Look up a low pressure in inches of water column to find the conversion value in millimetres of water, millibar, pounds per square inch or millimetres of mercury.
Alternatively you can use the pressure unit converter to calculate the equivalent inches of water gauge value in other units.
The mmHg pressure units shown below are for mercury at 0°C, (32°F). The inH2O and mmH2O pressure units shown below are for water at 4°C (39.2°F).
inH2O low range pressure measurement products
- Low range vacuum pressure logger for 0 to -60 inH2O g
- 1.5 inWG differential pressure transducer to control positive pressure inside a building
- +/- 1 inH2O compound range pressure sensor
- 40 inH2O g OEM pressure transmitter with 4-20mA current output
inH2O Conversion Table
inH2O | mmH2O | mbar | psi | mmHg |
---|---|---|---|---|
0.1 | 2.54 | 0.249 | 0.004 | 0.187 |
0.2 | 5.08 | 0.498 | 0.007 | 0.374 |
0.3 | 7.62 | 0.747 | 0.011 | 0.560 |
0.4 | 10.16 | 0.996 | 0.014 | 0.747 |
0.5 | 12.70 | 1.245 | 0.018 | 0.934 |
0.6 | 15.24 | 1.495 | 0.022 | 1.121 |
0.7 | 17.78 | 1.744 | 0.025 | 1.308 |
0.8 | 20.32 | 1.993 | 0.029 | 1.495 |
0.9 | 22.86 | 2.242 | 0.033 | 1.681 |
1 | 25.40 | 2.491 | 0.036 | 1.868 |
2 | 50.80 | 4.982 | 0.072 | 3.737 |
3 | 76.20 | 7.473 | 0.108 | 5.605 |
4 | 101.6 | 9.964 | 0.145 | 7.473 |
5 | 127.0 | 12.45 | 0.181 | 9.342 |
6 | 152.4 | 14.95 | 0.217 | 11.21 |
7 | 177.8 | 17.44 | 0.253 | 13.08 |
8 | 203.2 | 19.93 | 0.289 | 14.95 |
9 | 228.6 | 22.42 | 0.325 | 16.81 |
10 | 254.0 | 24.91 | 0.361 | 18.68 |
11 | 279.4 | 27.40 | 0.397 | 20.55 |
12 | 304.8 | 29.89 | 0.434 | 22.42 |
13 | 330.2 | 32.38 | 0.470 | 24.29 |
14 | 355.6 | 34.87 | 0.506 | 26.16 |
15 | 381.0 | 37.36 | 0.542 | 28.02 |
16 | 406.4 | 39.85 | 0.578 | 29.89 |
17 | 431.8 | 42.35 | 0.614 | 31.76 |
18 | 457.2 | 44.84 | 0.650 | 33.63 |
19 | 482.6 | 47.33 | 0.686 | 35.50 |
20 | 508.0 | 49.82 | 0.723 | 37.37 |
21 | 533.4 | 52.31 | 0.759 | 39.23 |
22 | 558.8 | 54.80 | 0.795 | 41.10 |
23 | 584.2 | 57.29 | 0.831 | 42.97 |
24 | 609.6 | 59.78 | 0.867 | 44.84 |
25 | 635.0 | 62.27 | 0.903 | 46.71 |
26 | 660.4 | 64.76 | 0.939 | 48.58 |
27 | 685.8 | 67.25 | 0.975 | 50.44 |
28 | 711.2 | 69.74 | 1.012 | 52.31 |
29 | 736.6 | 72.24 | 1.048 | 54.18 |
30 | 762.0 | 74.73 | 1.084 | 56.05 |
31 | 787.4 | 77.22 | 1.120 | 57.92 |
32 | 812.8 | 79.71 | 1.156 | 59.79 |
33 | 838.2 | 82.20 | 1.192 | 61.65 |
34 | 863.6 | 84.69 | 1.228 | 63.52 |
35 | 889.0 | 87.18 | 1.264 | 65.39 |
36 | 914.4 | 89.67 | 1.301 | 67.26 |
37 | 939.8 | 92.16 | 1.337 | 69.13 |
38 | 965.2 | 94.65 | 1.373 | 71.00 |
39 | 990.6 | 97.14 | 1.409 | 72.86 |
40 | 1016 | 99.64 | 1.445 | 74.73 |
41 | 1041 | 102.1 | 1.481 | 76.60 |
42 | 1067 | 104.6 | 1.517 | 78.47 |
43 | 1092 | 107.1 | 1.553 | 80.34 |
44 | 1118 | 109.6 | 1.590 | 82.21 |
45 | 1143 | 112.1 | 1.626 | 84.07 |
46 | 1168 | 114.6 | 1.662 | 85.94 |
47 | 1194 | 117.1 | 1.698 | 87.81 |
48 | 1219 | 119.6 | 1.734 | 89.68 |
49 | 1245 | 122.1 | 1.770 | 91.55 |
50 | 1270 | 124.5 | 1.806 | 93.42 |
51 | 1295 | 127.0 | 1.842 | 95.28 |
52 | 1321 | 129.5 | 1.879 | 97.15 |
53 | 1346 | 132.0 | 1.915 | 99.02 |
54 | 1372 | 134.5 | 1.951 | 100.9 |
