Conversion tool

Convert pounds per square inch to bar instantly

Enter a value, see the result, copy it, and save a PDF snapshot.

Input

Type a value, then press Enter to calculate.

Result

0.000 bar

Digits 3

Rounded for readability. Use the arrows to increase or decrease the number of shown digits.

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Notes

Use this space for project notes before saving as PDF.

Disclaimer: Use calculations at your own risk. For critical applications, verify results against your governing standards/specifications.

How it works

We use bar = psi x 0.0689475729317.

Exact relationship: 1 psi = 0.0689475729317 bar.

Example: 10 psi = 0.689 bar.

Notes: Results are rounded in the default view.

Examples

FAQ

What physical quantity do pounds per square inch and bar express?

Pounds per square inch express pressure, meaning force distributed over an area rather than a simple force or distance quantity. Bar express pressure at a convenient engineering scale close to atmospheric conditions and are common in equipment ratings and fluid systems.

What is the difference between pounds per square inch and bar?

Pounds per square inch and bar both express pressure, but they belong to different technical conventions and are favored in different industries and regional documentation systems.

What is the history of the pound per square inch?

PSI developed from customary force and area units and remains deeply embedded in U.S. pneumatics, hydraulics, tire pressure, and industrial equipment references.

What is the history of the bar?

The bar was introduced as a practical pressure unit in metric-oriented technical work and remains common outside the formal SI base-unit preference.

Were the pound per square inch and bar discovered by a specific person?

PSI was not discovered by a single person; it emerged from established customary force and area units used together as a pressure measure. The bar came from technical standardization rather than discovery by one person.

Where are pounds per square inch and bar used in science and engineering?

PSI is common in hydraulics, pneumatics, pressure gauges, compressors, tire service, and U.S.-oriented industrial documentation. Bar is used in process systems, compressors, hydraulics, refrigeration, automotive service, and European industrial documentation.

Why do pressure units matter in calculations?

Pressure units affect equipment ratings, seal selection, material limits, safety settings, and process controls. Keeping the unit visible helps prevent dangerous unit mistakes.

Can I trust this for critical calculations?

Use this for convenience and verify against your governing standard, equipment manual, or controlled specification for critical work. Pressure interpretation and safe limits depend on the system context.

References