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The area of a circle calculator helps you compute the surface of a circle given a diameter or radius. Our tool works both ways — no matter if you're looking for an area-to-radius calculator or a radius to the area one, you've found the right place .
Switch tool with the current settings for diameter, and calculate circle circumference, circle radius, sphere volume or sphere surface area instead. This tool will calculate the area of a circle from the diameter, and will convert different measurement units for diameter and area.
This calculator computes the values of typical circle parameters such as radius, diameter, circumference, and area, using various common units of measurement.
Calculate the area of a circle given the radius, diameter, or circumference. Plus learn the formulas and steps to find a circle's area.
Area of a Circle Calculator. Use this calculator to easily calculate the area of a circle, given its radius in any metric: mm, cm, meters, km, inches, feet, yards, miles, etc.
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.
This circle calculator finds c (circumference), d (diameter), a (area), and r (radius) of a circle.
Given: Prove isosceles triangles, parallelogram, and midsegment. Segments & Points. Triangle. Quadrilateral. Circle. Parallels.
This calculator will allow you compute the area of circles, provided that you provide the diameter. The diameter provided needs to be any valid positive expression. It could be a number like '2', it could be a fraction like '3/4' or it could a expression involving square roots, like '3sqrt (3)'.
Calculate the area, circumference, radius and diameter of circles. Find A, C, r and d of a circle. Given any 1 known variable of a circle, calculate the other 3 unknowns.