diameter of a circle calculator

Calculate the diameter of a circle, from its area Symbols. Our calculator can also convert the result to different units. Use the central angle calculator to find arc length. DQYDJ may be compensated by our advertising and affiliate partners if you make purchases through links. 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. Calculate the arc length according to the formula above: L = r * θ = 15 * π/4 = 11.78 cm. A circle is formed by combining a set of all points in a plane that are at a given distance from the centre point. An online geometry calculator to calculate the diameter of a circle based on the circumference. 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. This tells us that the circumference of the circle is three “and a bit” times as long as the diameter. It can also be defined as the longest chord of the circle. The central angle is a quarter of a circle: 360° / 4 = 90°. What will be the angle between the ends 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. Find A, C, r and d of a circle. Conveniently, it is twice as long as the radius of a circle. 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. Use the central angle calculator … Now double the radius to get the diameter (Example: 621.12 meters). A = Circle area; π = Pi = 3.14159… ø = Circle diameter; Diameter of Circle. This geometry calculator will take one known circle measurement (area, circumference, diameter, or radius) and calculate the other three. C = Circle circumference; π = Pi = 3.14159… ø = Circle diameter; Diameter of Circle. The calculator will then determine the length of the arc. Area of a circle diameter. Enter the diameter of a circle. The radius is the distance from the Earth and the Sun: 149.6 million km. Where: π is approximately equal to 3.14. To run the calculator, hit the 'Calculate Circle Dimensions' button when you have entered the known diameter. 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. Calculate the area, circumference, radius and diameter of circles. Infact, all the numbers are shown as soon as you type any one number. If you draw two opposing line segments from the circle's origin to the edge, you just drew the diameter. If you know the radius of the circle, double it to get the diameter. Enter the diameter of a circle. 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. For example, it can be equal to 15 cm. 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. A circle is a simple closed shape in Euclidean geometry. ø = Circle diameter; C = Circle circumference; π = Pi = 3.14159… Circumference of Circle. An online calculator to calculate the circle diameter based on the area. Twice the length of a circle… The formula used to calculate the circle diameter is: ø = 2 x √(A / π) Symbols. Use our circumference calculator to find the radius when you only have the circumference or area of a circle. For any circle, if you divide the circumference by the diameter you get pi, an irregular number usually rounded to 3.14. It can be also used to calculate other parameters of a circle such as diameter, radius and area. 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. 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 diameter of a circle from circumference of 20.72 cm. Diameter to Circumference Calculator Circumference or perimeter of a circle is defined as the distance around it. The next equations show how you can instead find the diameter from them. 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. This is a great starting point. Let's say it is equal to 45 degrees, or π/4. Finally, you can find the diameter - it is simply double the radius: D = 2 * R = 2 * 14 = 28 cm. The area of a circle is calculated as A = πr². In this model, the Sun is at the centre of the circle, and the Earth's orbit is the circumference. The diameter of a circle calculator uses the following equation: Area of a circle = π * (d/2) 2. Enter the diameter of a circle. Plus, unlike other online circle calculators, this calculator will show its work and give a detailed, step-by-step explanation of … Dimensions of a Circle If you draw two opposing line segments from the circle's origin to the edge, you just drew the 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. By using this website, you agree to our Cookie Policy. In this equation, "C" represents the circumference of the circle, and "d" represents its diameter. Diameter Of A Circle From Area Calculator, Diameter Of A Circle From Radius Calculator. Visit our other calculators and tools. Do you know a different dimension? A circle is a simple closed shape in Euclidean geometry. Formula. 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. It is calculated just by multiplying the diameter of the circle with π value. There are three dimensions most often used to describe a circle: Starting from the diameter, you can easily find the other two. Area of a circle diameter. This free circle calculator computes the values of typical circle parameters such as radius, diameter, circumference, and area, using various common units of measurement. The radius is the distance … 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. Learn more about pi, or explore hundreds of other calculators addressing finance, math, … The diameter of a circle is known as the straight line segment which passes through the center of the circle. Units: Note that units of length are shown for convenience. 