American Wrench Size Chart
American wrenches are also sometimes called end wrenches. So this can also be considered an end wrench size chart. Generally, you will have to consider socket sizes and wrench sizes if your hobby or business requires a need for these tools. The next, also the well-known fact is that wrench sizes are much more comfortable and more straightforward to understand. There is no difference in ratchet size, which simply makes this process even more accessible. The secret here is that you need to adapt the wrench size according to your business. For instance, if you are a car mechanic, you will generally need bigger wrenches. If you are a bicycle repairman, you will need smaller ones.
Wrench sizes are commonly displayed in SAE, which is a standard size or in Metric size. To make the chart as useful as possible, we will present you with both variations and therefore assist you in choosing the wrench you need. Keep in mind that the NOTE section of the table is used to explain the ‘’close enough’’ size between SAE and metrics.
Here is our article about the best adjustable wrenches. You may be also interested in the best ratcheting wrench set.
Size/SAE in inches | Size in mm (metric) | Inches | Notes |
---|---|---|---|
5/32" | 0.156 | 5/32 inches are close to 4mm | |
4mm | 0.157 | ||
4.5mm | 0.177 | ||
3/16" | 0.188 | ||
5mm | 0.197 | ||
5.5mm | 0.216 | ||
7/32" | 0.219 | ||
6mm | 0.236 | ||
1/4" | 0.25 | ||
6.5mm | 0.256 | ||
7mm | 0.276 | ||
9/32" | 0.281 | ||
5/16" | 0.313 | 5/16 inches wrench is close to 8mm in size | |
8mm | 0.315 | ||
11/32" | 0.344 | ||
9mm | 0.354 | ||
3/8" | 0.375 | ||
10mm | 0.394 | ||
13/32" | 0.406 | ||
11mm | 0.433 | 7/16 inches SAE size is simillar to 8mm, Metric size | |
7/16" | 0.438 | ||
15/32" | 0.469 | 15/32 inches SAE size is simillar to 12mm, Metric size | |
12mm | 0.472 | ||
1/2" | 0.5 | ||
13mm | 0.512 | ||
17/32" | 0.531 | ||
14mm | 0.551 | ||
9/16" | 0.563 | ||
15mm | 0.591 | 19/32 inches SAE size is simillar to 15 mm, Metric size | |
19/32" | 0.594 | ||
5/8" | 0.625 | ||
16mm | 0.63 | ||
21/32" | 0.656 | ||
17mm | 0.669 | ||
11/16" | 0.688 | ||
18mm | 0.709 | ||
23/32" | 0.719 | ||
19mm | 0.748 | 3/4 inches SAE size is simillar to 19mm, Metric size | |
3/4" | 0.75 | ||
25/32" | 0.781 | ||
20mm | 0.787 | ||
13/16" | 0.813 | ||
21mm | 0.827 | ||
27/32" | 0.844 | ||
22mm | 0.866 | ||
7/8" | 0.875 | ||
23mm | 0.906 | 29/32 inches in SAE size is simillar or close enough to 23 mm (Metric size) | |
29/32" | 0.906 | ||
15/16" | 0.938 | ||
24mm | 0.945 | ||
25mm | 0.984 | ||
1" | 1 | ||
26mm | 1.024 | ||
1-1/16" | 1.063 | 1-1/16 inches is simillar to 27 mm | |
27mm | 1.063 | ||
28mm | 1.102 | ||
1-1/8" | 1.125 | ||
29mm | 1.142 | ||
30mm | 1.181 | ||
31mm | 1.221 | ||
1-1/4" | 1.25 | 1-1/4 inches is close to 32 mm | |
32mm | 1.256 | ||
33mm | 1.299 | ||
1-5/16" | 1.313 | ||
34mm | 1.339 | ||
1-3/8" | 1.375 | 1-3/8 inches and 35mm are close | |
35mm | 1.378 | ||
36mm | 1.417 | ||
1-7/16" | 1.438 | ||
37mm | 1.457 | ||
38mm | 1.496 | ||
1-1/2" | 1.5 | ||
39mm | 1.535 | ||
40mm | 1.575 | ||
41mm | 1.614 | ||
1-5/8" | 1.625 | ||
42mm | 1.654 | ||
1-11/16" | 1.688 | 1-11/16 inches in SAE size is simillar to 43mm in Metric | |
43mm | 1.693 | ||
44mm | 1.733 | ||
1-3/4" | 1.75 | ||
45mm | 1.772 | ||
46mm | 1.811 | ||
1-13/16" | 1.813 | ||
47mm | 1.85 | ||
1-7/8" | 1.875 | ||
48mm | 1.89 | ||
49mm | 1.923 | ||
50mm | 1.969 | ||
2" | 2 | 2" and 51mm are almost identical, 50.8mm is the exact value | |
51mm | 2.008 | ||
52mm | 2.047 | ||
2-1/16" | 2.063 | ||
53mm | 2.087 | ||
2-1/8" | 2.125 | 2-1/8 SAE inches and 54mm Metric are close enough | |
54mm | 2.126 | ||
55mm | 2.165 | ||
2-3/16" | 2.188 | ||
56mm | 2.205 | ||
57mm | 2.244 | ||
2-1/4" | 2.25 | ||
58mm | 2.283 | ||
59mm | 2.323 | ||
60mm | 2.362 | ||
2-3/8" | 2.375 | ||
61mm | 2.402 | ||
62mm | 2.441 | ||
63mm | 2.48 | ||
2-1/2" | 2.5 |
Bolt and Wrench Sizes
The next main thing to consider is the bolts you will do or undo using your wrenches. There are several differences in this case scenario, so we will explain to them using a table. Here you can see the diameter of a bolt, SAE size of a wrench you need for that particular bolt, and also Metric size wrench. Check out also our best digital torque wrenches review.
Diameter of a bolt (inches) | SAE wrench size in inches | Metric wrench size in mm |
---|---|---|
1/8 | 5/16 | 8 |
3/16 | 3/8 | 10 |
1/4 | 7/16 | 11 |
5/16 | 1/2 | 13 |
3/8 | 9/16 | 15 |
7/16 | 5/8 | 16 |
1/2 | 3/4 | 19 |
9/16 | 13/16 | 21 |
5/8 | 15/16 | 24 |
3/4 | 1-1/8 | 29 |
7/8 | 1-5/16 | 34 |
1 | 1-1/2 | 38 |
1-1/8 | 1-11/16 | 43 |
1-1/4 | 1-7/8 | 48 |
1-3/8 | 2-1/16 | 53 |
1-1/2 | 2-1/4 | 58 |
1-5/8 | 2-7/16 | 62 |
1-3/4 | 2-5/8 | 67 |
1-7/8 | 2-13/16 | 72 |
2 | 3 | 77 |
2-1/4 | 3-3/8 | 86 |
2-1/2 | 3-3/4 | 96 |
2-3/4 | 4-1/8 | 105 |
3 | 4-1/2 | 115 |