What is the Outside diameter for schedule 40 pipe?

Schedule 40 Pipe O.D. through 12" Size (inch) O.D. (inch) 
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3/4 1.050 
1 1.315 
1-1/4 1.660 
1-1/2 1.900 
2 2.375 
2-1/2 2.875 
3 3.500 
4 4.500 
5 5.563 
6 6.625 
8 8.625 
10 10.750 
12 12.750 Charts with the larger sizes are readily available online