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Converters

Pressure Converter

Convert pressure between SI units, bars, standard atmospheres and pounds per square inch.

Conversion factors explained belowNo live data needed

Value & units

Runs on your device

CONVERTED VALUE

Your result

Let’s calculate.

Use the Calculate button to see your result.

Review the method below for assumptions and conventions.

How to use this converter

  1. Enter value, from, to.
  2. Select Calculate to view the result.
  3. Check the method and assumptions below before using the result.

The method, explained

Convert to the base unit, then divide by the target factor. One bar is 100,000 pascals. One standard atmosphere is exactly 101,325 pascals.

A WORKED EXAMPLE

1 bar = 100 kPa; 1 atm = 101.325 kPa.

What to keep in mind

The atmosphere is a standard unit, not a live local atmospheric reading. Gauge and absolute pressures use different zero references.

Common questions

Does this convert gauge pressure to absolute?

No. A reference atmospheric pressure must be added separately for that conversion.

Is bar the same as atmosphere?

No. One bar is slightly smaller than one standard atmosphere.

Methodology maintained by ClarityKit. How these tools are built and checked.