55 | 1397 | 137.0 | 1.987 | 102.8 |
56 | 1422 | 139.5 | 2.023 | 104.6 |
57 | 1448 | 142.0 | 2.059 | 106.5 |
58 | 1473 | 144.5 | 2.095 | 108.4 |
59 | 1499 | 147.0 | 2.132 | 110.2 |
60 | 1524 | 149.5 | 2.168 | 112.1 |
61 | 1549 | 151.9 | 2.204 | 114.0 |
62 | 1575 | 154.4 | 2.240 | 115.8 |
63 | 1600 | 156.9 | 2.276 | 117.7 |
64 | 1626 | 159.4 | 2.312 | 119.6 |
65 | 1651 | 161.9 | 2.348 | 121.4 |
66 | 1676 | 164.4 | 2.384 | 123.3 |
67 | 1702 | 166.9 | 2.421 | 125.2 |
68 | 1727 | 169.4 | 2.457 | 127.0 |
69 | 1753 | 171.9 | 2.493 | 128.9 |
70 | 1778 | 174.4 | 2.529 | 130.8 |
71 | 1803 | 176.9 | 2.565 | 132.7 |
72 | 1829 | 179.3 | 2.601 | 134.5 |
73 | 1854 | 181.8 | 2.637 | 136.4 |
74 | 1880 | 184.3 | 2.673 | 138.3 |
75 | 1905 | 186.8 | 2.710 | 140.1 |
76 | 1930 | 189.3 | 2.746 | 142.0 |
77 | 1956 | 191.8 | 2.782 | 143.9 |
78 | 1981 | 194.3 | 2.818 | 145.7 |
79 | 2007 | 196.8 | 2.854 | 147.6 |
80 | 2032 | 199.3 | 2.890 | 149.5 |
81 | 2057 | 201.8 | 2.926 | 151.3 |
82 | 2083 | 204.3 | 2.962 | 153.2 |
83 | 2108 | 206.7 | 2.999 | 155.1 |
84 | 2134 | 209.2 | 3.035 | 156.9 |
85 | 2159 | 211.7 | 3.071 | 158.8 |
86 | 2184 | 214.2 | 3.107 | 160.7 |
87 | 2210 | 216.7 | 3.143 | 162.5 |
88 | 2235 | 219.2 | 3.179 | 164.4 |
89 | 2261 | 221.7 | 3.215 | 166.3 |
90 | 2286 | 224.2 | 3.251 | 168.1 |
91 | 2311 | 226.7 | 3.288 | 170.0 |
92 | 2337 | 229.2 | 3.324 | 171.9 |
93 | 2362 | 231.7 | 3.360 | 173.8 |
94 | 2388 | 234.1 | 3.396 | 175.6 |
95 | 2413 | 236.6 | 3.432 | 177.5 |
96 | 2438 | 239.1 | 3.468 | 179.4 |
97 | 2464 | 241.6 | 3.504 | 181.2 |
98 | 2489 | 244.1 | 3.540 | 183.1 |
99 | 2515 | 246.6 | 3.577 | 185.0 |
100 | 2540 | 249.1 | 3.613 | 186.8 |
110 | 2794 | 274.0 | 3.974 | 205.5 |
120 | 3048 | 298.9 | 4.335 | 224.2 |
130 | 3302 | 323.8 | 4.697 | 242.9 |
140 | 3556 | 348.7 | 5.058 | 261.6 |
150 | 3810 | 373.6 | 5.419 | 280.2 |
160 | 4064 | 398.5 | 5.780 | 298.9 |
170 | 4318 | 423.5 | 6.142 | 317.6 |
180 | 4572 | 448.4 | 6.503 | 336.3 |
190 | 4826 | 473.3 | 6.864 | 355.0 |
200 | 5080 | 498.2 | 7.225 | 373.7 |
210 | 5334 | 523.1 | 7.587 | 392.3 |
220 | 5588 | 548.0 | 7.948 | 411.0 |
230 | 5842 | 572.9 | 8.309 | 429.7 |
240 | 6096 | 597.8 | 8.671 | 448.4 |
250 | 6350 | 622.7 | 9.032 | 467.1 |
260 | 6604 | 647.6 | 9.393 | 485.8 |
270 | 6858 | 672.5 | 9.754 | 504.4 |
280 | 7112 | 697.4 | 10.12 | 523.1 |
290 | 7366 | 722.4 | 10.48 | 541.8 |
300 | 7620 | 747.3 | 10.84 | 560.5 |
310 | 7874 | 772.2 | 11.20 | 579.2 |
320 | 8128 | 797.1 | 11.56 | 597.9 |
330 | 8382 | 822.0 | 11.92 | 616.5 |
340 | 8636 | 846.9 | 12.28 | 635.2 |
350 | 8890 | 871.8 | 12.64 | 653.9 |
360 | 9144 | 896.7 | 13.01 | 672.6 |
370 | 9398 | 921.6 | 13.37 | 691.3 |
380 | 9652 | 946.5 | 13.73 | 710.0 |
390 | 9906 | 971.4 | 14.09 | 728.6 |
400 | 10160 | 996.4 | 14.45 | 747.3 |
To convert pressure from inH2O to a higher precision use this pressure unit converter.
inH2O low range pressure measurement products
- 4 to 20 inWG Adjustable Differential Pressure Switch
- 40 inH2O g OEM pressure transmitter with 4-20mA current output
- Minus 15 mbar (6 inH2O) range suction pressure transmitter
- -10 to +10 inH2O Air Pressure Sensor for Ventilation & Extraction