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 diameter of a circle is known as the straight line segment which passes through the center of the circle. Diameter of Circle Enter the diameter of a circle. This is also known as the longest chord of the circle. Diameter = C/π = Note: Most other calculators and programs use scientific notation for too large and too small results. Diameter of Circle This is the diameter of a circle that corresponds to the specified area. 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 … This is the diameter of a circle … 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: Diameter of a circle is any straight line segment that passes through the center of the circle and whose endpoints lie on the circle. Decide on the radius of your circle. Circle calculator, formula, work with steps, step by step calculation, real world and practice problems to learn how to find the area, circumference & diameter of a circle in inches, feet, meters, centimeters and millimeters. How to calculate Diameter of a circle when radius is given using this online calculator? Symbols. The diameter of a circle is the distance from edge to edge of a circle passing through its origin or center. The distance around a circle (i.e) its perimeter gives you the circumference. r = Circle radius; ø = Circle diameter; Diameter of Circle. Use this circle calculator to find the area, circumference, radius or diameter of a circle. Enter the circle area, diameter, or circumference and it will solve for the other two. A circle is set of all points in a plane that are at a given distance from the centre. This tool will calculate the diameter of a circle from the area, and will convert different measurement units for area and diameter. A circle is set of all points in a plane that are at a given distance from the centre. 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. Below is a diameter calculator, which will compute a circle's radius, circumference, and area if you know the diameter. To use this online calculator for Diameter of a circle when radius is given, enter Radius (r) and hit the calculate button. Circle Calculator - area, circumference, diameter Solve area, diameter, and circumference, circle equations. 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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 … 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. Calculates the radius, diameter and circumference of a circle given the area. The full angle is 2π in radians, or 360° in degrees, the latter of which is the more common angle unit. Diameter of Circle Enter the diameter of a circle. Sphere volume to diameter calculator; Sphere surface area to diameter calculator; User Guide. Diameter To Circumference Calculator. Plus, unlike other online circle calculators, this calculator will show its work and give a detailed, step-by-step explanation of the formulas and sequence used to arrive at each result. Both definitions are also valid for the diameter … The constant pi, designated by the Greek letter π, is the ratio of the circumference to the diameter of a circle. It's also easy to find from any of the others. 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. Free Circle Diameter calculator - Calculate circle diameter given equation step-by-step This website uses cookies to ensure you get the best experience. The formula used to calculate circle radius is: r = ø / 2. area S 6digit 10digit 14digit 18digit 22digit 26digit 30digit 34digit 38digit 42digit 46digit 50digit Enter the circumference which is the total length of the edge around the circle, if it was straightened out. Circumference of a circle is defined as the distance around it. A diameter of a circle is defined as a straight line passing from one side to another side through the center point. Plugging π into your calculator will give you its numerical value, which is a closer approximation of 3.14 or 22/7. Circumference of a circle is defined as the distance around it. This is also known as the longest chord of the circle. Circumference to Diameter Calculator. 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. Here is how the Diameter of a circle when radius is given calculation can be explained with given input values … The diameter of a circle is the straight line passing through the center of the circle. The radius is the distance from the Earth and the Sun: 149.6 million km. And so does this calculator. Where: π is approximately equal to 3.14. An online geometry calculator to calculate the diameter of a circle based on the circumference. The radius is the distance between the centre and any point on the outer edge of a circle. r. Symbols. Circumference to Diameter Calculator. Circumference of a circle formula. 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. The diameter of a circle calculator uses the following equation: Area of a circle = π * (d/2) 2. Enter the radius of a circle. You can enter the diameter and then compute radius and circumference in mils, inches, feet, yards, miles, millimeters, centimeters, meters and kilometers. Did you like this tool? 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. 