psi to mmHg Pressure Converter

Convert between psi, mmHg, kPa, bar, atm, torr and pascals. Every result also shows the same pressure in all seven units.

Runs in your browserFree, no sign-upLast reviewed October 8, 2026

Result

14.503774 psi

Conversion details

Input: 1 bar; Bar
Formula: 1 bar = 14.503774 psi
Rounded: 14.5 psi

Same value in every unit

Unit	Value
Pascal (Pa)	100000 Pa
Kilopascal (kPa)	100 kPa
Bar	1 bar
Pound per square inch (psi)	14.503774 psi
Standard atmosphere (atm)	0.986923 atm
Torr	750.061683 Torr
Millimetre of mercury (mmHg)	750.061576 mmHg

Quick answers

How many mmHg are in 1 psi?: 1 psi is 51.7149 mmHg. Multiply a psi figure by 51.7149 to get millimetres of mercury, so 3 psi is 155.14 mmHg and 14 psi is 724.01 mmHg.
How do I convert mmHg to psi?: Multiply by 0.019337, or divide by 51.7149. 120 mmHg is 2.3204 psi, 760 mmHg is 14.696 psi and 1,000 mmHg is 19.3368 psi.
How do I convert mmHg to kPa?: Multiply by 0.133322, or divide by 7.5006. 1 mmHg is 0.133322 kPa, 20 mmHg is 2.666 kPa, 750 mmHg is 99.992 kPa and 760 mmHg is 101.325 kPa.
What is 120 mmHg in psi?: 120 mmHg is 2.3204 psi. It is also 15.999 kPa and 0.16 bar. A blood pressure reading of 120/80 mmHg is about 2.32/1.55 psi, or 16.0/10.7 kPa.
How many mmHg are in 1 bar?: 1 bar is 750.0616 mmHg, and 1 mmHg is 0.001333 bar. One bar is exactly 100 kPa, which is slightly less than one standard atmosphere of 760 mmHg.
What is 2000 psi in atm?: 2,000 psi is 136.0919 standard atmospheres. One psi is 0.068046 atm, and one atmosphere is 14.6959 psi.

Why use Pressure Converter

One psi is 51.7149 mmHg, and one mmHg is 0.019337 psi. To convert, set From to pound per square inch and To to millimetre of mercury, then type the reading: 14 psi comes out as 724.008953 mmHg. The same three fields handle any pair among pascals, kilopascals, bar, psi, standard atmospheres, torr and mmHg, so mmHg to kPa (1 mmHg = 0.133322 kPa) and mmHg to bar work the same way. Below the result, a table lists your pressure in all seven units at once, which saves running the conversion again for each one.

psi to mmHg conversion chart

Common gauge figures from a few psi up to 100 psi, with kilopascals and bar alongside. Values are from the converter, rounded.

psi	mmHg	kPa	bar
1	51.71	6.895	0.0689
3	155.14	20.68	0.2068
5	258.57	34.47	0.3447
10	517.15	68.95	0.6895
14	724.01	96.53	0.9653
14.7	760.21	101.35	1.0135
15	775.72	103.42	1.0342
20	1,034.30	137.90	1.3790
30	1,551.45	206.84	2.0684
32	1,654.88	220.63	2.2063
35	1,810.02	241.32	2.4132
50	2,585.75	344.74	3.4474
60	3,102.90	413.69	4.1369
100	5,171.49	689.48	6.8948

14.7 psi is the usual rounded figure for one atmosphere. The exact value is 14.6959 psi, which is 760 mmHg.

mmHg to psi, kPa and bar chart

The range that covers blood pressure cuffs, vacuum gauges and barometer readings.

mmHg	psi	kPa	bar
1	0.0193	0.133	0.0013
20	0.3867	2.666	0.0267
40	0.7735	5.333	0.0533
60	1.1602	7.999	0.0800
80	1.5469	10.666	0.1067
100	1.9337	13.332	0.1333
120	2.3204	15.999	0.1600
140	2.7071	18.665	0.1867
160	3.0939	21.332	0.2133
200	3.8674	26.664	0.2666
300	5.8010	39.997	0.4000
500	9.6684	66.661	0.6666
750	14.5026	99.992	0.9999
760	14.6960	101.325	1.0133
1,000	19.3368	133.322	1.3332

Formula for psi, mmHg and kPa

mmHg = psi × 51.7149 psi = mmHg × 0.019337 kPa = mmHg × 0.133322 mmHg = kPa × 7.5006 bar = mmHg × 0.001333

The converter turns the input into pascals, then divides by the pascal value of the target unit. It uses 1 psi = 6,894.757293168361 Pa and 1 mmHg = 133.322387415 Pa, so 1 psi ÷ 1 mmHg = 51.714925. Worked through for 50 psi: 50 × 6,894.757 = 344,737.86 Pa, and 344,737.86 ÷ 133.322387 = 2,585.746 mmHg. The exact factor for your chosen pair is shown as Formula under Conversion details.

