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1 dzień temu · 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
- Semicircle Area Calculator
With this semicircle area calculator, you can quickly find...
- Central Angle Calculator
In this model, the Sun is at the center of the circle, and...
- Segment Area Calculator
In our example, we want to find the area of the...
- Circumference to Diameter Calculator
Diameter and circumference are lengths related to each other...
- Circle Formula Calculator
Suppose you have a circle of radius 3 cm. If you want to...
- Arc Length Calculator
The length of an arc depends on the radius of a circle and...
- Surface Area Calculator
The base is again the area of a circle A(base) = π × r², but...
- Sphere Volume Calculator
Enter the radius of the sphere. For size 5 soccer ball...
- Semicircle Area Calculator
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.
3 dni temu · This circle calculator finds c (circumference), d (diameter), a (area), and r (radius) of a circle.
6 dni temu · The radius of a circle calculator returns the length of a circle's radius based on the input data: the circumference, area, or diameter.
How to Calculate the Area. 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. Example: What is the area of a circle with radius of 3 m ? Radius = r = 3. Area = π r2. = π × 32. = 3.14159... × (3 × 3) = 28.27 m2 (to 2 decimal places)
The area of a regular polygon is half its perimeter multiplied by the distance from its center to its sides, and because the sequence tends to a circle, the corresponding formula–that the area is half the circumference times the radius–namely, A = 1 / 2 × 2πr × r, holds for a circle.
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.
