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Pressure Unit Converter: bar, PSI, MPa, kPa, Pa

Pressure Unit Converter for Industrial Applications

Use the CPP PREMA pressure unit converter to quickly convert values between bar, mbar, Pa, hPa, kPa, MPa, PSI, atm, mmHg, Torr and kg/cm². The tool is designed for engineers, maintenance teams, machine builders and specialists working with pneumatic systems, hydraulic power units and compressed air installations.

The converter is useful when comparing technical documentation, selecting pneumatic components, checking operating pressure ranges or converting values used in international catalogues and datasheets. It helps convert bar to PSI, PSI to bar, MPa to bar, kPa to MPa, Pa to kPa and other commonly used pressure units.

The results are intended for quick engineering reference. When selecting components for industrial applications, always verify the final parameters against the product documentation, operating conditions, medium, temperature range and safety requirements of the system.

Pressure Unit Converter

Enter a value in any pressure unit and the calculator will automatically convert it to bar, mbar, Pa, hPa, kPa, MPa, PSI, atm, mmHg, Torr and kg/cm². You can use either a dot or a comma as the decimal separator.

Select a pressure unit and enter a value

On mobile devices, the input field opens a numeric keyboard. You can use either a dot or a comma as the decimal separator.

Operating instructions for the calculator ‘Pressure Unit Converter’

Description of the calculator

The ‘Pressure Units Converter’ calculator allows you to quickly convert pressure values between different units: bar, mbar, Pa (N/m²), kPa (kN/m²), PSI (lb/in²) and MPa. You can enter the values manually or change them using the scroll buttons and the calculator will automatically update the other fields.

How to use the calculator

  1. Select the Starting Unit:
    • Locate the field corresponding to the unit you want to start with (e.g., “Bar”, “PSI”).
  2. Enter a Value Manually:
    • Click on the chosen field (e.g., “Bar”).
    • Enter a value using a dot (e.g., “1.5”) or a comma (e.g., “1,5”) as the decimal separator.
    • After entering the value, press Enter or click outside the field – the calculator will automatically recalculate and update the values in the other fields.
    • Example: Enter “1,5” in the “Bar” field, and you’ll see:
      • mBar: “1500,000000”
      • Pa: “150000,000000”
      • kPa: “150,000000”
      • PSI: “21,755661”
      • MPa: “0,150000”
  3. Use the Scroll Buttons:
    • Next to each field are buttons “↑” (increase value) and “↓” (decrease value).
    • Click “↑” to increase the value in the selected field by a specific step, or “↓” to decrease it. The steps for each unit are:
      • Bar: ±0.1
      • mBar: ±1
      • Pa: ±100
      • kPa: ±10
      • PSI: ±0.1
      • MPa: ±0.01
    • Example: If “Bar” shows “1,5”, clicking “↑” will change it to “1,6”, and the other fields will update (e.g., mBar: “1600,000000”).
  4. Edit Other Fields:
    • You can move to any other field (e.g., “PSI”) and enter a new value (e.g., “14.5” or “14,5”).
    • The calculator will recalculate all other units based on the newly edited field.
    • Example: Enter “14,5” in “PSI”, and you’ll see:
      • Bar: “0,999816”
      • mBar: “999,815592”
      • Pa: “99981,559200”
      • kPa: “99,981559”
      • MPa: “0,099982”
  5. Clear the Fields:
    • If you enter an invalid value (e.g., letters), all fields will be cleared automatically.
    • To manually clear, remove the value from any field and press Enter.

Notes

  • The calculator preserves the decimal separator format (dot or comma) based on what you entered in the edited field.
  • Values are displayed with precision up to 6 decimal places.
  • Negative values are not allowed – if a result would be negative (e.g., after clicking “↓”), the calculator sets it to 0.

Conversion table for pressure units

Unit bar mbar Pa [N/m²] kPa [kN/m²] PSI [lb/in²] MPa
1 bar 1 1000 100000 100 14.5038 0.1
1 mbar 0.001 1 100 0.1 0.014504 0.0001 (10-4)
1 Pa [N/m²] 0.00001 0.01 1 0.001 0.000145038 0.000001 (10-6)
1 kPa [kN/m²] 0.01 10 1000 1 0.145038 0.001 (10-3)
1 PSI [lb/in²] 0.06895 68.9476 6894.76 6.89476 1 0.0069
1 MPa 10 10000 (104) 1000000 (106) 1000 (103) 145.04 1

Why Pressure Unit Conversion Matters in Pneumatics and Hydraulics

Pressure values are one of the key parameters in industrial automation, pneumatic drives, hydraulic power transmission and compressed air systems. Different markets and manufacturers use different units, so engineers often need to convert values between bar, PSI, MPa, kPa and other units before selecting components or comparing technical specifications.

In European pneumatic systems, operating pressure is commonly specified in bar. In many international catalogues, especially those prepared for global markets, PSI is also frequently used. Hydraulic systems often use MPa or bar, depending on the manufacturer, documentation standard and target market. For this reason, a reliable pressure converter helps reduce mistakes during product selection and technical communication.

CPP PREMA manufactures pneumatic, hydraulic and automation components for demanding industrial applications. This converter has been prepared as a practical engineering tool for customers, distributors and technical teams working with pressure values in different unit systems.

FAQ – Pressure Unit Converte

What is a pressure unit converter used for?

A pressure unit converter is used to convert pressure values between different units such as bar, PSI, kPa, MPa, Pa, atm, mmHg, Torr and kg/cm². It is useful in pneumatics, hydraulics, compressed air systems, machine design and maintenance work.

Which pressure unit is most commonly used in pneumatic systems?

In European pneumatic systems, pressure is most commonly expressed in bar. Many industrial compressed air systems operate around 6 bar, although the correct operating pressure always depends on the application and component specification.

Which pressure units are commonly used in hydraulic systems?

Hydraulic systems often use bar or MPa. Higher pressure ranges are typical in hydraulic power systems, so MPa is frequently used in technical documentation and engineering calculations.

Why do some catalogues use PSI instead of bar?

PSI is commonly used in the United States and in technical documentation prepared for international markets. When comparing components from different suppliers, it is often necessary to convert PSI to bar or bar to PSI.

Can this converter be used for component selection?

Yes, the converter can support preliminary technical calculations and comparison of pressure values. However, final component selection should always include flow rate, medium, temperature, duty cycle, safety factor, sealing material and full operating conditions.

Does the converter support both dot and comma decimal separators?

Yes. The calculator accepts both dot and comma decimal separators, making it convenient for users working with European and international number formats.