138 Pascals to Bar

138 Pa = 0.00138 bar

Calculation: bar = 138 Pa × 1 × 10⁻⁵ = 0.00138 bar

Pascal to Bar Converter

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How much pressure is 138 Pa?

0.020 psi (0.138 kPa) is comparable to a laboratory vacuum, such as inside a glass bell jar.

What does 138 Pa look like?

Illustration of a vacuum bell jar
0.020 psi (0.138 kPa) is comparable to a laboratory vacuum, such as inside a glass bell jar.

How to Convert Pascal to Bar

1 pascal = 1 × 10-5 bar exact

Bar = Pascal × 1 × 10-5

Example: 138 Pa × 1 × 10-5 = 0.00138 bar

Reverse Conversion

To convert bar back to pascals:

  • Remember, 1 bar equals 100000 pascals.
  • To convert 0.00138 bar to Pa, multiply 0.00138 x 100000, resulting in 138 Pa.

exact This conversion factor is exact by international definition.

138 Pa is also equal to:

  • 0.138 kPa
  • 0.020015 psi
About these units

Pascal: SI derived unit of pressure equal to one newton per square meter (N/m²).

Bar: Metric pressure unit equal to exactly 100,000 pascals.

Frequently Asked Questions

How much is 138 pascals in bar?

138 pascals equals 0.00138 bar. This is calculated by multiplying 138 by the conversion factor 1 × 10⁻⁵.

What does 138 pascals look like in bar?

138 pascals (0.00138 bar) is low pressure — sound pressure or gentle airflow.

How do you calculate 138 pascals to bar?

Multiply 138 by the conversion factor 1 × 10⁻⁵. The calculation is 138 × 1 × 10⁻⁵ = 0.00138 bar. This factor is defined by international measurement standards.

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138 pascals = 0.00138 bar
138 pascals = 0.00138 bar — conversion chart

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For general conversions between pascals and bar, see the pascals to bar converter.

Also convert Pascals to:

Conversion factors verified against NIST, BIPM, ISO 80000-4 1 atm = 101 325 Pa by definition (BIPM). Last reviewed: March 2026
Adilson Fernandes By Adilson Fernandes
Tiago Fernandes Reviewed by Tiago Fernandes

All unit conversions on CoolConversion use conversion factors defined or documented by internationally recognised standards bodies (such as ISO and NIST), including both SI and non-SI units.