How to convert bar to pounds per square inch
Apply the documented bar-to-pounds per square inch relationship below, keeping the full stored constant until the displayed result is rounded.
Bar × 14.50377377 = Pounds per Square Inch
For example, 10 bar equals 145.0377377 psi.
Bar to Pounds per Square Inch reference table
| Bar | Pounds per Square Inch |
|---|---|
| 1 bar | 14.50377377 psi |
| 5 bar | 72.51886885 psi |
| 10 bar | 145.0377377 psi |
| 25 bar | 362.59434425 psi |
| 50 bar | 725.1886885 psi |
| 100 bar | 1,450.377377 psi |
Method and quality checks
- Calculation
- Bar × 14.50377377 = Pounds per Square Inch. 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 bar produces 145.0377377 psi. Check the direction and approximate scale before relying on a more precise displayed value.
Deeper method: Gauge and absolute pressure.
Bar and psi on equipment gauges
The bar is defined as exactly 100,000 pascals. Pounds per square inch uses the avoirdupois pound-force and international inch, giving approximately 14.50377377 psi for one bar.
- Confirm whether the source reports gauge pressure or absolute pressure.
- A conversion does not replace a tire placard or equipment safety specification.
- Round the result to the actual resolution of the gauge or sensor.
Reference: NIST pressure conversion factors.