Bar to PSI Converter
Enter a value to instantly convert between pressure units.
1 Bar = 14.5038 Pound per Sq. Inch
Key Formulas
Pound per Sq. Inch → Bar
bar = psi × 0.0689476Bar → Pound per Sq. Inch
psi = bar × 14.5038Atmosphere → Pound per Sq. Inch
psi = atm × 14.6959Pound per Sq. Inch → Atmosphere
atm = psi × 0.068046Formula
psi = bar × 14.50377Bar is the international pressure unit (roughly 1 atmosphere). PSI is the US standard. Converting bar to psi is common when reading European equipment manuals, working with international standards, or comparing pressure ratings. Most modern gauges support both units.
Source: NIST SP 811, Table B.8
Frequently Asked Questions
Real-World Examples
Typical car tire specification. European cars are often labeled 2.1-2.3 bar; that's roughly 30-33 psi for US drivers.
2.2 bar = 31.9 psi
Baseline pressure (1 atmosphere). Sea-level air pressure is 1 bar, equivalent to about 14.5 psi on a gauge.
1 bar = 14.5 psi
Industrial air compressor. Workshop systems at 6 bar output roughly 87 psi; used for pneumatic tools.
6 bar = 87 psi
High-pressure hose specification. Industrial or hydraulic equipment rated for 3.5 bar is safe up to 50-51 psi.
3.5 bar = 50.8 psi