Multiply pressure in bar by 14.5038
The bar-to-PSI conversion factor (14.5038) derives from the pascal as the common base. 1 bar = 100,000 Pa; 1 PSI = 6,894.76 Pa, the force of one pound across one square inch (4.448 newtons across 6.4516 cm²). Dividing gives 14.5038 PSI per bar. The conversion is exact and linear — no temperature or fluid-density correction needed, because bar and PSI both measure absolute force per area, not gauge or differential pressure.
Bar and PSI both measure pressure but come from different traditions. The bar is a metric unit defined as exactly 100,000 pascals, roughly equal to atmospheric pressure at sea level. PSI (pounds per square inch) is the imperial unit dominant in the United States, used everywhere from tire gauges to hydraulic equipment.
One bar equals 14.5038 PSI. The two units coexist in everyday life: European car manuals quote tire pressures in bar, American gas station gauges read PSI, and most modern dual-scale gauges show both.
Bar-to-PSI conversion comes up constantly when reading mixed-region equipment manuals, ordering parts from foreign suppliers, or following service guides written for another market.
European cars list recommended tire pressure in bar (2.2-2.5 typical). US gas-station gauges read PSI. Quick conversion avoids over- or under-inflation when traveling or driving an import.
Aluminum 80 tanks rate 3000 PSI / 207 bar service pressure. Reading the wrong scale on a foreign-rented tank can lead to dangerous miscalculation of remaining air time.
Commercial espresso machines target 9 bar extraction pressure (~130 PSI). Home machines sometimes list PSI specs only. Calibrating an OPV (over-pressure valve) requires converting between the two.
European industrial hydraulics rate in bar; American spec sheets in PSI. Service manuals translated from one market to another frequently mix units within a single page.
Pneumatic tool requirements list PSI (90 PSI is the US woodworking standard); compressor regulators sold in EU markets often display bar. Convert to confirm the compressor can deliver tool spec.
1 bar equals approximately 14.504 PSI.
Normal tire pressure is about 2.0–2.5 bar (29–36 PSI).