Fractional Tubing Gage Chart

(All dimensions in inches)

O.D. SIZE WALL THEORETICAL I.D.
1/16 (.0625) .005
.007
.008
.010
.011
.013
.015
.016
.017
.018
.019
.021
.023
.024
.026
.053
.049
.047
.042
.040
.037
.033
.031
.030
.027
.024
.020
.016
.015
.010
3/32 (.093) .008
.011
.016
.020
.030
.032
.035
.077
.071
.061
.053
.033
.029
.023
1/8 (.125) .010
.014
.016
.020
.028
.031
.035
.042
.046
.053
.105
.098
.093
.085
.069
.064
.055
.041
.033
.020
5/32 (.156) .011
.013
.016
.020
.028
.035
.135
.130
.124
.116
.100
.086
3/16 (.187) 010
.014
.016
.020
.022
.025
.028
.035
.043
.049
.167
.159
.155
.147
.143
.137
.131
.117
.102
.089
1/4 (.250) .010
.016
.020
.028
.035
.049
.065
.230
.218
.210
.194
.180
.152
.120
5/16 (.312) .020
.028
.035
.049
.272
.256
.241
.215
3/8 (.375) .020
.028
.035
.049
.065
.335
.319
.305
.277
.245
1/2 (.500) .028
.035
.049
.065
.444
.430
.402
.370
5/8 (.625) .028
.035
.049
.058
.065
.569
.555
.527
.509
.495