Unit Converter
PSI to Bar Converter
Convert PSI to bar instantly. 1 psi = 0.0689476 bar. Free, accurate unit conversion for pressure measurements.
Bar
0.068948 bar
1 psi = 0.068948 bar
PSI to Bar formula
bar = psi × 0.068948PSI (pounds per square inch) and bar are both units of pressure. PSI is primarily used in the US and imperial systems, while bar is the metric standard. The conversion factor of 0.0689476 comes from the relationship between the pound-force unit and the pascal (SI unit of pressure), with bar defined as exactly 100,000 pascals.
PSI to Bar conversion table
| PSI (psi) | Bar (bar) |
|---|---|
| 1 psi | 0.068948 bar |
| 2 psi | 0.137895 bar |
| 5 psi | 0.344738 bar |
| 10 psi | 0.689476 bar |
| 20 psi | 1.379 bar |
| 30 psi | 2.0684 bar |
| 50 psi | 3.4474 bar |
| 100 psi | 6.8948 bar |
| 200 psi | 13.7895 bar |
When you need to convert psi to bar
- Checking tire pressure specifications when comparing US vehicle manuals to European documentation
- Adjusting water system pressure in plumbing when switching between US and metric equipment
- Verifying hydraulic system pressures in industrial machinery with mixed-origin components
- Converting pressure ratings on gas cylinders or compressed air tanks for safety compliance
Frequently asked questions
Why is the conversion factor 0.0689476?
This factor represents the exact ratio between one pound-force per square inch and one bar. Since 1 bar equals 100,000 pascals and the pound-force relationship to pascals is fixed, multiplying PSI by 0.0689476 gives the precise bar equivalent.
Which unit is more commonly used globally?
Bar is the metric standard used in most countries and scientific contexts. PSI remains dominant in the United States, Canada, and some industries like automotive and aviation. Many modern products list pressure in both units for clarity.
Is this conversion exact or approximate?
The factor 0.0689476 is the accepted standard conversion. For most practical applications like tire pressure or plumbing work, this precision is more than sufficient and matches industry specifications.