To determine the theoretical weight of a coil, measure the ID and OD of the coil. Determine the PIW from the chart on the right. Then multiply the PIW by the width of the coil in inches.
Used for information only – not accurate in determining functionality.
| Outer Diameter | 16" Inside Diameter weight per inch | 20" Inside Diameter weight per inch |
| 22" | 51 | 19 |
| 23" | 61 | 29 |
| 24" | 72 | 40 |
| 25" | 83 | 50 |
| 26" | 94 | 62 |
| 27" | 106 | 74 |
| 28" | 119 | 86 |
| 29" | 132 | 99 |
| 30" | 145 | 112 |
| 31" | 158 | 125 |
| 32" | 172 | 140 |
| 33" | 186 | 154 |
| 34" | 202 | 169 |
| 35" | 217 | 185 |
| 36" | 233 | 201 |
| 37" | 250 | 217 |
| 38" | 266 | 234 |
| 39" | 283 | 251 |
| 40" | 302 | 269 |
| 41" | 320 | 287 |
| 42" | 338 | 306 |
| 43" | 357 | 325 |
| 44" | 376 | 344 |
| 45" | 396 | 364 |
| 46" | 417 | 384 |
| 47" | 438 | 405 |
| 48" | 459 | 426 |
| 49" | 480 | 448 |
| 50" | 503 | 471 |
| 51" | 525 | 493 |
| 52" | 548 | 516 |
| 53" | 572 | 540 |
| 54" | 596 | 560 |
| 55" | 616 | 584 |
| 56" | 640 | 609 |
| 57" | 666 | 634 |
| 58" | 690 | 659 |
| 59" | 717 | 685 |
| 60" | 744 | 711 |
| 61" | 771 | 739 |
| 62" | 799 | 766 |
| 63" | 826 | 794 |
| 64" | 854 | 822 |
| 65" | 883 | 851 |
| 66" | 912 | 880 |
| 67" | 942 | 910 |
| 68" | 972 | 940 |
| 69" | 1003 | 970 |
| 70" | 1034 | 1001 |