Unit converter

Pressure converter

Convert pascals, bar, atmospheres, psi, torr, and mercury column units.

Enter a value and choose units. Results update instantly.

1 psi = 0.0689475729 bar

All Pressure units

From 1 psi
UnitValue
Pascal Pa 6,894.757293168
Kilopascal kPa 6.8947572932
Megapascal MPa 0.0068947573
Bar bar 0.0689475729
Millibar mbar 68.9475729317
Standard atmosphere atm 0.0680459639
Pound per square inch psi 1
Torr Torr 51.7149325715
Millimeter of mercury mmHg 51.7149252039
Inch of mercury inHg 2.0360204611
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Common tasks

Pound per square inch to Barpsi to bar Bar to Pound per square inchbar to psi Kilopascal to Pound per square inchkPa to psi Standard atmosphere to Pascalatm to Pa Millibar to Kilopascalmbar to kPa Torr to PascalTorr to Pa

Reference

How pressure conversion works

Pressure is force per unit area. The pascal is the SI reference; atmosphere and conventional mercury units use internationally specified standard values.

Values are converted to pascal first, then from that reference into the requested unit. Keeping a single documented reference reduces inconsistent pair-by-pair constants.

Accuracy note: Conventional mercury-column units are not measurements adjusted for local temperature or gravity.

Unit reference

UnitSymbol1 unit in Pa
PascalPa1
KilopascalkPa1,000
MegapascalMPa1,000,000
Barbar100,000
Millibarmbar100
Standard atmosphereatm101,325
Pound per square inchpsi6,894.757293168
TorrTorr133.322368421053
Millimeter of mercurymmHg133.322387415
Inch of mercuryinHg3,386.389

Long-tail directory

Every indexed conversion

Choose a source unit to see all available destinations.

From Pascal (Pa)
Pascal to KilopascalPascal to MegapascalPascal to BarPascal to MillibarPascal to Standard atmospherePascal to Pound per square inchPascal to Torr
From Kilopascal (kPa)
Kilopascal to PascalKilopascal to MegapascalKilopascal to BarKilopascal to MillibarKilopascal to Standard atmosphereKilopascal to Pound per square inchKilopascal to Torr
From Megapascal (MPa)
Megapascal to PascalMegapascal to KilopascalMegapascal to BarMegapascal to MillibarMegapascal to Standard atmosphereMegapascal to Pound per square inchMegapascal to Torr
From Bar (bar)
Bar to PascalBar to KilopascalBar to MegapascalBar to MillibarBar to Standard atmosphereBar to Pound per square inchBar to Torr
From Millibar (mbar)
Millibar to PascalMillibar to KilopascalMillibar to MegapascalMillibar to BarMillibar to Standard atmosphereMillibar to Pound per square inchMillibar to Torr
From Standard atmosphere (atm)
Standard atmosphere to PascalStandard atmosphere to KilopascalStandard atmosphere to MegapascalStandard atmosphere to BarStandard atmosphere to MillibarStandard atmosphere to Pound per square inchStandard atmosphere to Torr
From Pound per square inch (psi)
Pound per square inch to PascalPound per square inch to KilopascalPound per square inch to MegapascalPound per square inch to BarPound per square inch to MillibarPound per square inch to Standard atmospherePound per square inch to Torr
From Torr (Torr)
Torr to PascalTorr to KilopascalTorr to MegapascalTorr to BarTorr to MillibarTorr to Standard atmosphereTorr to Pound per square inch

Primary source

Definitions and standards

Conversion constants and definitions for this category are checked against NIST SP 811: Pressure units.

See Methods & sources for rounding rules, exact-value handling, and review policy.

Questions

Pressure FAQ

What is the reference unit for pressure conversions?

ConvertWin uses pascal (Pa) as the internal reference for this category, then converts to the selected output unit.

How accurate is this pressure converter?

Conventional mercury-column units are not measurements adjusted for local temperature or gravity.