⭕
Circle Calculator
Calculate radius, diameter, circumference and area of a circle. Enter any value to find the others with π precision.
Math & Calculation
9,800
3.1415926535…
Radius (r)
5
Diameter (d)
10
Circumference (C)
31.4159
Area (A)
78.5398
Formulas
d = 2r
C = 2πr
A = πr²
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