ODNR DIVISION OF WATER
On-line Water Well Log and Drilling Report

Casing Thickness Conversion Chart

Casing Diameter	SDR 21	SDR 17	SDR 26	Sch40	Sch80
2 inches	0.116	0.14		0.154	0.218
4 inches	0.214	0.265	0.173	0.237	0.337
5 inches	0.265	0.327	0.214	0.258	0.375
6 inches	0.316	0.39	0.255	0.28	0.0432
8 inches	0.41	0.508	0.332	0.322	0.5
10 inches	0.511	0.632	0.413	0.365	0.593
12 inches	0.606	0.75	0.49	0.406	0.687
14 inches	0.667
16 inches	0.762		0.616	0.5	0.843