Universal Pressure Converter – Any Pair of Units

Instantly convert pressure units with this online calculator. Supports Pascals (Pa), kPa, MPa, Bars, Millibars (mbar), Atmospheres (atm), Pounds per Square Inch (psi) and any other pressure unit you can think of. Yes, that one too!

How to Use

• Select the input unit from the dropdown list.
• Enter the pressure value in the input field.
• Choose the desired output unit.
• The converted value updates automatically.
• Adjust decimal places for precision if needed.
• Click “Clear All” to reset the tool.

Table of Conversions

Definitions of Measurement Units

Pascals (Pa)

The Pascal (Pa) is the SI (International System of Units) base unit of pressure, defined as one newton per square meter (N/m²). It is commonly used in physics, engineering, and meteorology.

Kilopascals (kPa)

The Kilopascal (kPa) is a unit of pressure in the SI system, equal to 1,000 Pascals (1 kPa = 1,000 Pa). It is frequently used in engineering applications, weather forecasting, and material testing.

Megapascals (MPa)

The Megapascal (MPa) is a high-pressure unit in the SI system, equal to 1,000,000 Pascals (1 MPa = 1,000,000 Pa). It is commonly used in structural engineering, hydraulics, and material strength testing.

Bar

The Bar is a non-SI metric unit of pressure, equal to 100,000 Pascals (1 bar = 100,000 Pa). It is widely used in meteorology, oceanography, and industrial applications, particularly for measuring atmospheric pressure and compressed air.

Millibar (mbar)

The Millibar (mbar) is a metric unit of pressure, equal to 100 Pascals (1 mbar = 100 Pa). It is commonly used in weather reports to describe atmospheric pressure.

Atmospheres (atm)

The Standard Atmosphere (atm) is a unit of pressure defined as 101,325 Pascals (1 atm = 101,325 Pa). It represents the average atmospheric pressure at sea level and is used in aviation, meteorology, and chemistry.

Pounds per Square Inch (psi)

The Pound per Square Inch (psi) is an imperial and US customary unit of pressure, equal to 6,894.76 Pascals (1 psi = 6,894.76 Pa). It is widely used in tire pressure measurement, hydraulic systems, and gas distribution.

Pounds per Square Foot (psf)

The Pound per Square Foot (psf) is another imperial pressure unit, equal to 47.88 Pascals (1 psf = 47.88 Pa). It is commonly used in construction and engineering to express building loads and material stress.

Inches of Mercury (inHg)

The Inch of Mercury (inHg) is a pressure unit traditionally used in meteorology and aviation. It is defined as 3,386.39 Pascals (1 inHg = 3,386.39 Pa). This unit originates from mercury barometers.

Millimeters of Mercury (mmHg)

The Millimeter of Mercury (mmHg), also known as Torr, is commonly used in medicine for measuring blood pressure. It is equal to 133.322 Pascals (1 mmHg = 133.322 Pa).

Torr

The Torr is a unit of pressure equivalent to 133.322 Pascals (1 Torr = 133.322 Pa). It is used primarily in vacuum physics and low-pressure measurements.

Technical Atmosphere (at)

The Technical Atmosphere (at) is a non-SI unit, equal to 98,066.5 Pascals (1 at = 98,066.5 Pa). It was historically used in engineering and steam engine calculations.

Kilogram-force per Square Centimeter (kgf/cm²)

The Kilogram-force per Square Centimeter (kgf/cm²) is a unit based on gravitational force, equal to 98,066.5 Pascals (1 kgf/cm² = 98,066.5 Pa). It is used in hydraulics and high-pressure system measurements.

Kilogram-force per Square Meter (kgf/m²)

The Kilogram-force per Square Meter (kgf/m²) is a unit used for very low-pressure measurements, equal to 9.80665 Pascals (1 kgf/m² = 9.80665 Pa). It is rarely used today.

Dyne per Square Centimeter (dyne/cm²)

The Dyne per Square Centimeter (dyne/cm²) is a CGS (centimeter-gram-second) unit of pressure, equal to 0.1 Pascals (1 dyne/cm² = 0.1 Pa). It is used in fluid dynamics and surface tension studies.

Newton per Square Millimeter (N/mm²)

The Newton per Square Millimeter (N/mm²) is an SI unit equal to 1,000,000 Pascals (1 N/mm² = 1 MPa = 1,000,000 Pa). It is commonly used in material science to measure stress and tensile strength.

Newton per Square Centimeter (N/cm²)

The Newton per Square Centimeter (N/cm²) is another SI unit, equal to 10,000 Pascals (1 N/cm² = 10,000 Pa). It is used in industrial applications and mechanical calculations.

Millimeters of Water (mmH₂O)

The Millimeter of Water (mmH₂O) is a pressure unit equal to 9.80665 Pascals (1 mmH₂O = 9.80665 Pa). It is used in HVAC, medical equipment, and low-pressure differential measurements.

Centimeters of Water (cmH₂O)

The Centimeter of Water (cmH₂O) is equal to 98.0665 Pascals (1 cmH₂O = 98.0665 Pa). It is widely used in pulmonary medicine and respiratory ventilators.

Inches of Water (inH₂O)

The Inch of Water (inH₂O) is a unit of pressure equal to 249.082 Pascals (1 inH₂O = 249.082 Pa). It is used in ventilation, water column pressure, and filter efficiency testing.

Feet of Water (ftH₂O)

The Foot of Water (ftH₂O) is equal to 2,988.98 Pascals (1 ftH₂O = 2,988.98 Pa). It is used in plumbing, hydrostatic pressure measurements, and water depth calculations.

Kilonewton per Square Meter (kN/m²)

The Kilonewton per Square Meter (kN/m²) is an SI unit equal to 1,000 Pascals (1 kN/m² = 1,000 Pa). It is used in structural engineering and geotechnical applications.

Microns of Mercury (μmHg)

The Micron of Mercury (μmHg) is a small pressure unit equal to 0.133322 Pascals (1 μmHg = 0.133322 Pa). It is used in ultra-low vacuum measurements.

Millitorr (mTorr)

The Millitorr (mTorr) is another vacuum measurement unit, equal to 0.133322 Pascals (1 mTorr = 0.133322 Pa). It is used in research and industrial vacuum systems.

Barye

The Barye (Ba) is a CGS unit of pressure, equal to 0.1 Pascals (1 Ba = 0.1 Pa). It was used in early scientific studies but is now largely obsolete.

Megapascal Absolute (MPa abs)

The Megapascal Absolute (MPa abs) is equal to 1,000,000 Pascals (1 MPa abs = 1,000,000 Pa), measuring pressure relative to a perfect vacuum.

Megapascal Gauge (MPa gauge)

The Megapascal Gauge (MPa gauge) is equal to 1,000,000 Pascals (1 MPa gauge = 1,000,000 Pa), measuring pressure relative to atmospheric pressure.

Kilopascal Absolute (kPa abs)

The Kilopascal Absolute (kPa abs) is equal to 1,000 Pascals (1 kPa abs = 1,000 Pa), measuring pressure relative to a vacuum.

Kilopascal Gauge (kPa gauge)

The Kilopascal Gauge (kPa gauge) is equal to 1,000 Pascals (1 kPa gauge = 1,000 Pa), measuring pressure above atmospheric pressure.

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