Orifice Drill Size Chart
Orifice Drill Size Chart
We can plug and drill any size orifice
Conversion Chart
Natural | LP | ||||||
---|---|---|---|---|---|---|---|
Inches of H20 | 3 | 3.5 | 4 | 4.5 | 7 | 11 | |
Drill Size | Decimal Inches | BTU | BTU | BTU | BTU | BTU | BTU |
80 | 0.0135 | 428 | 463 | 495 | 525 | 654 | 1237 |
79 | 0.0145 | 494 | 534 | 571 | 605 | 755 | 1469 |
1/64 | 0.0156 | 572 | 534 | 661 | 701 | 874 | 1700 |
78 | 0.016 | 602 | 650 | 695 | 737 | 919 | 1788 |
77 | 0.018 | 762 | 823 | 879 | 933 | 1163 | 2263 |
76 | 0.02 | 940 | 1016 | 1086 | 1152 | 1436 | 2794 |
75 | 0.021 | 1037 | 1120 | 1197 | 1270 | 1583 | 3081 |
74 | 0.0225 | 1190 | 1285 | 1374 | 1457 | 1818 | 3536 |
73 | 0.024 | 1354 | 1462 | 1563 | 1658 | 2068 | 4024 |
72 | 0.025 | 1469 | 1587 | 1696 | 1799 | 2244 | 4366 |
71 | 0.026 | 1589 | 1716 | 1835 | 1946 | 2427 | 4722 |
70 | 0.028 | 1843 | 1991 | 2128 | 2257 | 2815 | 5476 |
69 | 0.0292 | 2004 | 2165 | 2314 | 2455 | 3062 | 5956 |
68 | 0.031 | 2259 | 2440 | 2608 | 2767 | 3451 | 6713 |
1/32 | 0.0313 | 2303 | 2487 | 2659 | 2820 | 3518 | 6843 |
67 | 0.032 | 2407 | 2600 | 2779 | 2948 | 3677 | 7153 |
66 | 0.033 | 2560 | 2765 | 2956 | 3135 | 3910 | 7607 |
65 | 0.035 | 2880 | 3110 | 3325 | 3527 | 4399 | 8557 |
64 | 0.036 | 3046 | 3291 | 3518 | 3731 | 4654 | 9053 |
63 | 0.037 | 3218 | 3476 | 3716 | 3941 | 4916 | 9563 |
62 | 0.038 | 3394 | 3666 | 3919 | 4157 | 5185 | 10087 |
61 | 0.039 | 3575 | 3862 | 4128 | 4379 | 5461 | 10625 |
60 | 0.04 | 3761 | 4062 | 4343 | 4606 | 5745 | 11176 |
59 | 0.041 | 3951 | 4268 | 4563 | 4840 | 6036 | 11742 |
58 | 0.042 | 4147 | 4479 | 4788 | 5078 | 6334 | 12322 |
57 | 0.043 | 4346 | 4695 | 5019 | 5323 | 6639 | 12916 |
56 | 0.0465 | 5083 | 5490 | 5869 | 6225 | 7764 | 15104 |
3/64 | 0.0469 | 5171 | 5585 | 5970 | 6333 | 7898 | 15365 |
55 | 0.052 | 6356 | 6865 | 7339 | 7785 | 9709 | 18888 |
54 | 0.055 | 7111 | 7680 | 8211 | 8709 | 10862 | 21131 |
53 | 0.0595 | 8322 | 8989 | 9609 | 10192 | 12712 | 24730 |
1/16 | 0.0625 | 9182 | 9918 | 10603 | 11246 | 14026 | 27286 |
52 | 0.0635 | 9478 | 10238 | 10945 | 11609 | 14479 | 28167 |
51 | 0.067 | 10552 | 11398 | 12184 | 12924 | 16119 | 31357 |
50 | 0.07 | 11518 | 12441 | 13300 | 14107 | 17594 | 34228 |
49 | 0.073 | 12527 | 13530 | 14464 | 15342 | 19135 | 37225 |
48 | 0.076 | 13577 | 14665 | 15678 | 16629 | 20740 | 40347 |
5/64 | 0.0781 | 14338 | 15487 | 16556 | 17560 | 21902 | 42608 |
47 | 0.0785 | 14485 | 15646 | 16726 | 17741 | 22127 | 43045 |
46 | 0.081 | 15423 | 16658 | 17809 | 18889 | 23558 | 45831 |
45 | 0.082 | 15806 | 17072 | 18251 | 19358 | 24144 | 46969 |
44 | 0.086 | 17385 | 18778 | 20075 | 21293 | 26557 | 51663 |
43 | 0.089 | 18620 | 20111 | 21500 | 22804 | 28442 | 55331 |
42 | 0.0935 | 20550 | 22197 | 23729 | 25168 | 31391 | 61067 |
3/32 | 0.0938 | 20682 | 22339 | 23882 | 25330 | 31592 | 61460 |
41 | 0.096 | 21664 | 23399 | 25015 | 26532 | 33092 | 64377 |
40 | 0.098 | 22576 | 24384 | 26068 | 27649 | 34485 | 67087 |
