The millimeter of mercury (mmHg) is a unit of pressure traditionally used in medicine and meteorology, and its history dates back to the barometer invention by Evangelista Torricelli in 1643. Often, it is associated with measuring blood pressure and intraocular pressure, representing the pressure exerted by a column of mercury precisely 1 millimeter high. This fascinating unit highlights the interplay of physics and medicine, reflecting both the force of blood circulating against vessel walls and the atmospheric pressure’s effects on our weather systems.

Interestingly, mmHg is one of the few units still officially sanctioned for use with SI (International System of Units) under specific legal and medical contexts, underscoring its importance over centuries. Despite the global shift towards using Pascals for pressure, mmHg remains ingrained in clinical settings because of its historical usage and direct relation to human physiology. Its origins and continued use illustrate how historical scientific instruments still influence modern practices.

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The kilopascal (kPa) is a metric unit of pressure that often finds its application in various everyday and scientific contexts, such as meteorology, engineering, and automotive industries. One intriguing aspect of the kilopascal is its relationship to atmospheric pressure. At sea level, the standard atmospheric pressure is 101.3 kPa. This means when the weather forecast mentions a high or low-pressure system, it’s essentially describing variations in kilopascals, subtly influencing everything from weather patterns to flight dynamics.

In the world of construction and engineering, knowing a material’s tolerance in kilopascals is crucial for ensuring structural integrity and safety. For instance, the force exerted by an average car tire on the ground is about 220 kPa, showcasing kilopascals as a pivotal unit in designing components that need to withstand specific pressures. Such applications highlight its crucial role in both routine and critical decision-making processes.

Millimeters of mercury

Kilopascals

0 mmHg

0 kPa

10 mmHg

1.33322 kPa

20 mmHg

2.66644 kPa

30 mmHg

4 kPa

40 mmHg

5.33288 kPa

50 mmHg

6.6661 kPa

60 mmHg

8 kPa

70 mmHg

9.33254 kPa

80 mmHg

10.66576 kPa

90 mmHg

11.99898 kPa

100 mmHg

13.3322 kPa

110 mmHg

14.66542 kPa

120 mmHg

15.99864 kPa

130 mmHg

17.33186 kPa

140 mmHg

18.66508 kPa

150 mmHg

19.9983 kPa

160 mmHg

21.33152 kPa

170 mmHg

22.66474 kPa

180 mmHg

23.99796 kPa

190 mmHg

25.33118 kPa

200 mmHg

26.6644 kPa

210 mmHg

27.99762 kPa

220 mmHg

29.33084 kPa

230 mmHg

30.66406 kPa

240 mmHg

31.99728 kPa

250 mmHg

33.3305 kPa

260 mmHg

34.66372 kPa

270 mmHg

35.99694 kPa

280 mmHg

37.33016 kPa

290 mmHg

38.66338 kPa

300 mmHg

39.9966 kPa

310 mmHg

41.32982 kPa

320 mmHg

42.66304 kPa

330 mmHg

43.99626 kPa

340 mmHg

45.32948 kPa

350 mmHg

46.6627 kPa

360 mmHg

47.99592 kPa

370 mmHg

49.32914 kPa

380 mmHg

50.66236 kPa

390 mmHg

51.99558 kPa

400 mmHg

53.3288 kPa

410 mmHg

54.66202 kPa

420 mmHg

55.99524 kPa

430 mmHg

57.32846 kPa

440 mmHg

58.66168 kPa

450 mmHg

59.9949 kPa

460 mmHg

61.32812 kPa

470 mmHg

62.66134 kPa

480 mmHg

63.99456 kPa

490 mmHg

65.32778 kPa

500 mmHg

66.661 kPa

510 mmHg

67.99422 kPa

520 mmHg

69.32744 kPa

530 mmHg

70.66066 kPa

540 mmHg

71.99388 kPa

550 mmHg

73.3271 kPa

560 mmHg

74.66032 kPa

570 mmHg

75.99354 kPa

580 mmHg

77.32676 kPa

590 mmHg

78.65998 kPa

600 mmHg

79.9932 kPa

610 mmHg

81.32642 kPa

620 mmHg

82.65964 kPa

630 mmHg

83.99286 kPa

640 mmHg

85.32608 kPa

650 mmHg

86.6593 kPa

660 mmHg

87.99252 kPa

670 mmHg

89.32574 kPa

680 mmHg

90.65896 kPa

690 mmHg

91.99218 kPa

700 mmHg

93.3254 kPa

710 mmHg

94.65862 kPa

720 mmHg

95.99184 kPa

730 mmHg

97.32506 kPa

740 mmHg

98.65828 kPa

750 mmHg

99.9915 kPa

760 mmHg

101.32472 kPa

770 mmHg

102.65794 kPa

780 mmHg

103.99116 kPa

790 mmHg

105.32438 kPa

800 mmHg

106.6576 kPa

810 mmHg

107.99082 kPa

820 mmHg

109.32404 kPa

830 mmHg

110.65726 kPa

840 mmHg

111.99048 kPa

850 mmHg

113.3237 kPa

860 mmHg

114.65692 kPa

870 mmHg

115.99014 kPa

880 mmHg

117.32336 kPa

890 mmHg

118.65658 kPa

900 mmHg

119.9898 kPa

910 mmHg

121.32302 kPa

920 mmHg

122.65624 kPa

930 mmHg

123.98946 kPa

940 mmHg

125.32268 kPa

950 mmHg

126.6559 kPa

960 mmHg

127.98912 kPa

970 mmHg

129.32234 kPa

980 mmHg

130.65556 kPa

990 mmHg

131.98878 kPa

1000 mmHg

133.322 kPa

Conversion

Millimeters of mercury to Pascals

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Millimeters of mercury to Megapascals

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Millimeters of mercury to Hectopascals

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Millimeters of mercury to Millibar

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Millimeters of mercury to Bar

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Millimeters of mercury to Torr

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Millimeters of mercury to Meters of water @ 4°C

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Millimeters of mercury to Pounds per square inch

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Millimeters of mercury to Kilopound per square inch

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Millimeters of mercury to Inches of mercury

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Millimeters of mercury to Kilopascals Conversion

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> Millimeters of mercury to Kilopascals Conversion Table

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:: Pressure Units

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> Millimeters of mercury to Kilopascals Conversion Table

> Other Conversions

:: Pressure Units

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