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

1 psi equals 0.068948 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.

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

Use the shareable URL pattern: /convert/psi-to-bar/1

Category: Pressure

Value From To Precision

0.068948 bar

1 psi = 0.068948 bar

High-precision rounding: 6 decimals

We convert by pivoting through the SI base unit for Pressure and applying exact factors where applicable.

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Pressure is force per area; meteorology and engineering use various units.

Pounds per square inch (psi)

Imperial/US pressure unit.

History: Common in automotive and hydraulics.

Bar

100,000 Pa (exact).

History: Introduced in early 20th c. by meteorologists.