Conversion tool
Convert bar to pounds per square inch 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 psi
Rounded for readability. Use the arrows to increase or decrease the number of shown digits.
Estimation mode
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Disclaimer: Use calculations at your own risk. For critical applications, verify results against your governing standards/specifications.
How it works
We use psi = bar x 14.503773773.
Exact relationship: 1 bar = 14.503773773 psi.
Example: 1 bar = 14.504 psi.
Notes: Results are rounded in the default view.
Examples
- 1 bar = 14.504 psi
- 10 bar = 145.038 psi
- 200 bar = 2900.755 psi
FAQ
What physical quantity do bar and pounds per square inch express?
Bar express pressure at a convenient engineering scale close to atmospheric conditions and are common in equipment ratings and fluid systems. Pounds per square inch express pressure, meaning force distributed over an area rather than a simple force or distance quantity.
What is the difference between bar and pounds per square inch?
Bar and pounds per square inch 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 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.
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.
Were the bar and pound per square inch discovered by a specific person?
The bar came from technical standardization rather than discovery by one person. PSI was not discovered by a single person; it emerged from established customary force and area units used together as a pressure measure.
Where are bar and pounds per square inch used in science and engineering?
Bar is used in process systems, compressors, hydraulics, refrigeration, automotive service, and European industrial documentation. PSI is common in hydraulics, pneumatics, pressure gauges, compressors, tire service, and U.S.-oriented 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
- Exact constant used: 1 bar = 14.503773773 psi.
- Pressure conversions are derived from consistent force-per-area relationships anchored to the pascal.