online circle area calculator. Calculate the area of a circle using radius, diameter, or circumference with step-by-step solutions and visualizations.

  8. Free Circle Area Calculator: Find Area Using Radius, Diameter, or ...

    Calculate the area of any circle easily with our free online tool. Input radius, diameter, or circumference to get instant, accurate results with step-by-step explanations and visual …

  9. Circle Calculator | Compute Radius, Diameter, Area

    Nov 14, 2025 · Quickly calculate radius, diameter, circumference, and area of a circle. Use this Circle Calculator for math, engineering, or design projects online.

  10. Calculate the Area of a Circle

    This calculator will calculate the area of a circle given its diameter, using the famous formula area = pi times (d/2) squared. It supports different units such as meters, feet, and inches. Just type …