2pi*R

You mean circumference of a circle?

The formula is 44/7 x r

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Where r is the radius of the circle.

You have the width or diameter. Divide the diameter by 2 to calculate the radius. The radius would be in your case,

1.5/2 = 0.75 inch

The formula is 44/7 x r

======

Where r is the radius of the circle.

You have the width or diameter. Divide the diameter by 2 to calculate the radius. The radius would be in your case,

1.5/2 = 0.75 inch