Enter the radius of a circle. This is also known as the longest chord of the circle. Use the central angle calculator … A = Circle area; π = Pi = 3.14159… ø = Circle diameter; Diameter of Circle. Visual on the figure below: π is, of course, the famous mathematical constant, equal to about 3.14159, which was originally defined as the ratio of a circle's circumference to its diameter. Just input the circumference value in the input field and the diameter of a circle from circumference calculator will automatically update you with the circle diameter. Dimensions of a Circle. Free Circle Diameter calculator - Calculate circle diameter given equation step-by-step This website uses cookies to ensure you get the best experience. Use this circle calculator to find the area, circumference, radius or diameter 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. Diameter Of A Circle From Area Calculator, Diameter Of A Circle From Radius Calculator. Conveniently, it is twice as long as the radius of a circle. Now double the radius to get the diameter (Example: 621.12 meters). The radius is the distance between the centre and any point on the outer edge of a circle. By using this website, you agree to our Cookie Policy. The diameter of a circle is the distance from edge to edge of a circle passing through its origin or center. The diameter of a circle is known as the straight line segment which passes through the center of the circle. Area of a circle diameter. r = Circle radius; ø = Circle diameter; Diameter of Circle. Diameter of Circle. Compute the area using these units: square mils, square inches, square feet, square yards, square miles, acres, hectares, square millimeters, square centimeters, square meters, and square kilometers. Enter the diameter of a circle. The radius is the distance from the Earth and the Sun: 149.6 million km. Decide on the radius of your circle. Circumference of a circle is defined as the distance around it. The area of a circle is calculated as A = πr². An online geometry calculator to calculate the diameter of a circle based on the circumference. The diameter of a circle is the length of a straight line drawn between two points on a circle where the line also passes through the centre of a circle, or any two points on the circle as long as they are exactly 180 degrees apart. Units: Note that units of length are shown for convenience. Diameter of Circle Enter the diameter of a circle. How to calculate Diameter of a circle when radius is given using this online calculator? It is also called as the longest chord of the circle. Area of a circle diameter. r. Symbols. The calculator will then determine the length of the arc. The equation for diameter of a circle from circumference is: If written instead in terms of the radius, the diameter is very simple; it's just twice as long: Area is the space contained within the circle's boundaries. Area of a circle = π * r 2. That is to say, you can find the circumference of a circle just by multiplying the diameter by pi. How to use the Calculator: Insert the Diameter to calculate the Radius or input the Radius to find the Diameter; Either insert the Angle of the Arc or insert the length; So, by carrying out either of the two foregoing operations, the user will be able to find the Arc of a Circle quickly and without any difficulties. Symbols. Finally, you can find the diameter - it is simply double the radius: D = 2 * R = 2 * 14 = 28 cm. The next equations show how you can instead find the diameter from them. Area of a circle = π * r 2. The diameter of a circle calculator uses the following equation: Area of a circle = π * (d/2) 2. 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Where: π is approximately equal to 3.14. The full angle is 2π in radians, or 360° in degrees, the latter of which is the more common angle unit. This is the diameter of a circle … Diameter To Circumference Calculator. Diameter of Circle Enter the diameter of a circle. Sphere volume to diameter calculator; Sphere surface area to diameter calculator; User Guide. Find A, C, r and d of a circle. Using the Radius Calculator You can enter the radius and then compute diameter and circumference in mils, inches, feet, yards, miles, millimeters, centimeters, meters and … Circle Calculator - area, circumference, diameter Just enter the area value in the input field and click calculate in this Diameter of a circle from area calculator to find the result. Visit our other calculators and tools. Given any 1 known variable of a circle, calculate the other 3 unknowns. What will be the angle between the ends of the arc? Instead try one of the related circle dimension calculators: The diameter of a circle is the distance from edge to edge of a circle passing through its origin or center. Calculate diameter of a circle from circumference of 20.72 cm. Calculate the area, circumference, radius and diameter of circles. Let's say it is equal to 45 degrees, or π/4. Free Circle Diameter calculator - Calculate circle diameter given equation step-by-step This website uses cookies to ensure you get the best experience. Both definitions are also valid for the diameter … Dimensions of a Circle Symbols. Diameter of Circle. ø = Circle diameter; C = Circle circumference; π = Pi = 3.14159… Circumference of Circle. Then, we want to calculate the area of a part of a circle, expressed by the central angle. They do not affect the calculations. Where: π is approximately equal to 3.14. A circle is set of all points in a plane that are at a given distance from the centre. This means you can use this tool to do other calculations such as diameter to circumference, radius to area, radius to cicumference, area to radius, area to circumference etc. If you draw two opposing line segments from the circle's origin to the edge, you just drew the diameter. You can enter the diameter and then compute radius and circumference in mils, inches, feet, yards, miles, millimeters, centimeters, meters and kilometers. Given any one variable A, C, r or d of a circle you can calculate the other three unknowns. To use this online calculator for Diameter of a circle when radius is given, enter Radius (r) and hit the calculate button. Diameter of Circle This is the diameter of a circle that corresponds to the specified area. This is a great