Formulas for computing sheet weight
| LENGTH multiplied by WIDTH multiplied by THICKNESS divided by FACTOR = SHEET WEIGHT | ||
| Material | Specific Gravity* | Factor |
| ABS, Natural (unpigmented) ABS, Pigmented Acetate |
1.04 1.07 1.30 |
26.63 25.88 21.30 |
| Acrylic, cell & continuous cast Acrylic, Korad film Acrylic, Plexiglas DR |
1.19 1.17 1.15 |
23.27 23.67 24.08 |
| Acrylic, XT copolymer Acrylic/Vinyl "ACRYLIVIN" Butyrate |
1.11 1.31 1.19 |
24.95 21.14 23.27 |
| Polyphenylene Oxide (Noryl) Polycarbonate Polyethylene, LD |
1.09 1.20 .92 |
25.41 23.07 30.10 |
| Polyethylene, HD Polypropylene Propionate |
.96 .90 1.20 |
28.85 30.77 23.07 |
| Styrene Surlyn lonomer Vinyl "VHI" |
1.05 .94 1.41 |
26.37 29.46 19.64 |
| *These are averages. Specific Gravity varies with material. Check with material supplier, and then use formula below. | ||
Formula for computing weight per square foot
| SPECIFIC GRAVITY multiplied by 5.2 multiplied by THICKNESS = LBS. PER SQUARE FOOT |
Approximate yield in square inches for plastic materials of various thicknesses and specific gravities.
| Thickness of Film (inches) | |||||||||||
| Specific Gravity |
.001 | .003 | .005 | .0075 | .010 | .015 | .020 | .025 | .030 | .035 | .040 |
| .090 .092 .094 |
30,780 30,110 29,470 |
10,260 10,040 9,820 |
6,165 6,022 5,894 |
4,104 4,015 3,930 |
3,078 3,011 2,947 |
2,052 2,007 1,964 |
1,539 1,505 1,473 |
1,231 1,204 1,179 |
1,026 1,004 982 |
879 860 842 |
769 753 737 |
|
.096 .098 1.00 |
28,860 28,270 27,700 |
9,620 9,420 9,230 |
5,771 5,653 5,540 |
3,848 3,769 3,694 |
2,886 2,827 2,770 |
1,923 1,884 1,846 |
1,443 1,413 1,385 |
1,154 1,131 1,108 |
962 942 923 |
824 809 791 |
721 708 693 |
|
1.025 1.05 1.075 |
27,030 |
9,010 8,790 8,590 |
5,405 5,276 5,153 |
3,604 3,518 3,436 |
2,703 2,638 2,577 |
1,801 1,758 1,717 |
1,351 1,319 1,288 |
1,081 1,055 1,031 |
901 879 859 |
772 754 736 |
676 660 646 |
|
1.10 1.125 1.15 |
25,180 24,620 24,090 |
8,390 8,210 8,030 |
5,036 4,924 4,818 |
3,358 3,283 3,212 |
2,518 2,462 2,409 |
1,678 1,641 1,605 |
1,259 1,231 1,204 |
1,007 985 964 |
839 821 803 |
719 703 688 |
630 616 602 |
|
1.20 1.25 1.30 |
23,080 22,220 21,300 |
7,700 7,410 7,100 |
4,617 4,444 4,261 |
3,078 2,963 2,841 |
2,308 2,222 2,130 |
1,539 1,481 1,420 |
1,154 1,111 1,065 |
923 880 852 |
770 741 710 |
660 635 609 |
577 556 533 |
|
1.35 1.375 1.40 |
20,520 20,150 19,790 |
6,840 6,720 6,660 |
4,104 4,029 3,957 |
2,736 2,686 2,639 |
2,052 2,015 1,979 |
1,368 1,343 1,319 |
1,026 1,007 989 |
821 806 791 |
684 672 660 |
586 572 565 |
513 504 495 |
|
1.425 1.45 1.475 |
19,440 19,100 18,780 |
6,480 6,370 6,260 |
3,888 3,821 3,756 |
2,592 2,548 2,504 |
1,944 1,910 1,878 |
1,296 1,273 1,252 |
972 955 939 |
778 764 751 |
648 637 626 |
555 546 537 |
486 478 470 |
|
1.50 1.525 1.55 |
18,470 18,160 17,870 |
6,160 6,060 5,960 |
3,693 3,633 3,574 |
2,463 2,422 2,383 |
1,847 1,816 1,787 |
1,231 1,211 1,191 |
923 908 893 |
739 727 715 |
616 606 596 |
528 519 511 |
462 454 447 |
|
1.60 1.65 1.70 |
17,310 16,790 16,290 |
5,770 5,600 5,430 |
3,463 3,358 3,259 |
2,309 2,239 2,173 |
1,731 1,679 1,629 |
1,154 1,119 1,086 |
866 839 815 |
693 672 652 |
577 560 543 |
495 480 466 |
433 420 407 |
| Above weights are average and are not intended for specifications or pricing. Weights are based on natural color - pigmentation can vary weight by as much as 5-10% |
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© 1999 Plastics Marketing Company