138 KPa to Bar

138 kPa = 1.38 bar

Calculation: bar = 138 kPa × 0.01 = 1.38 bar

KPa to Bar Converter

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How much pressure is 138 kPa?

20.0 psi (138 kPa) is comparable to the pressure inside an inflated balloon or a low-pressure tire.

What does 138 kPa look like?

Illustration of an inflated balloon
20.0 psi (138 kPa) is comparable to the pressure inside an inflated balloon or a low-pressure tire.

How to Convert KPa to Bar

1 kPa = 0.01 bar exact

Bar = KPa × 0.01

Example: 138 kPa × 0.01 = 1.38 bar

Reverse Conversion

To convert bar back to kPa:

  • Remember, 1 bar equals 100 kPa.
  • To convert 1.38 bar to kPa, multiply 1.38 x 100, resulting in 138 kPa.

exact This conversion factor is exact by international definition.

138 kPa is also equal to:

  • 138000 pascal
  • 20.015 psi
About these units

KPa: SI-derived pressure unit equal to 1,000 pascals (10³ Pa).

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

Frequently Asked Questions

How much is 138 kPa in bar?

138 kPa equals 1.38 bar. This is calculated by multiplying 138 by the conversion factor 0.01.

What does 138 kPa look like in bar?

138 kPa (1.38 bar) is near atmospheric to standard tire pressure (220-250 kPa).

How do you calculate 138 kPa to bar?

Multiply 138 by the conversion factor 0.01. The calculation is 138 × 0.01 = 1.38 bar. This factor is defined by international measurement standards.

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138 kPa = 1.38 bar
138 kPa = 1.38 bar — conversion chart

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

Also convert KPa 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.