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Unit converters · Common

Pressure converter

Convert pressure between pascals, bar, PSI, atmospheres, and dozens more units.

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How it works

Two steps, no account

1

Pick your units

SI pascals, everyday units (bar, PSI, atm), or specialty engineering and fluid-column units.

2

Enter a value

The result updates instantly as you type, or as soon as you change either unit.

FAQ

Common questions

Is my data sent anywhere?
No. The conversion runs entirely in your browser — nothing is transmitted, logged, or stored.
What's the difference between mmHg and inHg?
Both measure pressure as the height of a mercury column it can support — mmHg (used in blood pressure readings) and inHg (used in weather/barometric readings) just use different length units. This converter also distinguishes 32°F and 60°F mercury readings, since mercury's density shifts slightly with temperature.
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Pressure Converter

Convert pressure readings accurately between metric and imperial systems. Essential for engineering, meteorology, and automotive work.

How to Use

1. Enter Value

Type the pressure value.

2. Select Units

  • From: E.g., PSI.
  • To: E.g., Bar.

3. Result

See the converted value instantly.

Common Conversions

  • PSI to Bar: Common for tire pressure. 1 Bar ≈ 14.5 PSI.
  • Atm to Pascal: Standard scientific conversion. 1 atm = 101,325 Pa.
  • Torr to mmHg: Used in medicine and vacuum measurements. 1 Torr ≈ 1 mmHg.

Supported Units

We support a vast range of units including:

  • SI Units: Pascal (Pa), Kilopascal (kPa), Megapascal (MPa).
  • Imperial: PSI (Pounds per Square Inch), KSI.
  • Atmospheric: Standard Atmosphere (atm), Technical Atmosphere (at).
  • Meteorological: Bar, Millibar (mbar), Hectopascal (hPa).
  • Liquid Column: mmHg, inHg, cmH2O (for varying temperatures).

Technical Details

  • Precision: Calculations are performed with high precision.
  • Wide Range: From micro-pressures (micropascal) to massive geological pressures (Gigapascal).