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Pressure Converter

Pressure Unit Conversion Chart

1 Pa = 0.00100000 kPa
Pascal (Pa) to Kilopascal (kPa)
1 Pa = 0.0000100000 bar
Pascal (Pa) to Bar (bar)
1 Pa = 0.00000986923 atm
Pascal (Pa) to Standard Atmosphere (atm)
1 Pa = 0.00750064 mmHg
Pascal (Pa) to Millimeters of Mercury (mmHg)
1 Pa = 0.000145038 psi
Pascal (Pa) to Pounds per Square Inch (psi)
1 Pa = 0.00750064 Torr
Pascal (Pa) to Torr (Torr)
1 Pa = 0.0100000 mbar
Pascal (Pa) to Millibar (mbar)
1 kPa = 1,000 Pa
Kilopascal (kPa) to Pascal (Pa)
1 kPa = 0.0100000 bar
Kilopascal (kPa) to Bar (bar)
1 kPa = 0.00986923 atm
Kilopascal (kPa) to Standard Atmosphere (atm)
1 kPa = 7.501 mmHg
Kilopascal (kPa) to Millimeters of Mercury (mmHg)
1 kPa = 0.145038 psi
Kilopascal (kPa) to Pounds per Square Inch (psi)
1 kPa = 7.501 Torr
Kilopascal (kPa) to Torr (Torr)
1 kPa = 10 mbar
Kilopascal (kPa) to Millibar (mbar)
1 bar = 100,000 Pa
Bar (bar) to Pascal (Pa)
1 bar = 100 kPa
Bar (bar) to Kilopascal (kPa)
1 bar = 0.986923 atm
Bar (bar) to Standard Atmosphere (atm)
1 bar = 750.064 mmHg
Bar (bar) to Millimeters of Mercury (mmHg)
1 bar = 14.504 psi
Bar (bar) to Pounds per Square Inch (psi)
1 bar = 750.064 Torr
Bar (bar) to Torr (Torr)
1 bar = 1,000 mbar
Bar (bar) to Millibar (mbar)
1 atm = 101,325 Pa
Standard Atmosphere (atm) to Pascal (Pa)
1 atm = 101.325 kPa
Standard Atmosphere (atm) to Kilopascal (kPa)
1 atm = 1.013 bar
Standard Atmosphere (atm) to Bar (bar)
1 atm = 760.002 mmHg
Standard Atmosphere (atm) to Millimeters of Mercury (mmHg)
1 atm = 14.696 psi
Standard Atmosphere (atm) to Pounds per Square Inch (psi)
1 atm = 760.002 Torr
Standard Atmosphere (atm) to Torr (Torr)
1 atm = 1,013.25 mbar
Standard Atmosphere (atm) to Millibar (mbar)
1 mmHg = 133.322 Pa
Millimeters of Mercury (mmHg) to Pascal (Pa)
1 mmHg = 0.133322 kPa
Millimeters of Mercury (mmHg) to Kilopascal (kPa)
1 mmHg = 0.00133322 bar
Millimeters of Mercury (mmHg) to Bar (bar)
1 mmHg = 0.00131579 atm
Millimeters of Mercury (mmHg) to Standard Atmosphere (atm)
1 mmHg = 0.0193367 psi
Millimeters of Mercury (mmHg) to Pounds per Square Inch (psi)
1 mmHg = 1 Torr
Millimeters of Mercury (mmHg) to Torr (Torr)
1 mmHg = 1.333 mbar
Millimeters of Mercury (mmHg) to Millibar (mbar)
1 psi = 6,894.76 Pa
Pounds per Square Inch (psi) to Pascal (Pa)
1 psi = 6.895 kPa
Pounds per Square Inch (psi) to Kilopascal (kPa)
1 psi = 0.0689476 bar
Pounds per Square Inch (psi) to Bar (bar)
1 psi = 0.0680460 atm
Pounds per Square Inch (psi) to Standard Atmosphere (atm)
1 psi = 51.715 mmHg
Pounds per Square Inch (psi) to Millimeters of Mercury (mmHg)
1 psi = 51.715 Torr
Pounds per Square Inch (psi) to Torr (Torr)
1 psi = 68.948 mbar
Pounds per Square Inch (psi) to Millibar (mbar)
1 Torr = 133.322 Pa
Torr (Torr) to Pascal (Pa)
1 Torr = 0.133322 kPa
Torr (Torr) to Kilopascal (kPa)
1 Torr = 0.00133322 bar
Torr (Torr) to Bar (bar)
1 Torr = 0.00131579 atm
Torr (Torr) to Standard Atmosphere (atm)
1 Torr = 1 mmHg
Torr (Torr) to Millimeters of Mercury (mmHg)
1 Torr = 0.0193367 psi
Torr (Torr) to Pounds per Square Inch (psi)
1 Torr = 1.333 mbar
Torr (Torr) to Millibar (mbar)
1 mbar = 100 Pa
Millibar (mbar) to Pascal (Pa)
1 mbar = 0.100000 kPa
Millibar (mbar) to Kilopascal (kPa)
1 mbar = 0.00100000 bar
Millibar (mbar) to Bar (bar)
1 mbar = 0.000986923 atm
Millibar (mbar) to Standard Atmosphere (atm)
1 mbar = 0.750064 mmHg
Millibar (mbar) to Millimeters of Mercury (mmHg)
1 mbar = 0.0145038 psi
Millibar (mbar) to Pounds per Square Inch (psi)
1 mbar = 0.750064 Torr
Millibar (mbar) to Torr (Torr)

