The Chicago Plumbing Code

Fractional Inches to Decimal Inches

Fraction Decimal Inches Millimeters
164 0.015625 0.396875
132 0.03125 0.79375
364 0.046875 1.190625
116 0.0625 1.5875
564 0.078125 1.984375
332 0.09375 2.38125
764 0.109375 2.778125
18 0.125 3.175
964 0.140625 3.571875
532 0.15625 3.96875
1164 0.171875 4.365625
316 0.1875 4.7625
1364 0.203125 5.159375
732 0.21875 5.55625
1564 0.234375 5.953125
14 0.25 6.35
1764 0.265625 6.746875
932 0.28125 7.14375
1964 0.296875 7.540625
516 0.3125 7.9375
2164 0.328125 8.334375
1132 0.34375 8.73125
2364 0.359375 9.128125
38 0.375 9.525
2564 0.390625 9.921875
1332 0.40625 10.31875
2764 0.421875 10.715625
716 0.4375 11.1125
2964 0.453125 11.509375
1532 0.46875 11.90625
3164 0.484375 12.303125
12 0.5 12.7
3364 0.515625 13.096875
1732 0.53125 13.49375
3564 0.546875 13.890625
916 0.5625 14.2875
3764 0.578125 14.684375
1932 0.59375 15.08125
3964 0.609375 15.478125
58 0.625 15.875
4164 0.640625 16.271875
2132 0.65625 16.66875
4364 0.671875 17.065625
1116 0.6875 17.4625
4564 0.703125 17.859375
2332 0.71875 18.25625
4764 0.734375 18.653125
34 0.75 19.05
4964 0.765625 19.446875
2532 0.78125 19.84375
5164 0.796875 20.240625
1316 0.8125 20.6375
5364 0.828125 21.034375
2732 0.84375 21.43125
5564 0.859375 21.828125
78 0.875 22.225
5764 0.890625 22.621875
2932 0.90625 23.01875
5964 0.921875 23.415625
1516 0.9375 23.8125
6164 0.953125 24.209375
3132 0.96875 24.60625
6364 0.984375 25.003125
1″ 1 25.4