243:
537:
170:
550:
183:
955:
490:
126:
287:
215:
935:
797:: acceleration due to gravity (conventionally 9.80665 m/s but sometimes locally determined)
740:
402:
227:
828:
706:
368:
219:
231:
8:
615:
223:
939:
671:
340:
557:
520:) is a unit of pressure. It may be defined as the pressure exerted by a column of
190:
833:
723:
385:
153:
is a unit of pressure. It may be defined as the pressure exerted by a column of
239:
949:
838:
783:
650:
633:
596:
319:
305:
268:
247:
42:
890:
751:
629:
525:
301:
158:
891:
nist.gov – Guide for the Use of the
International System of Units (SI)
812:
808:
428:
64:
38:
533:
166:
902:
NOTE: Millimetre of water is also sometimes addressed as :
242:. This unit is commonly used to specify the pressure to which a
791:: density of water (conventionally 1000 kg/m at 4 °C)
529:
214:
The centimetre of water unit is frequently used to measure the
162:
861:
521:
235:
154:
238:
water column). It is also a common unit of pressure in the
816:
689:
354:
750:
In limited and largely historic contexts it may vary with
609:
O), metre water column (m.wc) or metre water gauge (m wg)
281:
O), metre water column (m wc) or metre water gauge (m wg)
570:, but conventionally a nominal maximum water density of
203:, but conventionally a nominal maximum water density of
807:The unit is often used to describe how much water
947:
857:NOTE: A centimetre of water is abbreviated as
886:
884:
226:, as well as determining pressures during
536:(temperature of maximum density) at the
169:(temperature of maximum density) at the
881:
948:
412:
48:
37:) are less commonly used measures of
896:
851:
13:
14:
967:
929:
538:standard acceleration of gravity
171:standard acceleration of gravity
936:Pressure conversion calculator
803:: water height in millimetres.
1:
844:
815:can take or how much water a
819:can resist without leaking.
7:
822:
10:
972:
602:
491:English Engineering units
486:
472:
468:
446:
434:
424:
419:
274:
127:English Engineering units
122:
108:
104:
82:
70:
60:
55:
904:millimetres water column
605:= 0.001 metre water (mH
246:machine is set after a
216:central venous pressure
754:, using the equation:
277:= 0.01 metre water (mH
228:mechanical ventilation
893:page 47, 2008 Edition
829:Millimetre of mercury
232:water supply networks
220:intracranial pressure
518:millimeter of water
514:Millimetre of water
463:... is equal to ...
420:millimetre of water
413:Millimetre of water
224:cerebrospinal fluid
151:centimetre of water
99:... is equal to ...
56:centimetre of water
49:Centimetre of water
35:millimeter of water
27:millimetre of water
940:Cornell University
496:
488:
480:
474:
132:
124:
116:
110:
956:Units of pressure
906:, abbreviated as
746:
745:
511:
510:
447:Conversions
408:
407:
234:(then usually in
147:
146:
83:Conversions
963:
923:
900:
894:
888:
879:
868:
855:
739:
738:
735:
722:
721:
718:
705:
704:
701:
688:
687:
684:
674:
669:
666:
649:
648:
645:
628:
627:
592:
591:O (conventional)
583:
582:
577:
574:is used, giving
573:
569:
565:
561:
554:
547:
507:
505:
502:
497:
489:
481:
475:
417:
416:
401:
400:
397:
384:
383:
380:
367:
366:
353:
352:
339:
338:
335:
318:
317:
300:
299:
264:
263:O (conventional)
255:
254:
210:
207:is used, giving
206:
202:
198:
194:
187:
180:
143:
141:
138:
133:
125:
117:
111:
53:
52:
16:Unit of pressure
971:
970:
966:
965:
964:
962:
961:
960:
946:
945:
932:
927:
926:
915:
901:
897:
889:
882:
875:
865:
860:
856:
852:
847:
834:Inch of mercury
825:
736:
733:
731:
719:
716:
714:
702:
699:
697:
685:
682:
680:
667:
664:
662:
654:
646:
643:
641:
625:
623:
608:
590:
586:
575:
571:
567:
564:9.8063754138 Pa
563:
556:
549:
545:
541:
503:
500:
498:
495:
487:
479:
473:
455:
441:
415:
398:
395:
393:
381:
378:
376:
364:
362:
350:
348:
336:
333:
331:
323:
315:
313:
297:
295:
280:
262:
258:
240:speech sciences
222:while sampling
208:
204:
200:
197:98.063754138 Pa
196:
189:
182:
178:
174:
139:
136:
134:
131:
123:
115:
109:
91:
77:
51:
17:
