Math Calculators
Circle Calculator
Calculate circle properties from any single input.
What is the Circle Calculator & How does it work?
This Circle Calculator allows users to determine the radius, diameter, circumference, and area of a circle based on a single known value. By entering one of these measurements, such as the radius or circumference, the calculator computes the other three properties using fundamental geometric formulas.
The relationship between the radius ($r$) and diameter ($d$) is straightforward: $d = 2r$. The circumference ($C$) can be calculated using the formula $C = 2\pi r$ or equivalently $C = \pi d$. The area ($A$) of a circle is determined by the formula $A = \pi r^2$.
$$C = 2\pi r$$
C = Circumference, r = Radius, π = Pi (approximately 3.14159)
Parameters
m
m
m
m²
Radius
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Diameter
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Circumference
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Area
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Results are for informational purposes only and do not constitute professional advice.