Pressure Converter

Convert pressure between psi, bar, pascals, kilopascals, atmospheres, mmHg, torr and other units used for tires, weather, medicine and engineering.

How to use the Pressure Converter

  1. Type the value you want to convert in the first box.
  2. Choose the unit you are converting from and the unit you want to convert to.
  3. Read the result instantly. Use the swap button to reverse the direction, or copy the result with one click.

Popular pressure conversions

ConversionResultFormula
Pounds per square inch to bar1 psi = 0.0689476 barbar = pounds per square inch × 0.068947573
Bar to pounds per square inch1 bar = 14.5038 psipounds per square inch = bar × 14.503774
Pounds per square inch to kilopascals1 psi = 6.89476 kPakilopascals = pounds per square inch × 6.8947573
Kilopascals to pounds per square inch1 kPa = 0.145038 psipounds per square inch = kilopascals × 0.14503774
Bar to kilopascals1 bar = 100 kPakilopascals = bar × 100
Kilopascals to bar1 kPa = 0.01 barbar = kilopascals ÷ 100
Atmospheres to pascals1 atm = 101,325 Papascals = atmospheres × 101,325
Pascals to atmospheres1 Pa = 0.00000986923 atmatmospheres = pascals ÷ 101,325
Millimeters of mercury to kilopascals1 mmHg = 0.133322 kPakilopascals = millimeters of mercury × 0.13332239
Kilopascals to millimeters of mercury1 kPa = 7.50062 mmHgmillimeters of mercury = kilopascals × 7.5006158
Pounds per square inch to atmospheres1 psi = 0.068046 atmatmospheres = pounds per square inch × 0.068045964
Atmospheres to pounds per square inch1 atm = 14.6959 psipounds per square inch = atmospheres × 14.695949
Megapascals to pounds per square inch1 MPa = 145.038 psipounds per square inch = megapascals × 145.03774
Pounds per square inch to megapascals1 psi = 0.00689476 MPamegapascals = pounds per square inch × 0.0068947573
Bar to atmospheres1 bar = 0.986923 atmatmospheres = bar × 0.98692327
Atmospheres to bar1 atm = 1.01325 barbar = atmospheres × 1.01325
Kilograms-force per square centimeter to pounds per square inch1 kgf/cm² = 14.2233 psipounds per square inch = kilograms-force per square centimeter × 14.223343
Pounds per square inch to kilograms-force per square centimeter1 psi = 0.070307 kgf/cm²kilograms-force per square centimeter = pounds per square inch × 0.070306958
Inches of mercury to hectopascals1 inHg = 33.8639 hPahectopascals = inches of mercury × 33.86389
Hectopascals to inches of mercury1 hPa = 0.02953 inHginches of mercury = hectopascals × 0.02952998
Kilopascals to megapascals1 kPa = 0.001 MPamegapascals = kilopascals ÷ 1,000
Megapascals to kilopascals1 MPa = 1,000 kPakilopascals = megapascals × 1,000
Bar to megapascals1 bar = 0.1 MPamegapascals = bar ÷ 10
Megapascals to bar1 MPa = 10 barbar = megapascals × 10
Torr to atmospheres1 Torr = 0.00131579 atmatmospheres = torr ÷ 760
Atmospheres to torr1 atm = 760 Torrtorr = atmospheres × 760

Supported pressure units

UnitSymbolEqual to
PascalPa1 Pa
HectopascalhPa100 Pa
KilopascalkPa1,000 Pa
MegapascalMPa1,000,000 Pa
Barbar100,000 Pa
Millibarmbar100 Pa
Pound per square inchpsi6,894.7573 Pa
Kilopound per square inchksi6,894,757.3 Pa
Pound per square footpsf47.880259 Pa
Standard atmosphereatm101,325 Pa
TorrTorr133.32237 Pa
Millimeter of mercurymmHg133.32239 Pa
Inch of mercuryinHg3,386.389 Pa
Kilogram-force per square centimeterkgf/cm²98,066.5 Pa
Millimeter of watermmH₂O9.80665 Pa
Inch of waterinH₂O249.08891 Pa

Where each pressure unit is used

  • psi and bar: tire pressure, compressors and hydraulics. 1 bar is about 14.5 psi.
  • hPa and mbar: weather reports. They are the same size; standard sea-level pressure is 1,013.25 hPa.
  • mmHg: blood pressure. 120 mmHg is about 16 kPa.
  • MPa and ksi: material strength in engineering.
  • atm: chemistry and diving. 1 atm is exactly 101,325 Pa.

The pascal is the SI unit: one newton of force on one square meter. It is a very small pressure, which is why kilopascals and megapascals are more common.

Frequently asked questions

How many psi are in 1 bar?

One bar is about 14.5038 psi. One psi is about 0.0689476 bar.

How do I convert psi to kPa?

Multiply psi by 6.89476. For example, 32 psi is about 220.6 kPa.

Are mmHg and torr the same?

For practical purposes, yes. They differ by less than one part in seven million.

What is standard atmospheric pressure?

One standard atmosphere is 101,325 Pa, which equals 1.01325 bar, 14.696 psi or 760 mmHg.

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