MeasureCalc

Convert Pounds per square inch (psi) to Bar

Category: Pressure

2.068427 bar

30 psi = 2.068427 bar

Precision: 6 decimals; very small non-zero results use significant digits.

How to convert pounds per square inch (psi) to bar

Pressure is force per unit area. Pascals (and kPa, hPa) are SI, while bar and psi are widely used in engineering and scuba. Conversions must respect absolute vs gauge references when comparing values.

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Quick conversion table

Handy values for Pounds per square inch (psi) to Bar. Click a value to calculate that result.

Pounds per square inch (psi) Bar
2.068427
0.034474
0.172369
0.689476

Conversion formula

Use the following formula:

Bar ≈ Pounds per square inch (psi) × 0.068947572932

Convert pressure from Pounds per square inch (psi) to Bar using a fixed unit ratio. Round only the final result.

Common mistakes

  • Comparing gauge pressure (psig) with absolute pressure (psia/hPa) without converting reference.
  • Mixing bar with atm (1 atm = 1.01325 bar).

Unit facts

  • Pounds per square inch (psi): Pounds per square inch (psi) is common for tires, hydraulics, and scuba tanks (1 psi ≈ 6,894.76 Pa).
  • Bar: One bar is exactly 100,000 Pa; convenient near-atmospheric unit used in meteorology and diving.

About Pounds per square inch (psi)

Pounds per square inch (psi)

Imperial/US pressure unit. Common for tires, hydraulics, and compressors; often shown with gauge (psig) vs absolute (psia).

History: Industrial adoption in North America entrenched psi as a practical non-SI unit.

About Bar

Bar

Equals 100,000 Pa (exact). Handy engineering unit near mean sea-level pressure (≈1.01325 bar).

History: Introduced by early 20th-century meteorologists; remains popular in scuba, hydraulics, and weather.

Frequently asked questions

How many Bar are in one Pounds per square inch (psi)?
1 Pounds per square inch (psi) equals 0.068948 Bar.
Is Pounds per square inch (psi) to Bar conversion exact?
Many unit conversions are exact by definition, while others use standardized conversion constants.
What is the fastest way to convert Pounds per square inch (psi) to Bar?
Enter a value in Pounds per square inch (psi), choose Bar as the target unit, and the calculator will instantly return the result.

Convert Pounds per square inch (psi) to other units

Convert other units to Bar