How do I convert Pounds per square inch (psi) to Bar?

30 psi equals 2.068427 bar using SI-based conversion and precise factors.

What is the formula to convert Pounds per square inch (psi) to Bar?

This is a linear unit conversion using a constant factor between units.

How can I share a direct psi to bar result?

Use the shareable URL: https://measurecalc.com/convert/psi-to-bar/30

Convert Pounds per square inch (psi) to Bar

Q: Is Pounds per square inch (psi) to Bar conversion exact?

Yes, it uses exact definitions or standardized constants (e.g., 1 in = 25.4 mm).

Category: Pressure

Value From To Precision

2.068427 bar

30 psi = 2.068427 bar

High-precision rounding: 6 decimals

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.

This converter calculates Pounds per square inch (psi) to Bar values by using the correct conversion rule for the Pressure category. For linear units, standardized factors are used. For temperature, the calculator applies the proper formula with offsets.

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Quick conversion table

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

Pounds per square inch (psi)	Bar
30	2.068427
0.5	0.034474
2.5	0.172369
10	0.689476

Conversion formula

Linear unit conversions use standardized factors; many are exact by definition (e.g., 1 in = 25.4 mm, 1 ft = 0.3048 m).

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

psi → pa Pascal (Pa)
psi → atm Standard atmosphere (atm)
psi → torr Torr

Convert other units to Bar

pa → bar Pascal (Pa)
atm → bar Standard atmosphere (atm)
torr → bar Torr