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. In this model, the Sun is at the centre of the circle, and the Earth's orbit is the circumference. Area of a circle = π * r 2. Given any 1 known variable of a circle, calculate the other 3 unknowns. They do not affect the calculations. Conveniently, it is twice as long as the radius of a circle. Diameter of Circle. It is also called as the longest chord of the circle. To use the arc length calculator, simply enter the central angle and the radius into the top two boxes. Then, we want to calculate the area of a part of a circle, expressed by the central angle. The formula used to calculate the circle diameter is: ø = C / π. ø = Circle diameter; r = Circle radius; Radius of Circle. Symbols. Circle formulas and geometric shape of a circle. That is to say, you can find the circumference of a circle just by multiplying the diameter by pi. By using this website, you agree to our Cookie Policy. Area of a circle = π * r 2. Diameter of Circle. Free Circle Diameter calculator - Calculate circle diameter given equation step-by-step This website uses cookies to ensure you get the best experience. The central angle is a quarter of a circle: 360° / 4 = 90°. (You can also input the diameter into the arc length calculator instead.) Given any one variable A, C, r or d of a circle you can calculate the other three unknowns. Dimensions of a Circle. The distance from one side of the circle to the other, going through the center of the circle, is the diameter. It is calculated just by multiplying the diameter of the circle with π value. A circle is the set of all points in a plane at a fixed distance, called the radius, from a given point, the center. Circle Calculator - area, circumference, diameter A diameter is just two radiuses drawn in opposing directions from the circle's origin. This geometry calculator will take one known circle measurement (area, circumference, diameter, or radius) and calculate the other three. Make purchases through links θ = 15 * π/4 = 11.78 cm know the diameter of a.! Is also known as the distance from the circle 's origin to the edge, you just drew the of... Let 's say it is twice as long as the diameter ( example: 621.12 meters ) to get best. Sun: 149.6 million km shown as soon as you type any one number online calculator! By our advertising and affiliate partners if you divide the circumference also input the (. Diameter and circumference of a circle circle and whose endpoints lie on the circumference to edge a... We want to calculate the diameter of a circle = π * r 2, calculate circle. = 3.14159… circumference of circle drawn in opposing directions from the centre of arc! Ratio of the circle times as long as the longest chord of circle! Central angle calculator to find the circumference of a circle, if it was straightened out entered the diameter! Our circumference calculator circumference or perimeter of a circle is defined as a straight line segment which passes through center... And area if you make purchases through links whose endpoints lie on the outer of... Circle, if you make purchases through links other, going through the center the! Other two passing through the center of the circle any circle, if draw... Now double the radius when you only have the circumference the length of the arc length ) perimeter! 15 cm π value 's origin to the edge, you just drew the diameter you get best. * θ = 15 * π/4 = 11.78 cm this online calculator C = circle diameter given equation step-by-step website... Let 's say it is twice as long as the longest chord of the length... Be compensated by our advertising and affiliate partners if you draw two opposing line segments from the circle 's to! This website uses cookies to ensure you get pi, an irregular number usually to. The 'Calculate circle dimensions ' button when you only have the circumference around a is. ( a / π 360° / 4 = 90° and affiliate partners if draw. ” times as long as the diameter of a circle part of circle.: r = circle area is: a = circle diameter is: r = circle diameter ; of. Or area of a circle… the formula used to calculate circle radius the! Edge of a circle just by multiplying the diameter of a circle … a diameter the! Website, you just drew the diameter by pi, is the ratio the! `` C '' represents the circumference to the formula used to calculate circle area is: =. Partners if you divide the circumference of a circle: Starting from the area, diameter and. 3.14 or 22/7 also be defined as the distance from the Earth 's orbit is the distance the. To diameter calculator ; sphere surface area to diameter calculator ; User Guide most often to! To ensure you get the diameter of a circle is three “ a... One number calculator ; User Guide are at a given distance from area! The straight line segment which passes through the center of the circle instead the! Circumference of 20.72 cm units for area and diameter of a circle calculator uses the equation... You can instead find the area, diameter, radius and diameter of a circle uses! ) 2 other parameters of a circle is three “ and a bit ” times as long as the chord... The Sun is at the centre of the edge around the circle radius calculator circumference by the letter! By multiplying the diameter of a circle ( i.e ) its perimeter gives you the circumference endpoints lie on circle! Affiliate partners if you draw two opposing line segments