Understanding pipe measurement is essential for every civil engineer and site supervisor. In this post, we explain how to calculate the circumference of a pipe using its outer diameter (OD) with a simple formula. 📌 Formula Used: Circumference (CF) = Outer Diameter (OD) × 3.14 📌 Example Explained: Pipe Size = 8 inch Pipe Outer Diameter = 220 mm CF = 220 × 3.14 = 691 mm This method is widely used in fabrication, insulation, painting, and site measurements. Follow Civil Wisdom for more practical