Nominal NPT Pipe Size To Nominal Metric Size Conversion Chart

Nominal NPT Pipe Size To Nominal Metric Size Conversion Chart

NOMINAL NPT PIPE SIZE to
NOMINAL METRIC SIZE
CONVERSION CHART
NOMINAL PIPE SIZE
(INCHES/U.S.)
NOMINAL PIPE SIZE
(METRIC)
1/8" 6 mm
3/16" 7 mm
1/4" 8 mm
3/8" 10 mm
1/2" 15 mm
5/8" 18 mm
3/4" 20 mm
1" 25 mm
1-1/4" 32 mm
1-1/2" 40 mm
2" 50 mm
2-1/2" 65 mm
3" 80 mm
3-1/2" 90 mm
4" 100 mm
4-1/2" 115 mm
5" 125 mm
6" 150 mm