Pipe Dimension Table


 
The table below shows the outside (O.D) and inside (I.D) diameters, as well as the wall thicknesses for various pipe sizes. The dimensions vary according to the schedule thickness (40, 10, or 5). The most common is 40; the rarest is 5.

For example, a 1-1/4 inch schedule 40 pipe size has a 1.660 inch O.D., a 1.380 inch I.D., and a 0.140 inch wall thickness. The wall thickness is the difference between the O.D. and I.D. divided by two {(1.66-1.38) / 2 = 0.140}.

 
O.D., I.D., & Wall Thickness Dimensions For Given Pipe Sizes
Pipe Size Schedule 40 Thickness Schedule 10 Thickness Schedule 5 Thickness
O.D.

I.D.

Wall Thickness O.D.

I.D.

Wall Thickness O.D.

I.D.

Wall Thickness
3/4 1.050 0.824 0.113 1.050 0.884 0.083 1.050 0.920 0.065
1 1.315 1.049 0.133 1.315 1.097 0.109 1.315 1.185 0.065
1-1/4 1.660 1.380 0.140 1.660 1.442 0.109 1.660 1.530 0.065
1-1/2 1.900 1.610 0.145 1.900 1.682 0.109 1.900 1.770 0.065
2 2.375 2.067 0.154 2.375 2.157 0.109 2.375 2.245 0.065
2-1/2 2.875 2.469 0.203 2.875 2.635 0.120 2.875 2.709 0.083
3 3.500 3.068 0.216 3.500 3.260 0.120 3.500 3.334 0.083
3-1/2 4.000 3.548 0.226 4.000 3.760 0.120 4.000 3.834 0.083
4 4.500 4.026 0.237 4.500 4.260 0.120 4.500 4.334 0.083
6 6.625 6.065 0.280 6.625 6.357 0.134 6.625 6.407 0.109
8 8.625 7.981 0.322 8.625 8.329 0.148 8.625 8.407 0.109


*Table values are in inches
*O.D. = Outside Diameter
*I.D. = Inside Diameter