starting point. As with a circle, the longest line segment that connects two points of a sphere through its center is called the diameter, d. The equation for calculating the volume of a sphere is provided below: DQYDJ may be compensated by our advertising and affiliate partners if you make purchases through links. The radius is the distance from the Earth and the Sun: 149.6 million km. To run the calculator, hit the 'Calculate Circle Dimensions' button when you have entered the known diameter. For example, it can be equal to 15 cm. The diameter of a circle is known as the straight line segment which passes through the center of the circle. Use our circumference calculator to find the radius when you only have the circumference or area of a circle. It can also be defined as the longest chord of the circle. A diameter of a circle is defined as a straight line passing from one side to another side through the center point. A circle is formed by combining a set of all points in a plane that are at a given distance from the centre point. Circle formulas and geometric shape of a circle. ø = Circle diameter; r = Circle radius; Radius of Circle. If we are only given the diameter and not the radius we can enter that instead, though the radius is always half the diameter so it’s not too difficult to calculate. The diameter of a circle is the length of a straight line drawn between two points on a circle where the line also passes through the centre of a circle, or any two points on the circle as long as they are exactly 180 degrees apart. An online geometry calculator to calculate the diameter of a circle based on the circumference. Enter the diameter of a circle. The central angle is a quarter of a circle: 360° / 4 = 90°. Our calculator can also convert the result to different units. The formula used to calculate circle area is: A = π x (ø/ 2) 2. The diameter of a circle is the length of a straight line drawn between two points on a circle where the line also passes through the centre of a circle, or any two points on the circle as long as they are exactly 180 degrees apart. To use the arc length calculator, simply enter the central angle and the radius into the top two boxes. This is also known as the longest chord of the circle. If you draw two opposing line segments from the circle's origin to the edge, you just drew the diameter. In this model, the Sun is at the centre of the circle, and the Earth's orbit is the circumference. A circle is set of all points in a plane that are at a given distance from the centre. A circle is a simple closed shape in Euclidean geometry. It doesn't matter whether you want to find the area of a circle using diameter or radius - you'll need to use this constant in almost every case. Circle Calculator - area, circumference, diameter By using this website, you agree to our Cookie Policy. Circumference of a circle formula. Did you like this tool? How to use the Calculator: Insert the Diameter to calculate the Radius or input the Radius to find the Diameter Either insert the Angle of the Arc or insert the length So, by carrying out either of the two foregoing operations, the user will be able to find the Arc of … The formula used to calculate circle radius is: r = ø / 2. It is calculated just by multiplying the diameter of the circle with π value. This circle calculator apart from finding the diameter, area of sector, radius, circumference of the circle, also provides you the individual formulas for the calculation of the same. Calculate the arc length according to the formula above: L = r * θ = 15 * π/4 = 11.78 cm. Circumference to Diameter Calculator. And so does this calculator. There are three dimensions most often used to describe a circle: Starting from the diameter, you can easily find the other two. The formula used to calculate the circle diameter is: ø = C / π. This geometry calculator will take one known circle measurement (area, circumference, diameter, or radius) and calculate the other three. Diameter to Circumference Calculator Circumference or perimeter of a circle is defined as the distance around it. Conveniently, it is twice as long as the radius of a circle. If you know the radius of the circle, double it to get the diameter. An online calculator to calculate the circle diameter based on the area. The formula for working out the circumference of a circle is: Circumference of circle = π x Diameter of circle This is typically written as C = πd. The circumference of a circle is calculated using the formula: 2 x π x radius, where π is a mathematical constant, equal to about 3.14159.It was originally defined as the ratio of a circle's circumference to its diameter (see second formula below on why) and appears in many formulas in mathematics, physics, and everyday life. Circumference to Diameter Calculator. This tells us that the circumference of the circle is three “and a bit” times as long as the diameter. Enter the circumference which is the total length of the edge around the circle, if it was straightened out. A diameter is just two radiuses drawn in opposing directions from the circle's origin. It's also easy to find from any of the others. The central angle is a quarter of a circle: 360° / 4 = 90°. This tool will calculate the diameter of a circle from the area, and will convert different measurement units for area and diameter. This geometry calculator will take one known circle measurement (area, circumference, diameter, or radius) and calculate the other three. For a circle, three lengths most commonly are applied: The radius – defined above; The diameter – the distance from edge to edge of a circle passing through its origin or center. Plugging π into your calculator will give you its numerical value, which is a closer approximation of 3.14 or 22/7. In this model, the Sun is at the centre of the circle, and the Earth's orbit is the circumference. Circumference of a circle is defined as the distance around it. A circle is a simple closed shape in Euclidean geometry. Regardless of this distinction, a ball and a sphere share the same radius, center, and diameter, and the calculation of their volumes is the same. The formula used to calculate the circle diameter is: ø = 2 x √(A / π) Symbols. Enter the circle area, diameter, or circumference and it will solve for the other two.