39 | 0.0995 | 23272 | 25137 | 26872 | 28502 | 35549 | 69156 |
38 | 0.1015 | 24217 | 26157 | 27963 | 29660 | 36992 | 71964 |
37 | 0.104 | 25425 | 27462 | 29358 | 31139 | 38837 | 75553 |
36 | 0.1065 | 26662 | 28798 | 30786 | 32654 | 40726 | 79229 |
7/64 | 0.1094 | 28133 | 28798 | 32486 | 34456 | 42975 | 83603 |
35 | 0.11 | 28443 | 30722 | 32843 | 34835 | 43447 | 84522 |
34 | 0.111 | 28962 | 31283 | 33443 | 35472 | 44241 | 86066 |
33 | 0.113 | 30015 | 32420 | 34659 | 36761 | 45849 | 89195 |
32 | 0.116 | 31630 | 34165 | 36524 | 38739 | 48316 | 93994 |
31 | 0.12 | 33849 | 36562 | 39086 | 41457 | 51706 | 100588 |
1/8 | 0.125 | 36729 | 39672 | 42411 | 44984 | 56104 | 109145 |
30 | 0.1285 | 38815 | 41924 | 44819 | 47538 | 59290 | 115343 |
29 | 0.136 | 43478 | 46961 | 50204 | 53249 | 66413 | 129200 |
28 | 0.1405 | 46402 | 50120 | 53581 | 56831 | 70881 | 137892 |
9/64 | 0.1406 | 46469 | 50192 | 53657 | 56912 | 70982 | 138088 |
27 | 0.144 | 48743 | 52649 | 56284 | 59698 | 74456 | 144847 |
26 | 0.147 | 50795 | 54865 | 58653 | 62211 | 77591 | 150946 |
25 | 0.1495 | 52538 | 56747 | 60665 | 64345 | 80253 | 156123 |
24 | 0.152 | 54309 | 58661 | 62711 | 66515 | 82959 | 161389 |
23 | 0.154 | 55748 | 60215 | 64372 | 68277 | 85157 | 165664 |
5/32 | 0.1563 | 57426 | 62027 | 66309 | 70332 | 87719 | 170649 |
22 | 0.157 | 57941 | 62584 | 66905 | 70963 | 88507 | 172181 |
21 | 0.159 | 59427 | 64188 | 68620 | 72783 | 90776 | 176596 |
20 | 0.161 | 60931 | 65813 | 70357 | 74625 | 93074 | 181066 |
19 | 0.166 | 64775 | 69965 | 74795 | 79332 | 98945 | 192487 |
18 | 0.1695 | 67535 | 72946 | 77982 | 82713 | 103161 | 200690 |
11/64 | 0.1719 | 69461 | 75026 | 80206 | 85072 | 106103 | 206413 |
17 | 0.173 | 70353 | 75990 | 81236 | 86164 | 107465 | 209063 |
16 | 0.177 | 73644 | 79544 | 85036 | 90195 | 112492 | 218843 |
15 | 0.18 | 76161 | 82263 | 87943 | 93278 | 116338 | 226324 |
14 | 0.182 | 77863 | 84102 | 89908 | 95362 | 118938 | 231381 |
13 | 0.185 | 80451 | 86897 | 92897 | 98532 | 122891 | 239072 |
3/16 | 0.1875 | 82640 | 89261 | 95425 | 101213 | 126235 | 245577 |
12 | 0.189 | 83968 | 90695 | 96957 | 102839 | 128263 | 249522 |
11 | 0.191 | 85754 | 92625 | 99020 | 105027 | 130992 | 254831 |
10 | 0.1935 | 88014 | 95066 | 101629 | 107794 | 134443 | 261546 |
9 | 0.196 | 90303 | 97538 | 104272 | 110598 | 137940 | 268348 |
8 | 0.199 | 93088 | 100547 | 107489 | 114009 | 142194 | 276625 |
7 | 0.201 | 94969 | 102578 | 109660 | 116312 | 145067 | 282213 |
13/64 | 0.2031 | 96963 | 104732 | 111964 | 118755 | 148114 | 288141 |
6 | 0.204 | 97825 | 105663 | 112958 | 119810 | 149430 | 290701 |
5 | 0.2055 | 99269 | 107222 | 114626 | 121579 | 151635 | 294991 |
4 | 0.209 | 102679 | 110906 | 118563 | 125755 | 156844 | 305125 |
3 | 0.213 | 106647 | 115192 | 123145 | 130615 | 162906 | 316916 |
7/32 | 0.2188 | 112534 | 121550 | 129943 | 137825 | 171898 | 334411 |
2 | 0.221 | 114808 | 124007 | 132569 | 140611 | 175372 | 341169 |
1 | 0.228 | 122196 | 131987 | 141100 | 149659 | 186658 | 363124 |