4 Bar to Psi

4 bar ≈ 58.015 psi

Calculation: psi = 4 bar × 14.5038 ≈ 58.015 psi

Bar to Psi Converter

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How much pressure is 4 bar?

58.0 psi (400 kPa) is comparable to a mountain-bike or gravel-bike tire inflation pressure.

What does 4 bar look like?

Illustration of a mountain bike tire
58.0 psi (400 kPa) is comparable to a mountain-bike or gravel-bike tire inflation pressure.

Did you know? Mountain bike tire is 400 kPa.

MTB tires run at 200-400 kPa (30-60 psi). Lower pressure gives better grip off-road.

How to Convert Bar to Psi

1 bar = 14.5038 psi

Psi = Bar × 14.5038

Example: 4 bar × 14.5038 = 58.015 psi

Reverse Conversion

To convert psi back to bar:

  • Remember, 1 psi equals 0.0689476 bar.
  • To convert 58.015 psi to bar, multiply 58.015 x 0.0689476, resulting in 4 bar.

4 bar is also equal to:

  • 400000 pascal
  • 400 kPa
About these units

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

Psi: Imperial/US customary pressure unit equal to one pound-force per square inch.

Frequently Asked Questions

How much is 4 bar in psi?

4 bar equals 58.015 psi. This is calculated by multiplying 4 by the conversion factor 14.5038.

What does 4 bar look like in psi?

4 bar (58.015 psi) is moderate pressure — truck tires or compressed air tools.

How do you calculate 4 bar to psi?

Multiply 4 by the conversion factor 14.5038. The calculation is 4 × 14.5038 = 58.015 psi. This factor is defined by international measurement standards.

Share This Calculation

4 bar = 58.0151 psi
4 bar = 58.0151 psi — conversion chart

Nearby Conversions

1 bar14.5 psi 2 bar29.01 psi 3 bar43.51 psi 5 bar72.52 psi 6 bar87.02 psi 7 bar101.5 psi 8 bar116 psi 9 bar130.5 psi 10 bar145 psi 11 bar159.5 psi 12 bar174 psi 13 bar188.5 psi 14 bar203.1 psi

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

Also convert Bar 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.