Pressure conversion calculator supports multiple pressure units including pascals, bar, psi, atmospheres, and more. Convert between basic pressure units, atmospheric units, imperial units, vacuum units, and specialized molecular dynamics pressure measurements with high precision.

Common pressure unit conversions: pascals to bar (Pa to bar), kilopascals to psi (kPa to psi), atmospheres to pascals (atm to Pa), millimeters mercury to pascals (mmHg to Pa), bar to pascals (bar to Pa), psi to pascals (psi to Pa), torr to pascals (Torr to Pa). Convert pressure units easily with precise calculations.

Popular Unit Conversions

Direct links to common conversion pages with formulas, tables, and FAQ.

psi to kPaPounds per Square Inch (psi) to Kilopascal (kPa)kPa to psiKilopascal (kPa) to Pounds per Square Inch (psi)psi to barPounds per Square Inch (psi) to Bar (bar)bar to psiBar (bar) to Pounds per Square Inch (psi)psi to MPaPounds per Square Inch (psi) to Megapascal (MPa)MPa to psiMegapascal (MPa) to Pounds per Square Inch (psi)atm to PaStandard Atmosphere (atm) to Pascal (Pa)Pa to atmPascal (Pa) to Standard Atmosphere (atm)mmHg to PaMillimeters of Mercury (mmHg) to Pascal (Pa)Pa to mmHgPascal (Pa) to Millimeters of Mercury (mmHg)Torr to PaTorr (Torr) to Pascal (Pa)Pa to TorrPascal (Pa) to Torr (Torr)

Principles & formula sources

Pressure in SI is pascal (Pa) = N/m². Practical units (bar, atm, torr, psi) are defined by exact factors or conventional reference values relative to Pa.

We convert via Pa: target = source × (source→Pa) ÷ (target→Pa).

Formula & example

Formula: value_target = value_source * (source_to_Pa) / (target_to_Pa).

Example: 1 atm = 101325 Pa; 1 bar = 100000 Pa.

Common errors & notes

  • Gauge vs absolute: psig vs psia differ by atmospheric pressure.
  • atm and bar are close but not equal—don’t treat them as interchangeable.
  • For vacuum/low pressure, use scientific notation and adequate precision.

Practical use cases

Pressure conversions are critical for tires, pumps, and vacuum systems where psi, bar, atm, and Pa are mixed.

Always confirm whether a value is gauge or absolute pressure before converting.

References / data sources

  • BIPM — SI Brochure (Pa)
  • NIST SP 811 — Guide for the Use of SI
  • ISO 80000 — Pressure conventions