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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
Area of a circle is the region occupied by the circle in a two-dimensional plane. It can be determined easily using a formula, A = πr2, (Pi r-squared) where r is the radius of the circle. The unit of area is the square unit, such as m2, cm2, etc.
You can find the area of a circle using the radius, the diameter, or the circumference. To find the area using the radius, or the length from the center of the circle to the edge, use the formula area = πr^2, where r is the radius. For example, if the radius of the circle is 6 inches, first you would square 6 and get 36.
Understand that you can easily determine the area of a circle using the formula Area = π × r^2, where π is approximately 3.14, and r represents the radius of the circle. Note that radius is half the diameter of a circle.
The area of a circle is the region occupied by the circle within its boundary (circumference) in a 2D plane. If the radius of a circle is r, the area is defined as A = πr 2 , where is a mathematical constant with approximate value of 3.14 or $\frac{22}{7}$.
Enter the radius, diameter, circumference or area of a Circle to find the other three. The calculations are done "live":
Area of a circle, formula for area explained with examples, pictures, interactive examples and quiz.
The area of a circle can be calculated using three different formulas. The formulas are used based on whether the radius, diameter, or circumference is known to us. Each of the three situations is discussed below with their formulas and solved examples.
The formula for the area of a circle is A = πr 2, where r is the radius of the circle. The unit of area is the square unit, for example, m 2 , cm 2 , in 2 , etc. The area of a circle formula is useful for measuring the region occupied by a circular field or a plot.
The formula to find the area of a circle is to square the radius and multiply by π. The inverse of this is divide the area by π, then square root. π𝒓² = 400.