| นิ้ว (เศษส่วน) | นิ้ว (ทศนิยม) | มิลลิเมตร |
| 1/64″ | 0,016″ | 0,397 mm |
| 1/32″ | 0,031″ | 0,794 mm |
| 1/16″ | 0,063″ | 1,587 mm |
| 1/8″ | 0,125″ | 3,175 mm |
| 1/4″ | 0,250 | 6,350 mm |
| 3/8″ | 0,375″ | 9,525 mm |
| 1/2″ | 0,500″ | 12,700 mm |
| 5/8″ | 0,625″ | 15,875 mm |
| 3/4″ | 0,750 | 19,050 mm |
| 7/8″ | 0,875″ | 22,225 mm |
| 1″ | 1″ | 25,400 mm |
| 1 1/4″ | 1,250″ | 31,750 mm |
| 1 1/2″ | 1,500″ | 38,100 mm |
| 1 3/4″ | 1,750″ | 44,450 mm |
| 2″ | 2″ | 50,800 mm |
| 2 1/4″ | 2,250″ | 57,150 mm |
| 2 1/2″ | 2,500″ | 63,500 mm |
| 2 3/4″ | 2,750″ | 69,850 mm |
| 3″ | 3″ | 76,200 mm |
| 3 1/4″ | 3,250″ | 82,550 mm |
| 3 1/2″ | 3,500″ | 88,900 mm |
| 3 3/4″ | 3,750″ | 95,250 mm |
| 4″ | 4″ | 101,60 mm |
| 4 1/4″ | 4,250″ | 107,95 mm |
| 4 1/2″ | 4,500″ | 114,30 mm |
| 4 3/4″ | 4,750″ | 120,65 mm |
| 5″ | 5″ | 127,00 mm |
| 6″ | 6″ | 152,40 mm |
| 7″ | 7″ | 177,80 mm |
| 8″ | 8″ | 203,20 mm |
| 9″ | 9″ | 228,60 mm |
| 10″ | 10″ | 254,00 mm |