atm → mmHg

Enter pressure in atmospheres

atm

↓

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Formula: mmHg = atm × 760 • 1 atm = 760 mmHg exactly

mmHg → atm

Enter pressure in mmHg

mmHg

↓

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Formula: atm = mmHg ÷ 760 • 760 mmHg = 1 atm exactly

ATM to mmHg Conversion Chart

atm	mmHg (Torr)	kPa	psi	Real-World Reference
0 atm	0.000 mmHg	0 kPa	0 psi	Perfect vacuum
0.001 atm	0.760 mmHg	0.101 kPa	0.0145 psi	Near-vacuum (outer space edge)
0.006 atm	4.560 mmHg	0.608 kPa	0.0882 psi	Mars surface pressure
0.1 atm	76.00 mmHg	10.13 kPa	1.47 psi	Very low / high altitude (~16 km)
0.2 atm	152 mmHg	20.27 kPa	2.94 psi	Stratosphere lower boundary
0.25 atm	190 mmHg	25.33 kPa	3.67 psi	Normal diastolic blood pressure (approx.)
0.158 atm	120 mmHg	15.99 kPa	2.32 psi	Systolic blood pressure — normal (120 mmHg)
0.5 atm	380 mmHg	50.66 kPa	7.35 psi	Half an atmosphere (~5,500 m altitude)
0.75 atm	570 mmHg	75.99 kPa	11.02 psi	Approximate pressure at ~2,500 m altitude
1 atm	760 mmHg	101.325 kPa	14.696 psi	Standard atmosphere (sea level)
1.5 atm	1,140 mmHg	151.99 kPa	22.05 psi	Scuba diving — ~5 m depth
2 atm	1,520 mmHg	202.65 kPa	29.39 psi	Scuba diving — ~10 m depth
2.5 atm	1,900 mmHg	253.31 kPa	36.74 psi	Car tyre pressure (approx.)
3 atm	2,280 mmHg	303.975 kPa	44.09 psi	Scuba diving — ~20 m depth
4 atm	3,040 mmHg	405.3 kPa	58.78 psi	Pressure cooker (typical)
5 atm	3,800 mmHg	506.625 kPa	73.48 psi	Deep sea ~40 m / industrial gas
10 atm	7,600 mmHg	1013.25 kPa	146.96 psi	Deep sea ~90 m
100 atm	76,000 mmHg	10132.5 kPa	1469.6 psi	Scientific high-pressure experiments

Common mmHg Values in Everyday Life

mmHg (Torr)	atm	kPa	Context	Category
0 mmHg	0 atm	0 kPa	Absolute vacuum	Science
60 mmHg	0.0789 atm	7.999 kPa	Critically low blood pressure	Medicine
80 mmHg	0.1053 atm	10.666 kPa	Diastolic — low normal	Medicine
120 mmHg	0.1579 atm	15.999 kPa	Systolic — normal (optimal)	Medicine
130 mmHg	0.1711 atm	17.332 kPa	Systolic — elevated	Medicine
140 mmHg	0.1842 atm	18.665 kPa	Systolic — Stage 1 hypertension	Medicine
160 mmHg	0.2105 atm	21.331 kPa	Systolic — Stage 2 hypertension	Medicine
380 mmHg	0.5000 atm	50.663 kPa	Half standard atmosphere	Science
525 mmHg	0.6908 atm	69.993 kPa	Storm pressure (low barometric)	Weather
740 mmHg	0.9737 atm	98.658 kPa	Low barometric — stormy weather	Weather
760 mmHg	1.0000 atm	101.325 kPa	Standard atmosphere (sea level)	Reference
770 mmHg	1.0132 atm	102.659 kPa	High pressure — fair/sunny weather	Weather
780 mmHg	1.0263 atm	103.992 kPa	Very high barometric pressure	Weather
1520 mmHg	2.0000 atm	202.65 kPa	2 atm — 10 m below sea level	Diving
2280 mmHg	3.0000 atm	303.975 kPa	3 atm — 20 m below sea level	Diving
3800 mmHg	5.0000 atm	506.625 kPa	5 atm — 40 m below sea level	Diving

ⓘ 1 atm = 760 mmHg (exact, by definition) = 101.325 kPa = 101,325 Pa = 1.01325 bar = 14.696 psi. • mmHg is also called torr (1 mmHg = 1 torr exactly). • Standard atmosphere (1 atm) is defined as the average air pressure at sea level at 45° latitude. • In medicine, blood pressure is always expressed in mmHg.

ATM to mmHg Pressure Conversion Calculator & Chart

ATM to mmHg Conversion Chart

Common mmHg Values in Everyday Life