Convert pressure units with the pressure converter, look up a conversion using tables, identify a pressure unit and find a pressure conversion factor.

# Pressure Units

## ksi – Kilopounds per Square Inch Pressure Unit

The ksi pressure unit is derived from the psi pressure unit by multiplying it by 1,000, and the full name is kilopounds force per square inch.

## mPa – Millipascal Pressure Unit

Find conversions for the mPa (Millipascal) pressure unit.

## N/mm² – Newton per Square Millimetre Pressure Unit

Find conversions for the N/mm² (newtons per square millimetre) pressure unit.

## N/cm² – Newton per Square Centimetre Pressure Unit

Find conversions for the N/cm² (newtons per square centimetre) pressure unit.

## kg/mm² – Kilogram per Square Millimetre Pressure Unit

Find conversions for the kg/mm² (kilograms per square millimetre) pressure unit.

## 1MPa, 10bar, 4000inH2O, 150psi, 1000kPa range pressure gauge

We need a pressure gauge for measuring over the 10 bar range which will also display pressures in MPa, bar, inch H2O, psi kPa

## Pressure Units

There are many types of pressure units used depending on the country, industry and application.

## Barometric mbar/hPa, psi, inHg, mmHg/Torr Conversion Table

Look up a barometric conversion value for millibar (mbar, mb), hectopascal (hPa), pounds per square inch (psi), inches of mercury (inHg), millimetres of mercury (mmHg) or Torr pressure units.

## inH2O to mmH2O, mbar, psi and mmHg Conversion Table

Look up a low pressure in inches of water column to find the conversion value in millimetres of water, millibar, pounds per square inch or millimetres of mercury.

## mH2O to ftH2O, bar, psi and inHg Conversion Table

Look up a liquid level in metres of water column to find the conversion value in feet of water, bar, pounds per square inch or inches of mercury.

## psi to mbar, hPa, Bar, inHg, mH2O, inH2O and ftH2O Conversion Table

Look up a pressure in pounds per square inch (psi) to find the conversion value in mb, hPa, bar, inHg, mH2O, inH2O or ftH2O.

## bar to psi, inHg, mH2O and ftH2O Conversion Table

Look up a pressure for 1 to 1000 bar to find the conversion value in pounds per square inch, inches of mercury, metres of water column or feet of water column.

## bar Pressure Unit

The bar is a widely used metric unit of measurement for pressure and 1 bar equals precisely 100,000 pascals.

## cmH2O – Centimetres of Water Column at 4 deg C Pressure Unit

Centimeters of Water Column is a manometric unit used to relate a pressure reading to the height of fresh water at a temperature of 4 degC. 1 centimeter of water gauge equals 98.0665 pascals.

## cmHg – Centimetres of Mercury at 0 deg C Pressure Unit

Centimeters of Mercury is a small pressure unit which represents the pressure pushing down due to gravity of any volume of liquid mercury which is 1cm high. 1 centimeter of mercury at zero degrees Celsius equals 1333.22 pascals. The use of cmHg is not as common as mmHg, it is mainly used in applications for […]

## dyn/cm² – Dyne per Square Centimetre Pressure Unit

Dyne per Square Centimeter is one of the smallest pressure units and is derived from the CGS unit for force, 1 Dyne per Square Centimetre equals 0.1 pascals.

## ftH2O – Feet of Water Column at 4 deg C Pressure Unit

Foot of Water Column is an American and English low value pressure unit

## g/cm² – Grams per Square Centimetre Pressure Unit

Grams Force per Square Centimetre is a cgs system pressure unit which is now largely obsolete and officially superceded by the SI system of units.

## hPa – Hectopascal Pressure Unit

Hectopascal is a 100x multiple of the pascal which is the SI unit for pressure.

## inH2O – Inches of Water Column at 4 deg C Pressure Unit

Inches of water gauge or column is an english and american unit for measuring liquid level. 1 inch of water column at 4 degrees celsius equals 249.089 Pa.

## inHg – Inches of Mercury at 0 degrees C Pressure Unit

Inch of Mercury is a British and American unit of measure for pressure. 1 inch of mercury at 0 degrees Celsius (32 deg F) equals 3386.39 pascals. An inch of mercury at zero degrees Celsius is defined as the pressure exerted by a column of mercury with a density of 13,595.1 kg/m3 under the pull […]

## kg/cm² – Kilogram per Square Centimetre Pressure Unit

Kilogram Force per Square Centimeter is a pressure unit that has been largely superseded by the SI unit system of pascal units.

