Wrench Spanner Size Conversion Chart
The LRFIX Wrench Spanner Size Conversion Chart shows inch and millimeter conversions for selecting the correct wrench size.
| Standard (inches) | Metric (mm) |
|---|---|
| 1/8 | 3.18 mm |
| 5/32 | 3.97 mm |
| 4 mm | |
| 3/16 | 4.76 mm |
| 5 mm | |
| 13/64 | 5.16 mm |
| 7/32 | 5.56 mm |
| 15/64 | 6.05 mm |
| 6 mm | |
| 1/4 | 6.35 mm |
| 17/64 | 6.75 mm |
| 7 mm | |
| 9/32 | 7.14 mm |
| 5/16 | 7.94 mm |
| 8 mm | |
| 11/32 | 8.73 mm |
| 9 mm | |
| 3/8 | 9.53 mm |
| 10 mm | |
| 11 mm | |
| 7/16 | 11.11 mm |
| 15/32 | 11.91 mm |
| 12 mm | |
| 1/2 | 12.70 mm |
| 13 mm | |
| 17/32 | 13.49 mm |
| 14 mm | |
| 9/16 | 14.29 mm |
| 15 mm | |
| 19/32 | 15.08 mm |
| 5/8 | 15.88 mm |
| 16 mm | |
| 21/32 | 16.67 mm |
| 17 mm | |
| 11/16 | 17.46 mm |
| 18 mm | |
| 19 mm | |
| 3/4 | 19.05 mm |
| 25/32 | 19.84 mm |
| 20 mm | |
| 13/16 | 20.64 mm |
| 21 mm | |
| 22 mm | |
| 7/8 | 22.23 mm |
| 23 mm | |
| 29/32 | 23.02 mm |
| 15/16 | 23.81 mm |
| 24 mm | |
| 31/32 | 24.61 mm |
| 25 mm | |
| 1 | 25.40 mm |
| 26 mm |
Conversion Formula
- From Inches to Millimeters: Multiply by 25.4
- From Millimeters to Inches: Divide by 25.4
Wrench/Spanner Measurement Tips
Accurate measurement is key for proper wrench sizing. Use a caliper or ruler to measure the width of the wrench opening.
Ensure you measure from the inner edges for precision. If unsure about the size, check the manufacturer's specifications for your wrench.
Keeping tools clean and free from debris also helps achieve better accuracy when measuring.