12:
11:
5:
969:
959:
958:
944:
943:
931:
930:External links
928:
925:
924:
913:
895:
880:
873:
863:
849:
848:
846:
843:
842:
841:
836:
831:
824:
821:
805:
804:
798:
792:
786:
782:: pressure in
777:
774:
748:
747:
744:
743:
727:
726:
710:
709:
693:
692:
676:
675:
658:
657:
652:
637:
636:
619:
618:
611:
610:
606:
603:
600:
599:
593:
588:
562:× 1 mm =
543:
509:
508:
493:
484:
483:
477:
470:
469:
466:
465:
460:
453:
449:
448:
444:
443:
439:
436:
432:
431:
426:
422:
421:
414:
411:
410:
409:
406:
405:
389:
388:
372:
371:
358:
357:
344:
343:
327:
326:
321:
309:
308:
291:
290:
283:
282:
278:
275:
272:
271:
265:
260:
176:
145:
144:
129:
120:
119:
113:
106:
105:
102:
101:
96:
89:
85:
84:
80:
79:
75:
72:
68:
67:
62:
58:
57:
50:
47:
15:
9:
6:
4:
3:
2:
968:
957:
954:
953:
951:
941:
937:
934:
933:
921:
917:
909:
905:
899:
892:
887:
885:
877:
869:
867:
854:
850:
840:
839:Inch of water
837:
835:
832:
830:
827:
826:
820:
818:
814:
810:
802:
799:
796:
793:
790:
787:
785:
781:
778:
775:
772:
768:
764:
760:
757:
756:
755:
753:
742:
729:
728:
725:
712:
711:
708:
695:
694:
691:
678:
677:
673:
660:
659:
656:
639:
638:
635:
631:
621:
620:
617:
613:
612:
604:
601:
598:
594:
585:
584:
581:
580:
579:
559:
552:
546:O (4 °C)
539:
535:
531:
527:
523:
519:
516:(US spelling
515:
494:
492:
485:
478:
471:
467:
464:
461:
459:
451:
450:
445:
437:
433:
430:
427:
423:
418:
404:
391:
390:
387:
374:
373:
370:
360:
359:
356:
346:
345:
342:
329:
328:
325:
311:
310:
307:
303:
293:
292:
289:
285:
284:
276:
273:
270:
266:
257:
256:
253:
252:
251:
249:
248:polysomnogram
245:
241:
237:
233:
229:
225:
221:
217:
212:
192:
185:
172:
168:
164:
160:
156:
152:
130:
128:
121:
114:
107:
103:
100:
97:
95:
87:
86:
81:
73:
69:
66:
63:
59:
54:
46:
44:
43:pressure head
41:based on the
40:
36:
32:
29:(US spelling
28:
24:
19:
919:
911:
907:
903:
898:
871:
858:
853:
806:
800:
794:
788:
779:
770:
766:
762:
758:
749:
517:
513:
512:
462:
457:
425:Unit of
213:
150:
148:
98:
93:
61:Unit of
34:
30:
26:
22:
20:
18:
752:temperature
506:10 psi
142:10 psi
845:References
595:= 9.80665
576:9.80665 Pa
568:9.80638 Pa
540:, so that
532:at 4
482:9.80665 Pa
452:1 mmH
267:= 98.0665
209:98.0665 Pa
201:98.0638 Pa
173:, so that
118:98.0665 Pa
88:1 cmH
45:of water.
31:centimeter
23:centimetre
813:outerwear
811:or other
572:1000 kg/m
205:1000 kg/m
195:× 1 cm =
950:Category
823:See also
809:rainwear
670:10
551:999.9720
476:SI units
429:Pressure
184:999.9720
112:SI units
65:Pressure
39:pressure
942:website
597:pascals
558:9.80665
269:pascals
191:9.80665
179:O (4°C)
773:/1000,
614:= 0.1
530:height
458:in ...
435:Symbol
236:metres
230:or in
218:, the
163:height
94:in ...
71:Symbol
918:, or
776:where
732:0.001
715:0.002
698:0.073
681:0.073
663:9.678
642:0.039
624:0.098
616:cm wg
587:1 mmH
542:1 mmH
524:of 1
522:water
499:1.422
394:0.014
377:0.028
369:mm Hg
363:0.735
349:0.735
332:0.000
314:0.393
296:0.980
288:mm wg
286:= 10
259:1 cmH
175:1 cmH
165:at 4
157:of 1
155:water
135:1.422
920:mmwc
908:mmwg
872:cm H
817:tent
724:inHg
707:mmHg
690:torr
630:mbar
626:0665
553:kg/m
386:inHg
365:5591
355:torr
351:5592
337:8411
316:7008
302:mbar
244:CPAP
186:kg/m
938:at
912:mmH
870:or
741:psi
737:334
734:422
720:902
717:895
700:555
683:555
672:atm
665:411
651:inH
644:370
634:hPa
632:or
560:m/s
528:in
501:334
438:mmH
403:psi
396:223
379:959
341:atm
334:967
320:inH
306:hPa
304:or
298:665
193:m/s
161:in
137:334
74:cmH
33:or
25:or
952::
910:,
883:^
859:cm
784:Pa
761:=
730:≈
713:≈
703:91
696:≈
686:92
679:≈
661:≈
647:08
640:≈
622:=
578:.
566:≈
555:×
548:=
534:°C
526:mm
456:O
399:34
392:≈
382:02
375:≈
361:≈
347:≈
330:≈
312:≈
294:=
250:.
211:.
199:≈
188:×
181:=
167:°C
159:cm
149:A
92:O
21:A
922:.
916:O
914:2
878:.
876:O
874:2
866:O
864:2
862:H
801:h
795:g
789:ρ
780:P
771:h
769:·
767:g
765:·
763:ρ
759:P
668:×
655:O
653:2
607:2
589:2
544:2
504:×
454:2
442:O
440:2
324:O
322:2
279:2
261:2
177:2
140:×
90:2
78:O
76:2
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