• hPa   mH₂O
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The hectopascal (hPa) is a commonly used unit for measuring atmospheric pressure, especially in meteorology. One hPa is equivalent to 100 pascals, making it a preferred measurement over pascals due to the convenient scale. Interestingly, 1 hPa is also equivalent to 1 millibar, a unit that was widely used before the adoption of the hectopascal. This equivalence makes it easy for transitioning instruments and readings in weather maps and reports.

Hectopascals play a crucial role in understanding atmospheric conditions, such as weather forecasting and studying phenomena like hurricanes or cyclones. Typically, sea-level pressure is around 1013 hPa, and deviations from this can indicate changing weather patterns, with lower pressures often associated with storm systems. This connection makes the hPa unit vital for predicting and understanding weather events globally.

Did you know?

A “meter of water @ 4°C” is a unique unit used primarily to measure pressure. At this specific temperature, water reaches its maximum density, and the pressure exerted by a one-meter column of water is approximately 9.81 kilopascals or 0.0979 atmospheres. This scenario represents the optimal conditions for standardizing pressure measurements because the physical properties of water are most stable, reducing variances in calculations.

This unit is especially important in fields like plumbing and hydraulics, where accurate pressure measurements are crucial. Understanding these principles can lead to better designs in water distribution systems, preventing common issues such as pipe bursts or inefficient water flow, ensuring systems operate safely and efficiently.

> Hectopascals to Meters of water @ 4°C Conversion Table

Hectopascals Meters of water @ 4°C
0 hPa 0 mH₂O
10 hPa 0.101972 mH₂O
20 hPa 0.203943 mH₂O
30 hPa 0.305915 mH₂O
40 hPa 0.407886 mH₂O
50 hPa 0.509858 mH₂O
60 hPa 0.61183 mH₂O
70 hPa 0.713801 mH₂O
80 hPa 0.815773 mH₂O
90 hPa 0.917745 mH₂O
100 hPa 1.01972 mH₂O
110 hPa 1.12169 mH₂O
120 hPa 1.22366 mH₂O
130 hPa 1.32563 mH₂O
140 hPa 1.4276 mH₂O
150 hPa 1.52957 mH₂O
160 hPa 1.63155 mH₂O
170 hPa 1.73352 mH₂O
180 hPa 1.83549 mH₂O
190 hPa 1.93746 mH₂O
200 hPa 2.03943 mH₂O
210 hPa 2.1414 mH₂O
220 hPa 2.24338 mH₂O
230 hPa 2.34535 mH₂O
240 hPa 2.44732 mH₂O
250 hPa 2.54929 mH₂O
260 hPa 2.65126 mH₂O
270 hPa 2.75323 mH₂O
280 hPa 2.85521 mH₂O
290 hPa 2.95718 mH₂O
300 hPa 3.05915 mH₂O
310 hPa 3.16112 mH₂O
320 hPa 3.26309 mH₂O
330 hPa 3.36506 mH₂O
340 hPa 3.46704 mH₂O
350 hPa 3.56901 mH₂O
360 hPa 3.67098 mH₂O
370 hPa 3.77295 mH₂O
380 hPa 3.87492 mH₂O
390 hPa 3.97689 mH₂O
400 hPa 4.07886 mH₂O
410 hPa 4.18084 mH₂O
420 hPa 4.28281 mH₂O
430 hPa 4.38478 mH₂O
440 hPa 4.48675 mH₂O
450 hPa 4.58872 mH₂O
460 hPa 4.69069 mH₂O
470 hPa 4.79267 mH₂O
480 hPa 4.89464 mH₂O
490 hPa 4.99661 mH₂O
500 hPa 5.09858 mH₂O
510 hPa 5.20055 mH₂O
520 hPa 5.30252 mH₂O
530 hPa 5.4045 mH₂O
540 hPa 5.50647 mH₂O
550 hPa 5.60844 mH₂O
560 hPa 5.71041 mH₂O
570 hPa 5.81238 mH₂O
580 hPa 5.91435 mH₂O
590 hPa 6.01633 mH₂O
600 hPa 6.1183 mH₂O
610 hPa 6.22027 mH₂O
620 hPa 6.32224 mH₂O
630 hPa 6.42421 mH₂O
640 hPa 6.52618 mH₂O
650 hPa 6.62816 mH₂O
660 hPa 6.73013 mH₂O
670 hPa 6.8321 mH₂O
680 hPa 6.93407 mH₂O
690 hPa 7.03604 mH₂O
700 hPa 7.13801 mH₂O
710 hPa 7.23999 mH₂O
720 hPa 7.34196 mH₂O
730 hPa 7.44393 mH₂O
740 hPa 7.5459 mH₂O
750 hPa 7.64787 mH₂O
760 hPa 7.74984 mH₂O
770 hPa 7.85181 mH₂O
780 hPa 7.95379 mH₂O
790 hPa 8.05576 mH₂O
800 hPa 8.15773 mH₂O
810 hPa 8.2597 mH₂O
820 hPa 8.36167 mH₂O
830 hPa 8.46364 mH₂O
840 hPa 8.56562 mH₂O
850 hPa 8.66759 mH₂O
860 hPa 8.76956 mH₂O
870 hPa 8.87153 mH₂O
880 hPa 8.9735 mH₂O
890 hPa 9.07547 mH₂O
900 hPa 9.17745 mH₂O
910 hPa 9.27942 mH₂O
920 hPa 9.38139 mH₂O
930 hPa 9.48336 mH₂O
940 hPa 9.58533 mH₂O
950 hPa 9.6873 mH₂O
960 hPa 9.78928 mH₂O
970 hPa 9.89125 mH₂O
980 hPa 9.99322 mH₂O
990 hPa 10.09519 mH₂O
1000 hPa 10.19716 mH₂O