Copper Pipe Sizes Chart

This is a Copper Pipe Sizes chart that gives you the approximate Inside dimension (ID) and wall thickness of copper pipes for 18 Nominal pipe sizes (NPS) including 3 types K, L, and M.

NPSOutside Diameter (OD) Pipe TypeInside Diameter (ID)Wall Thickness
1/40.375K0.3050.035
L0.3150.03
MN/AN/A
3/80.5K0.4020.049
L0.430.035
M0.450.025
1/20.625K0.5270.049
L0.5450.04
M0.5690.028
5/80.75K0.6520.049
L0.6660.042
MN/AN/A
3/40.875K0.7450.065
L0.7850.045
M0.8110.032
11.125K0.9950.065
L1.0250.05
M1.0550.035
1-1/41.375K1.2450.065
L1.2650.055
M1.2910.042
1-1/21.625K1.4810.072
L1.5050.06
M1.5270.049
22.125K1.9590.083
L1.9850.07
M2.0090.058
2-1/22.625K2.4350.095
L2.4650.08
M2.4950.065
33.125K2.9070.109
L2.9450.09
M2.9810.072
3.53.625K3.3850.12
L3.4250.1
M3.4590.083
44.125K3.8570.134
L3.8970.114
M3.9350.095
55.125K4.8050.16
L4.8750.125
M4.9070.109
66.125K5.7410.192
L5.8450.14
M5.8810.122
88.125K7.5830.271
L7.7250.2
M7.7850.17
1010.125K9.4490.38
L9.6250.25
M9.7010.212
1212.125K11.3150.405
L11.5650.28
M11.6170.254