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Pressure Converter.

Convert pressure between pascals, kilopascals, megapascals, bar, atmospheres, and psi.

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Result: 0.001

Result

0.00000000

Pressure values use standard atmosphere (101,325 Pa) and exact SI-to-psi factors.

Use Cases

Engineering and Design

Convert pressure readings for mechanical, civil, or aerospace engineering projects to ensure components meet specifications across different unit systems.

Example: Convert 500 kPa to psi for a hydraulic system specification.

Science and Education

Quickly convert pressure values in physics or chemistry experiments, or for homework problems that involve different pressure units.

Example: Convert 2 atm to pascals for a gas law calculation.

Frequently Asked Questions

How do I convert pressure between units?
Select the unit you want to convert from in the 'Convert from' dropdown, then select the unit you want to convert to in the 'Convert to' dropdown. Enter the value in the input field, and the calculator will show the equivalent pressure in the target unit.
What units does this pressure converter support?
This converter supports pascals (Pa), kilopascals (kPa), megapascals (MPa), bar, atmospheres (atm), and pounds per square inch (psi). These cover common scientific, engineering, and everyday pressure measurements.
Is the conversion accurate?
Yes, the conversion uses standard conversion factors. For example, 1 atm = 101325 Pa, 1 bar = 100000 Pa, and 1 psi = 6894.757 Pa. The calculator provides precise results based on these factors.

Tips & Common Mistakes

Tips

  • Double-check the unit you select in both dropdowns to avoid errors, especially when converting between similar units like kPa and MPa.
  • Use the converter for quick reference, but for critical applications, verify with official standards or calibrated instruments.
  • Remember that 1 bar is approximately equal to 1 atmosphere, but not exactly: 1 atm = 1.01325 bar.
  • When converting from psi, note that psi is a pound-force per square inch; ensure you are using the correct value for your context.

Common Mistakes to Avoid

  • Confusing kilopascals (kPa) with megapascals (MPa) – 1 MPa equals 1000 kPa, so a factor of 1000 is often missed.
  • Assuming 1 bar equals 1 atm exactly – they differ by about 1.3%, which can matter in precise measurements.
  • Forgetting to select the correct 'Convert from' and 'Convert to' units, leading to reversed conversions.

Last updated: August 13, 2026