The bar (metric pressure unit) and PSI (US customary pressure unit) both have exact definitions, making this a precise pressure conversion.
How it works
Multiplying bar by 14.5038 gives PSI; dividing PSI by that same constant gives bar back. Type into either field and the other updates instantly.
What this does not include
This does not include other pressure units like pascals or atmospheres — for those, use this site’s full pressure converter instead.
How to use this calculator
- Enter a value in either bar or PSI — the other field fills in automatically.
Frequently asked questions
Where is this conversion most commonly needed?
Tire pressure specifications, which are given in bar in most of the world and PSI in the US, and various industrial and scuba diving equipment ratings.
Why isn’t the ratio a round number?
Because a bar (defined directly in pascals) and a PSI (defined from pounds-force per square inch) come from two independently defined measurement systems.
What’s a typical car tire pressure?
Commonly around 2.2 to 2.5 bar, or roughly 32 to 36 PSI, though the correct value varies by vehicle — always check the manufacturer’s specification.
