US to Metric

U.S. to Metric Conversion Charts

Gauge Approximation Chart

18 Gauge = 1mm

16 Gauge = 1.2mm

14 Gauge = 1.6mm

12 Gauge = 2mm

10 Gauge = 2.4mm

8 Gauge = 3.2mm

6 Gauge = 4mm

4 Gauge = 5mm

2 Gauge = 6mm

0 Gauge = 8mm

00 Gauge = 10mm

Diameter Approximation Chart

1/4" = 6 or 7mm

5/16" = 8mm

3/8" = 9 or 10mm

7/16" = 11mm

1/2" = 12mm

9/16" = 14mm

5/8" = 16mm

3/4" = 19mm

7/8" = 22mm

1" = 25mm

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