PSI to Bar Converter
Enter a value to instantly convert between pressure units.
1 Pound per Sq. Inch = 0.0689 Bar
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
bar = psi × 0.0689476PSI (pounds per square inch) is used in the US for tires, water systems, and industrial equipment. Bar is the metric/international standard. The bar is approximately 1 atmosphere of pressure. Converting between them is essential for international equipment manuals and tire maintenance.
Source: NIST SP 811, Table B.8
Frequently Asked Questions
Real-World Examples
Car tire pressure. Most cars operate at 30-35 psi, which is roughly 2.1-2.4 bar. Check your door jamb sticker for specs.
32 psi = 2.21 bar
Bicycle tire pressure. Road bikes often need 80-130 psi (5.5-9 bar). Mountain bikes run 25-35 psi (1.7-2.4 bar).
50 psi = 3.45 bar
Air compressor output. Industrial systems and workshop compressors often operate at 90-100 psi (6-7 bar).
100 psi = 6.89 bar
Atmospheric pressure at sea level. 1 bar ≈ 14.5 psi, the baseline for pressure gauge readings.
14.7 psi = 1.013 bar