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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 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.
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: π (Pi) times the Radius squared: A = π r2. or, when you know the Diameter: A = (π/4) × D2. or, when you know the Circumference: A = C2 / 4π.
The formula to find a circle's area π π (radius) 2 usually expressed as π ⋅r2 π ⋅ r 2 where r is the radius of a circle. Diagram 1. Area of Circle Concept. The area of a circle is all the space inside a circle's circumference. In diagram 1, the area of the circle is indicated by the blue color. The area is not actually part of the circle.
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.
A = π × r². Thus, the area of a circle A is equal to pi times the radius r squared. Find Area Using Diameter. The diameter is the length of a straight line from one edge of the circle to the opposite edge that passes through its center. If the line does not pass through the center of the circle, it is called a chord, not the diameter.
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.
The area of a circle can be found using the following formula: A = πr 2 where A is area, r is radius, and π is the mathematical constant approximately equal to 3.14159.
Use the formulas to calculate the circumference and area: c = 2πr and A = πr². The circumference should equal c = 2π × 8 cm = 50.265 cm. The area should equal A = π × (8 cm)² = 201.06 cm². To check your results, input the 8 cm radius in the calculator. The results should also be 50.265 cm and 201.06 cm². Other awesome Omni Calculators.