The torr is a unit of pressure named after the Italian physicist Evangelista Torricelli, who invented the barometer in the 17th century. It is defined as 1/760th of an atmosphere, approximating the pressure exerted by a one-millimeter column of mercury at 0 degrees Celsius. What makes the torr particularly interesting is its practical use in fields like vacuum technology and weather forecasting, where precise measurements of atmospheric pressure are crucial.
The legacy of Torricelli’s work is integral to meteorology and physics, as it opened paths for understanding atmospheric pressure. Beyond scientific circles, the torr is a reminder of human ingenuity in unraveling atmospheric mysteries and continues to play a vital role in today’s scientific advancements.
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.
Torr | Hectopascals |
---|---|
0
torr
|
0
hPa
|
10
torr
|
13.33224
hPa
|
20
torr
|
26.66447
hPa
|
30
torr
|
39.99671
hPa
|
40
torr
|
53.32895
hPa
|
50
torr
|
66.66118
hPa
|
60
torr
|
79.99342
hPa
|
70
torr
|
93.32566
hPa
|
80
torr
|
106.65789
hPa
|
90
torr
|
119.99013
hPa
|
100
torr
|
133.32237
hPa
|
110
torr
|
146.65461
hPa
|
120
torr
|
159.98684
hPa
|
130
torr
|
173.31908
hPa
|
140
torr
|
186.65132
hPa
|
150
torr
|
199.98355
hPa
|
160
torr
|
213.31579
hPa
|
170
torr
|
226.64803
hPa
|
180
torr
|
239.98026
hPa
|
190
torr
|
253.3125
hPa
|
200
torr
|
266.64474
hPa
|
210
torr
|
279.97697
hPa
|
220
torr
|
293.30921
hPa
|
230
torr
|
306.64145
hPa
|
240
torr
|
319.97368
hPa
|
250
torr
|
333.30592
hPa
|
260
torr
|
346.63816
hPa
|
270
torr
|
359.97039
hPa
|
280
torr
|
373.30263
hPa
|
290
torr
|
386.63487
hPa
|
300
torr
|
399.96711
hPa
|
310
torr
|
413.29934
hPa
|
320
torr
|
426.63158
hPa
|
330
torr
|
439.96382
hPa
|
340
torr
|
453.29605
hPa
|
350
torr
|
466.62829
hPa
|
360
torr
|
479.96053
hPa
|
370
torr
|
493.29276
hPa
|
380
torr
|
506.625
hPa
|
390
torr
|
519.95724
hPa
|
400
torr
|
533.28947
hPa
|
410
torr
|
546.62171
hPa
|
420
torr
|
559.95395
hPa
|
430
torr
|
573.28618
hPa
|
440
torr
|
586.61842
hPa
|
450
torr
|
599.95066
hPa
|
460
torr
|
613.28289
hPa
|
470
torr
|
626.61513
hPa
|
480
torr
|
639.94737
hPa
|
490
torr
|
653.27961
hPa
|
500
torr
|
666.61184
hPa
|
510
torr
|
679.94408
hPa
|
520
torr
|
693.27632
hPa
|
530
torr
|
706.60855
hPa
|
540
torr
|
719.94079
hPa
|
550
torr
|
733.27303
hPa
|
560
torr
|
746.60526
hPa
|
570
torr
|
759.9375
hPa
|
580
torr
|
773.26974
hPa
|
590
torr
|
786.60197
hPa
|
600
torr
|
799.93421
hPa
|
610
torr
|
813.26645
hPa
|
620
torr
|
826.59868
hPa
|
630
torr
|
839.93092
hPa
|
640
torr
|
853.26316
hPa
|
650
torr
|
866.59539
hPa
|
660
torr
|
879.92763
hPa
|
670
torr
|
893.25987
hPa
|
680
torr
|
906.59211
hPa
|
690
torr
|
919.92434
hPa
|
700
torr
|
933.25658
hPa
|
710
torr
|
946.58882
hPa
|
720
torr
|
959.92105
hPa
|
730
torr
|
973.25329
hPa
|
740
torr
|
986.58553
hPa
|
750
torr
|
999.91776
hPa
|
760
torr
|
1013.25
hPa
|
770
torr
|
1026.58224
hPa
|
780
torr
|
1039.91447
hPa
|
790
torr
|
1053.24671
hPa
|
800
torr
|
1066.57895
hPa
|
810
torr
|
1079.91118
hPa
|
820
torr
|
1093.24342
hPa
|
830
torr
|
1106.57566
hPa
|
840
torr
|
1119.90789
hPa
|
850
torr
|
1133.24013
hPa
|
860
torr
|
1146.57237
hPa
|
870
torr
|
1159.90461
hPa
|
880
torr
|
1173.23684
hPa
|
890
torr
|
1186.56908
hPa
|
900
torr
|
1199.90132
hPa
|
910
torr
|
1213.23355
hPa
|
920
torr
|
1226.56579
hPa
|
930
torr
|
1239.89803
hPa
|
940
torr
|
1253.23026
hPa
|
950
torr
|
1266.5625
hPa
|
960
torr
|
1279.89474
hPa
|
970
torr
|
1293.22697
hPa
|
980
torr
|
1306.55921
hPa
|
990
torr
|
1319.89145
hPa
|
1000
torr
|
1333.22368
hPa
|
If you like the website, share it on social media.