Conversion Charts

Length and Diameter Conversions

Inches Millimeters
1/4" 6.35 (6mm)
5/16" 7.9375 (8mm)
11/32" 8.7313 (9mm)
3/8" 9.525 (10mm)
7/16" 11.125 (11mm)
1/2" 12.7 (12mm)
9/16" 14.2875 (14mm)
5/8" 15.875 (16mm)
11/16" 17.4625 (17mm)
3/4" 19.05 (19mm)
13/16" 20.6375 (21mm)
7/8" 22.225 (22mm)
15/16" 23.1825 (23mm)
1" 25.4 (25mm)
1-1/8" 28.575 (29mm)
1-1/4" 31.75 (32mm)
1-3/8" 34.925 (35mm)
1-1/2" 38.1 (38mm)
1-5/8" 41.275 (41mm)
1-3/4" 44.45 (44mm)
1-7/8" 47.625 (48mm)
2" 50.8 (50mm)

Gauge Conversions

Gauge Millimeters
18g 1.0mm
16g 1.2mm
14g 1.6mm
12g 2.0mm
10g 2.5mm
8g 3.0mm
6g 4.0mm
4g 5.0mm
2g 6.0mm
0g 8.0mm
00g 10mm

Ball Size Conversions

Inches Millimeters
1/8" 3.0mm
5/32" 4.0mm
3/16" 5.0mm
1/4" 6.0mm
5/16" 8.0mm
3/8" 10mm