Table of Contents
Wrench size charts are a great resource to help you quickly determine which size wrench you need for a particular job. Wrenches come in two types of sizing: Standard (or SAE) and Metric. In this article, we’ll look at a wrench size chart, wrenches according to socket sizes, and a standard-to-metric conversion chart.
Wrench Size Chart
This wrench size chart features both standard and metric wrench sizes from smallest to largest. The bolt diameter is the measurement between the two prongs of the wrench. Determine compatible nut and bolt sizes based on this diameter measurement.
| Standard and Metric Wrench Sizes |
|
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" | 38mm | 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" |
Standard Socket Sizes Chart
Now that you have an understanding of metric and standard wrench sizes, let’s take a look at standard socket sizes. These measurements refer to standard tools, bolts, and sockets.
| Standard Socket Sizes |
| 1/4" Drive | 3/8" Drive | 1/2" Drive | 3/4" Drive | 1" Drive |
| 5/32" | 1/4" | 3/8" | 7/8" | 1-5/8" |
| 3/16" | 5/16" | 7/16" | 15/16" | 1-11/16" |
| 7/32" | 3/8" | 1/2" | 1" | 1-3/4" |
| 1/4" | 7/16" | 9/16" | 1-1/16" | 1-13/16" |
| 9/32" | 1/2" | 19/32" | 1-1/8" | 1-7/8" |
| 5/16" | 9/16" | 5/8" | 1-3/16" | 2" |
| 11/32" | 5/8" | 21/32" | 1-1/4" | 2-1/8" |
| 3/8" | 11/16" | 11/16" | 1-5/16" | 2-3/16" |
| 7/16" | 3/4" | 3/4" | 1-3/8" | 2-1/4" |
| 1/2" | 13/16" | 25/32" | 1-7/16" | 2-3/8" |
| 9/16" | 7/8" | 13/16" | 1-1/2" | 2-1/2" |
| 15/16" | 7/8" | 1-5/8" | 2-5/8" | |
| 1" | 15/16" | 1-11/16" | 2-3/4" | |
| 1" | 1-3/4" | 2-15/16" | ||
| 1-1/16" | 1-13/16" | 3" | ||
| 1-1/8" | 1-7/8" | 3-1/8" | ||
| 1-3/16" | 2" | |||
| 1-1/4" | 2-1/8" | |||
| 1-1/2" | 2-3/16" | |||
| 2-1/4" |
Standard-to-Metric Conversion Chart
If you need to convert metric to standard sizing (or vice versa), utilize this next chart. It’s important to keep in mind that the size correlation may not be exact in some instances. This chart can be used for sockets, wrenches, and other tools.
| Standard to Metric Sizes |
| SAE Sizes | Metric Sizes | Similar Socket Sizes |
| 5/32" | 4mm | 5/32" and 4mm are almost the same |
| 4.5mm | ||
| 3/16" | ||
| 5mm | ||
| 5.5mm | ||
| 7/32" | ||
| 6mm | ||
| 1/4" | ||
| 6.5mm | ||
| 7mm | ||
| 9/32" | ||
| 5/16" | 5/16" and 8mm are almost the same | |
| 8mm | ||
| 11/32" | ||
| 9mm | ||
| 3/8" | ||
| 10mm | ||
| 13/32" | ||
| 11mm | 7/16" and 11mm are almost the same | |
| 7/16" | ||
| 15/32" | 15/32" and 12mm are almost the same | |
| 12mm | ||
| 1/2" | ||
| 13mm | ||
| 17/32" | ||
| 14mm | ||
| 9/16" | ||
| 15mm | 19/32" and 15mm are almost the same | |
| 19/32" | ||
| 5/8" | ||
| 16mm | ||
| 21/32" | ||
| 17mm | ||
| 11/16" | ||
| 18mm | ||
| 23/32" | 19mm | 3/4" and 19mm are almost the same |
| 3/4" | ||
| 25/32" | ||
| 20mm | ||
| 13/16" | ||
| 21mm | ||
| 27/32" | ||
| 22mm | ||
| 7/8" | ||
| 23mm | 29/32" and 23mm are almost the same | |
| 29/32" | ||
| 15/16" | ||
| 24mm |
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Product Compliance and Suitability
The product statements contained in this guide are intended for general informational purposes only. Such product statements do not constitute a product recommendation or representation as to the appropriateness, accuracy, completeness, correctness, or currentness of the information provided. Information provided in this guide does not replace the use by you of any manufacturer instructions, technical product manual, or other professional resource or adviser available to you. Always read, understand, and follow all manufacturer instructions.