Pounds per Square Inch to Bar

Snapshot

1 Pounds per Square Inch equals 0.068948 Bar. Conversion Encyclopedia uses the same fixed conversion basis across the calculator, common values, and reverse page for this page.

Reference basis: This conversion uses exact pascal-based pressure definitions.
Example: For 5 Pounds per Square Inch, the result equals 0.344738 Bar.
Use the reverse page if you need the opposite direction with the same basis.

Use the interactive calculator below for custom values and the common-value table for quick checks.

Converter Calculator

0.068948 Bar (bar)

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Explanation

Formula: Bar = Pounds per Square Inch × 0.068948. Why: this is a cross-system pressure conversion. The calculator normalizes the value through pascals, then applies the exact target-unit constant for consistent engineering and reference use.

Pounds per square inch (psi): an imperial pressure unit widely used in tires, hydraulics, compressed gas systems, and general mechanical work.

Bar: a metric engineering pressure unit fixed at exactly 100,000 pascals, common in industrial systems, hydraulics, and process equipment.

This route is useful when translating pressure values across SI, metric engineering, and imperial conventions so datasheets, gauges, and calculations stay comparable.

This conversion is purely multiplicative because both units reduce through pascals using fixed pressure constants with no offset.

Method & Reference

Method basis: exact conversion formula shown in Snapshot.
Applied factor: 1 Pounds per Square Inch = 0.068948 Bar (using exact pascal-based pressure definitions).
Consistency rule: calculator output and table values use the same constants and rounding policy.

Common Conversion Values

Pounds per Square Inch (psi)	Bar (bar)
1	0.068948
5	0.344738
10	0.689476
14.7	1.013529
15	1.034214
30	2.068427
32	2.206322
35	2.413165
100	6.894757
200	13.789515
300	20.684272

Frequently Asked Questions

What is 1 pounds per square inch in bar?

1 Pounds per Square Inch equals 0.068948 Bar on this page.

Does this Pounds per Square Inch to Bar page use fixed pascal equivalents for psi or mmHg?

Yes. Psi and mmHg use fixed pascal equivalents on this page, so gauge, vacuum, and instrumentation values stay consistent across the direct answer, calculator, and table.

When would I convert pounds per square inch to bar?

This route is useful when translating pressure values across SI, metric engineering, and imperial conventions so datasheets, gauges, and calculations stay comparable.

How do I reverse Pounds per Square Inch to Bar?

Use the mirror Bar to Pounds per Square Inch route; it applies the inverse relationship with the same pressure assumptions.