Blood pressure readings in kPa and psi

Blood pressure is written as systolic over diastolic in mmHg. These are the same readings expressed in kilopascals and psi; convert each number separately.

Reading in mmHg	In kPa	In psi
90/60	12.0/8.0	1.74/1.16
120/80	16.0/10.7	2.32/1.55
140/90	18.7/12.0	2.71/1.74
160/100	21.3/13.3	3.09/1.93
180/120	24.0/16.0	3.48/2.32

This table only changes units. It is not a guide to what a reading means for your health.

What one of each pressure unit equals

Each row is one unit expressed in the four units people convert between most.

1 unit of	kPa	psi	mmHg	bar
Kilopascal (kPa)	1	0.145038	7.500616	0.01
Bar	100	14.503774	750.061576	1
Pound per square inch (psi)	6.894757	1	51.714925	0.068948
Standard atmosphere (atm)	101.325	14.695949	759.999892	1.01325
Torr	0.133322	0.019337	1	0.001333
Millimetre of mercury (mmHg)	0.133322	0.019337	1	0.001333

One kilopascal is exactly 1,000 pascals. Torr and mmHg agree to six decimal places at this scale.

Gauge or absolute: check before you convert

A unit conversion does not change what the pressure is measured against. Tyre gauges, compressor gauges and blood pressure cuffs read gauge pressure, meaning pressure above the surrounding air. Barometers and vacuum specifications usually give absolute pressure, measured from a perfect vacuum.

The two differ by one atmosphere, about 14.7 psi or 760 mmHg at sea level. A tyre at 32 psi on the gauge holds roughly 46.7 psi absolute. This converter changes units only, so 32 psi in gives 1,654.88 mmHg out whichever kind it was. If you need absolute pressure for a gas law calculation, add atmospheric pressure in the same unit after converting.

Using Pressure Converter

1
Type the pressure reading into Value.
2
Set From to the unit you have, for example Pound per square inch (psi).
3
Set To to the unit you need, for example Millimetre of mercury (mmHg).
4
Read Result for the answer to six decimal places, and Rounded under Conversion details for two decimal places.
5
Check the Same value in every unit table for the reading in Pa, kPa, bar, psi, atm, Torr and mmHg together.

Questions people ask

Are torr and mmHg the same?

For practical purposes, yes. A torr is defined as exactly 1/760 of a standard atmosphere, and a millimetre of mercury as 133.322387415 Pa. In this converter 760 mmHg shows as 760.000108 Torr, a difference of about one part in seven million.

What is standard atmospheric pressure in each unit?

One standard atmosphere is defined as 101,325 Pa. That is 101.325 kPa, 1.01325 bar, 14.6959 psi, 760 Torr and, to the precision most people need, 760 mmHg.

How many psi are in one bar?

One bar is 14.5038 psi. A tyre pressure of 2.2 bar is 31.91 psi, 2.5 bar is 36.26 psi and 3 bar is 43.51 psi. In kilopascals, 2.2 bar is exactly 220 kPa.

Can it convert inches of mercury, millibar or hectopascals?

Not directly. The unit list is pascal, kilopascal, bar, psi, standard atmosphere, torr and mmHg. For hectopascals or millibars, which are the same size, divide by 10 and enter the figure as kilopascals: 1013.25 hPa is 101.325 kPa. For inches of mercury, multiply by 25.4 and enter it as mmHg.

How precise are the results?

Result is shown to six decimal places with trailing zeros removed, and Rounded gives two decimal places. Very small values can round to zero in the Rounded figure: 1 mmHg shows as 0.001333 bar in Result but 0 bar in Rounded, so use Result for small numbers.

Why is 760 mmHg not exactly 14.7 psi?

14.7 is a rounding. 760 mmHg is 14.695951 psi, and 14.7 psi works out to 760.21 mmHg. The gap is under 0.03 percent, which is smaller than the error of most gauges.

Does the converter accept negative pressures?

Yes. A negative Value is converted with the same factor, which suits vacuum readings written as negative gauge pressure. For example, -5 psi gauge is -258.57 mmHg gauge.