## kPa – Kilopascal Pressure Unit

The kilopascal is a x1000 multiple of the pascal unit which is the SI unit for pressure. 1 kilopascal equals 1,000 Pascals.

## MPa – Megapascal Pressure Unit

The megapascal is a x1000000 multiple of the pascal unit which is the SI unit for pressure. 1 megapascal equals 1,000,000 pascals.

## mH2O – Metres of Water Gauge at 4 deg C Pressure Unit

Meters of water gauge or column is a metric unit for measuring liquid level. 1 metre of water column at 4 degrees Celsius equals 9806.65 pascals.

## µHg – Micron of Mercury at 0 deg C Pressure Unit

Micron of Mercury is a very small pressure unit derived from the pressure that is generated by a 1 micrometer (1/1000mm) column of liquid mercury.

## mbar – Millibar Pressure Unit

Millibar is a metric unit of pressure mainly used in European countries and is derived directly from the bar pressure unit which equals 1,000 mbar.

## mmH2O – Millimetres of Water Column at 4 deg C Pressure Unit

Millimeters of Water Column is a low range metric pressure unit derived from the hydrostatic pressure of 1mm head of water at 4 degC.

## mmHg – Millimetres of Mercury at 0 deg C Pressure Unit

Millimeters of Mercury at a temperature of 0degC is a small metric pressure unit derived from the pressure generated by a 1mm tall column of mercury liquid.

## mTorr – Millitorr Pressure Unit

Millitorr is a very small pressure unit used for high vacuum measurements and is a 1/1000x multiple of the torr pressure unit.

## N/m2 – Newton per Square Metre Pressure Unit

Newtons/Square Meter is a unit that shows how the pascal unit is derived from other SI units. Pressure is defined as Force/Area and the SI unit for Force is newtons (N) and the SI unit for Area is Sq Meters (m²). 1 newton per square metre equals 1 pascal. The N/m² pressure unit is one […]

## oz/in² – Ounce per Square Inch Pressure Unit

Ounce or Ounce Force per Square Inch is a low pressure unit which is part of the British and American system of units.

## Pa – Pascal Pressure Unit

Pascal is the SI unit for pressure and is derived from other SI units using the following relationship: Pa = (kg.m/s²)/m² = kg/m.s² = N/m².

## psf – Pounds per Square Foot Pressure Unit

Pounds Force per Square Foot is a British (Imperial) and American pressure unit which is directly related to the psi pressure unit by a factor of 144.

## psi – Pounds per Square Inch Pressure Unit

Pounds or pound force per square inch (psi, lb/in², pfsi or lbf/in²) is a widely used British and American unit of measure for pressure.

## atm – Standard Atmosphere Pressure Unit

Standard Atmosphere is mainly used as a reference value for the average atmospheric pressure at sea level.

## at – Technical Atmosphere Pressure Unit

Technical Atmosphere is used to represent a pressure value in multiples of atmospheric pressure.

## tsf – Tons per Square Foot (USA, Short) Pressure Unit

Tons or Tons Force per Square Foot (USA, Short) is an American pressure unit comparable in magnitude to atmospheric pressure.

## tsi – Tons per Square Inch (USA, Short) Pressure Unit

Tons or Tons Force per Square Inch (USA, Short) is one of the largest pressure units and is used in the measurement of ultra high pressures. 1 ton per square inch (usa, short) equals 13,789,500 pascals. This is the American version of tons per square inch which uses the so called short ton that is […]

## Torr Pressure Unit

Torr is a pressure unit which is defined as 1 standard atmosphere divided by 760 (1 atm/760 or 101325 Pa/760).

## tsi – Tons per Square Inch (UK, Long) Pressure Unit

Tons or Tons Force per Square Inch (UK, Long) is a very large pressure unit used historically for measuring extremely high pressures.

## daPa – Dekapascal Pressure Unit

Find conversions for the daPa (dekapascal) pressure unit.

## Does the type of Engineering Units matter for Pressure Transmitters

When selecting a part number for a pressure transmitter you will need to choose a pressure range. Usually a manufacturer will designate pressure ranges in the most common unit used by it’s customers. For the USA the most common unit is psi and for Europe it is bar, but what if you are working with […]

## Altitude to Pressure Conversion Table

Convert altitude in feet or metres of height to a pressure reading in millibar, pounds per square inch, millimetres of mercury or inches of mercury.

## Tyre Pressure Conversion Table

Convert tyre air pressure from pounds force per square inch (psi) to bar & kilopascal (kPa) units, and vice versa for car, bicycle, lorry, truck or an aircraft pneumatic tyre.