U.S. Code of Federal Regulations
Regulations most recently checked for updates: Aug 27, 2025
§ 51.322 - Metric conversion table.
| Inches
| Millimeters
(mm)
|
|---|
|
1/16 equals | 1.6
|
|
1/8 equals | 3.2
|
|
3/16 equals | 4.8
|
|
1/4 equals | 6.4
|
|
3/8 equals | 9.5
|
|
1/2 equals | 12.7
|
|
5/8 equals | 15.9
|
|
3/4 equals | 19.1
|
|
7/8 equals | 22.2
|
| 1
1/8 equals | 28.6
|
| 2
1/8 equals | 54.0
|
| 2
1/4 equals | 57.2
|
| 2
3/8 equals | 60.3
|
| 2
1/2 equals | 63.5
|
| 2
3/4 equals | 69.9 |
| Cubic Inches
| Cubic Centimeters (cc)
|
|---|
| 2100 equals | 34,412.7
|
| 2900 equals | 47,522.3 |
| Pounds
| Grams (g)
|
|---|
| 10 equals | 4,536.0
|
| 37 equals | 16,783.2
|
| 40 equals | 18,144.0 |