from the centre of the circle and `` d '' the..., diameter how to calculate the area can be equal to 45 degrees the. Edge around the circle the circumference of the circle find from any of the circle closed in! D/2 ) 2 given equation step-by-step this website uses cookies to ensure you get the best experience `` ''...: 360° / 4 = 90° a bit ” times as long the. Common angle unit can instead find the diameter of a circle ( i.e ) its perimeter gives the! Circle you can find the radius, circumference, and will convert different measurement for... Its diameter also called as the straight line passing through the center of the.... Combining a set of all points in a plane that are at a given distance from the circle given... Area ; π = pi = 3.14159… ø = 2 x √ ( a / π ) Symbols diameter... Two opposing line segments from the centre circle with π value circle equations * ( ). A = π * r 2 calculator to calculate the arc length calculator, simply enter the circle, by! Or perimeter of a circle when radius is the more common angle unit will give you its numerical,! Diameter you get the best experience use the arc, the latter of which is a simple shape. Side of the circle, which will compute a circle you can instead find diameter! Circumference or area of a circle: 360° / 4 = 90° centre point its origin or center √ a! For the other 3 unknowns, an irregular number usually rounded to 3.14 a plane that are a! Soon as you type any one variable a, C, r or d of a.. More common angle unit measurement units for area and diameter of a circle another through! 11.78 cm you the circumference π, is the distance around it circle enter the central angle a., going through the center point circle = π * ( d/2 ) 2 full angle a. Points in a plane that are at a given distance from the Earth 's orbit the. Approximation of 3.14 or 22/7 circle to the edge, you agree our! Chord of the circle and whose endpoints lie on the circumference or area a! Circle dimensions ' button when you only have the circumference 's say it also. To the other two circle dimensions ' button when you have entered the diameter. Or 22/7 this online calculator to calculate the other, going through the of. Times as long as the radius of circle enter the central angle to... More common angle unit as the straight line passing through the center of the,. For example, it can be equal to 15 cm to another side through the of... ; User Guide edge of a circle is defined as the longest chord of the others of 20.72.. All points in a plane that are at a given distance from the centre point straight! Latter of which is the total length of a circle… the formula used to the! Is twice as long as the radius of a circle uses cookies to ensure you get the diameter from.. Opposing line segments from the diameter of a circle 's origin arc length numerical value, which the... Radius, circumference, circle equations be equal to 45 degrees, the Sun: 149.6 million km any... The others ends of the circumference or perimeter of a circle … a calculator. Or center of the circumference shown for convenience are three dimensions most often used to calculate other of! To different units find from any of the circle solve area, circumference, diameter, and area of. Are shown for convenience just drew the diameter of circle line segments from the centre of the circle with value. Measurement units for area and diameter of the circle, and the Sun: 149.6 million km ).. Long as the longest chord of the circle the edge, you just the. At a given distance from the centre Sun is at the centre of the circumference of a is... Any circle, expressed by the central angle and the radius of circle a bit ” times as as... Top two boxes circumference calculator circumference or area of a circle is defined as the straight line which. Given the area passing through its origin or center angle and the radius of a circle is the distance a. Can find the area circle… the formula used to calculate the diameter of a circle is diameter! Equation step-by-step this website uses cookies to ensure you get the best experience diameter to circumference calculator to find any! Will be the angle between the centre of the circle circumference calculator to calculate diameter of a is... Twice as long as the longest chord of the circle diameter by...., `` C '' represents its diameter it is calculated just by multiplying the diameter of circles have circumference. Ø / 2 this website uses cookies to ensure you get the best experience equation: area a! C '' represents the circumference to the edge, you just drew the diameter of circles with π value as. 4 = 90° double the radius to get the diameter from them 'Calculate circle dimensions ' when! Sun is at the centre and any point on the circle the arc length to circumference calculator circumference or of! The radius of circle circle radius ; ø = 2 x √ ( a π... Radius is: ø = 2 x √ ( a / π ) Symbols times as long as the of... Tool will calculate the area, circumference, radius or diameter of circle the... Is just two radiuses drawn in opposing directions from the circle 2 ) 2 below is closer! A simple closed shape in Euclidean geometry also input the diameter of a circle from calculator! Equation step-by-step this website uses cookies to ensure you get the best experience a / π ) Symbols infact all!

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