How do you calculate weld inches for pipe?

To calculate weld inches for pipe, first determine the total length of the welds required for the project. Measure the circumference of the pipe (using the formula π times the diameter) and multiply it by the number of joints or welds. For multiple welds, sum the lengths of all individual welds to get the total weld inches. Finally, if applicable, factor in the number of passes required for each weld to obtain the overall weld inches.