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Jul 30, 2024 · 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
- How to Calculate The Area of Any Shape?
- Area of A Square
- Area of A Rectangle
- Area of A Triangle
- Area of A Circle
- Area of A Parallelogram
- Area of A Trapezoid
- Area of An Ellipse
- Area of A Sector
- Area of An Octagon
Each geometrical figure has a different formula for calculating its area, and different required measurements that need to be known. See below for details on each individual one this area calculator supports, including the formula used. When taking measurements or reading plans, make sure all measurements are in the same units, or convert them to t...
The formula for the area of a square is side2, as seen in the figure below: This is the simplest figure to calculate the area of as it requires just a single measurement using a ruler, a tape measure, or a similar device. However, since in most practical situations you need to measure both sides before you know it is a square, it will take the same...
The formula for the area of a rectangle is width x height, as seen in the figure below: To find the area, you would either be given or would have to take two measurements: the width and the height, and just multiply them together. It is one of the easiest figures to compute the area of. In many cases irregular shapes that require an area calculatio...
The formula for the area of a triangle is height x π x (radius / 2)2, where (radius / 2) is the radius of the base (d = 2 x r), so another way to write it is height x π x radius2. Visual in the figure below: Despite the simplicity of the above equation, in specific situations you may not know these two exact measurements. There are multiple rules t...
The formula to find the area of a circle is π x radius2, but the diameter of the circle is d = 2 x r, so another way to write the equation is as π x (diameter / 2)2. Here is what the measurement looks like: In order to find the area of a circle you need to know only its radius. However, in most practical situations it is easier to calculate the dia...
The formula for the area of a parallelogram is width x height, as seen in the figure below: It can be shown through simple mathematical transformations that a parallelogram's area can be viewed as the area of a rectangle with its sides being equal to any side of the parallelogram and the height to it. The formula to find the area of a parallelogram...
To find the area of a trapezoid use the equation (base 1 + base 2) / 2 x height. The inputs are as seen in the figure below: By definition, the bases are always parallel to each other so it is easy to identify them. This is one of the more complex formulas, but still pretty manageable, especially with the help of an area finder. A trapezoid can be ...
The formula for the area of an ellipse is π x major radius x minor radiuswith measurements as shown: The area of an oval is found similarly to that of a circle, but since it has two radiuses, the equation and required measurements are slightly different. With an oval one needs to measure the two diameters and divide by two to get the two radiuses.
The formula for the area of a sector is (angle / 360) x π x radius, but the diameter of the circle is d = 2 x r, so another way to write it is (angle / 360) 2 x π x (diameter / 2). A graph showing the needed measurements is below: Since a sector is just a slice from a circle, the formula to find its area is quite similar to the one used for the are...
The area of an octagon of regular shape can be found using the formula 2 · (1 + √2) · side2, where a side is as shown below: It only requires a single measurement, granted that it is already known that the figure is, indeed, a regular octagon. Otherwise one needs to measure all sides first to confirm that they are all equal, before proceeding to ca...
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. How to calculate the area of a circle? The formula for the area of a circle is π x radius2, but the diameter of the circle is d = 2 x r 2, so another way to write it is π x (diameter / 2)2.
Calculate the area of a circle given the radius, diameter, or circumference. Plus learn the formulas and steps to find a circle's area.
What is the area of a circle with a DIAMETER of 10 cm (radius of 5 cm)? How big is a 10 centimeter circle? Use this easy and mobile-friendly calculator to compute the area of a circle given its diameter.
DiameterCm2In2Ft210.0 cm78.5412.170.0845410.1 cm80.1212.420.0862410.2 cm81.7112.670.0879510.3 cm83.3212.920.08969Here you will learn about calculating the area of a circle, including how to calculate the area of a circle given the radius, how to calculate the area of a circle given the diameter and how to calculate the area of a circle given the circumference.
You can find it with the following formulas: If you know the diameter of the circle: r = d / 2. If diameter and area are unknown: r = c / 2π. If diameter and circumference are unknown: r = √(a / π)
