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If you know the circumference, the ration of the diameter to the circumference is π, so

diameter = circumference/π

If you have the radius,

diameter = 2 x radius

Q: How do you calculate the diameter of a circle?

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circle diameter minus center of pitch cirlce raius

Circumference = diameter*pi

Double the Radius to Calculate the Diameter.

The radius is one -half of the diameter. It is the distance from the circle center to any point on the circumference.

Take out the diameter of the outer circle from the distance between the two. Gives you the diameter of the inner circle then pi r squared it.

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The radius of a circle is half of its diameter.

circle diameter minus center of pitch cirlce raius

Radius of a circle = diameter/2

Radius of a circle = diameter/2

Doubling the radius will give the diameter and times this by pi will give the circumference of the circle.

Divide the area by Pi to get the diameter.

Circumference = diameter*pi

Double the Radius to Calculate the Diameter.

Divide the diameter by 2.

The radius is one -half of the diameter. It is the distance from the circle center to any point on the circumference.

Take out the diameter of the outer circle from the distance between the two. Gives you the diameter of the inner circle then pi r squared it.

pi*diameter = circumference Rearrange the formula so as the diameter is the subject of the formula: diameter = circumference/pi diameter = 7/pi = 2.228169203