Nominal NPT Pipe Size To Nominal Metric Size Conversion Chart
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NOMINAL METRIC SIZE CONVERSION CHART |
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NOMINAL PIPE SIZE (INCHES/U.S.) |
NOMINAL PIPE SIZE (METRIC) |
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| 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 | |