How to convert pounds per square inch to bar
Apply the documented pounds per square inch-to-bar relationship below, keeping the full stored constant until the displayed result is rounded.
Pounds per Square Inch × 0.06894757293 = Bar
For example, 10 psi equals 0.68947573 bar.
Pounds per Square Inch to Bar reference table
| Pounds per Square Inch | Bar |
|---|---|
| 1 psi | 0.06894757 bar |
| 5 psi | 0.34473786 bar |
| 10 psi | 0.68947573 bar |
| 25 psi | 1.72368932 bar |
| 50 psi | 3.44737865 bar |
| 100 psi | 6.89475729 bar |
Method and quality checks
- Calculation
- Pounds per Square Inch × 0.06894757293 = Bar. The calculator keeps the stored factor through the operation and rounds only the displayed result to the selected or page-supported precision.
- Unit convention
- This page changes pressure units, not the reference basis. Gauge pressure and absolute pressure must be identified before conversion.
- Input validation
- Finite numeric inputs are accepted. Results outside the supported numeric range are rejected instead of being displayed as valid measurements.
- Reasonableness check
- 10 psi produces 0.68947573 bar. Check the direction and approximate scale before relying on a more precise displayed value.
Deeper method: Gauge and absolute pressure.
Pressure units on gauges and specifications
Pounds per square inch and bar commonly appear together on tire, compressor, and equipment gauges. This converter changes only the unit; it does not determine a safe or recommended operating pressure.
- Use the vehicle placard or manufacturer specification for the target pressure.
- Check whether a value is gauge pressure or absolute pressure.
- Round to the resolution of the gauge you can actually read.
Reference: NIST pressure conversion factors.