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Metric To Standard Wrench Conversion Chart

We all have a mix of wrenches in our tool boxes. Some of us have a lot of SAE, others have a full range of metric and most of us have a balanced mix of both.

Whatever your setup, our wrench conversion chart will tell you the best fitting standard or metric wrench to use for any given bolt.

 

Metric / Standard Wrench Conversion Chart

Bolt Diameter Metric Standard
1/8" 8mm 5/16"
3/16" 10mm 3/8"
1/4" 11mm 7/16"
5/16" 13mm 1/2"
3/8" 14mm 9/16"
7/16" 16mm 5/8"
1/2" 19mm 3/4"
9/16" 21mm 13/16"
22mm 7/8"
5/8" 24mm 15/16"
25mm 1"
3/4" 29mm 1-1/8"
32mm 1-1/4"
7/8" 34mm 1-5/16"
35mm 1-3/8"
1" 38 mm 1-1/2"
41mm 1-5/8"
1-1/8" 43mm 1-11/16"
45mm 1-3/4"
1-1/4" 48mm 1-7/8"
1-3/8" 51mm 2"
1-1/2" 57mm 2-1/4"
1-5/8" 64mm 2-1/2"
1-3/4" 67mm 2-5/8"
70mm 2-3/4"
1-7/8" 75mm 2-15/16"
76mm 3"
2" 80mm 3-1/8"
83mm 3-1/4"
2-1/4" 89mm 3-1/2"
95mm 3-3/4"
2-1/2" 99mm 3-7/8"
102mm 4"
2-3/4" 108mm 4-1/4"
114mm 4-1/2"
3" 118mm 4-5/8"
3-1/4" 127mm 5"
3-1/2" 137mm 5-3/8"
140mm 5-1/2"
3-3/4" 146mm 5-3/4"
152mm 6"
165mm 6-1/2"
178mm 7"

 

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