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Finally, you can find the diameter - it is simply double the radius: D = 2*R = 2*14 = 28 cm. Use our circumference calculator to find the radius when you only have the circumference or area of a circle. If you wish to calculate the properties of a three-dimensional solid, such as a sphere, cylinder or cone, it's best to use our volume calculator.


The formula to find the circumference when radius is given is Radius = Circumference/(2*π) The formula to find the area when radius is given is Area of circle = π*Radius*Radius In the above formulas, π=3.14159 and R is the radius. You can read more about circumference in this WikiPedia article - Circumference.


How to Find the Circumference of a Circle Using Its Area. You may need to calculate the circumference of a circle. You can do that by using its area. Use the formula for the area of a circle, π*r^2, or pi times radius r squared = Area ...


How to Calculate the Area & Circumference of a Circle ... Calculating either the circumference or area of a circle requires knowing the circle's radius. A circle's radius is the distance from the center of the circle to any point on the edge of the circle. Radius is the same for all points on a circle's edge.


To calculate the circumference of a circle, use the formula C = πd, where "C" is the circumference, "d" is the diameter, and π is 3.14. If you have the radius instead of the diameter, multiply it by 2 to get the diameter. You can also use the formula for circumference of a circle using radius, which is C = 2πr.


Circle Shape. r = radius d = diameter C = circumference A = area π = pi = 3.1415926535898 √ = square root. Calculator Use. Use this circle calculator to find the area, circumference, radius or diameter of a circle. Given any one variable A, C, r or d of a circle you can calculate the other three unknowns.


To find out circumference of circle you either know radius or area of the circle. 1st Way to Calculate Circumference of Circle: When You Know Diameter of Circle. How to find circumference of circle: There is a simple formula to finding out circumference of a circle using the diameter. Formula of circumference of a circle (C) = πd, where π is ...


Understanding the Circumference Calculator: To understand how to calculate circumference we must first begin with the definition of circumference. Circumference of a circle is linear distance around outer border of a circle. To find out the circumference, we need to know its diameter which is the length of its widest part.


Therefore, the circumference depends only on the size of r. That is why you only need to enter r here to get the circumference The calculator will only accept positive value for r since a distance cannot be negative As a reminder, if r = 4 cm for instance, circumference = 2 ×3.14 ×4 = 25.12 cm


Area and circumference of circles. Radius, diameter, circumference & π ... Finding circumference of a circle when given the area. This is the currently selected item. Partial circle area and arc length. Practice: Area of parts of circles. Area of circles review. Tags. Area of a circle Circumference.