Same input, every pressure unit — tap a tile to set the right-hand unit.
PSI to bar for tires and boost
1 bar ≈ 14.5 psi; 1 psi ≈ 6.895 kPa.
Door placards may show psi while your gauge reads bar — convert before you fill.
Boost and tire pressure share units; they do not share safe operating ranges.
DIY tire fills go wrong when the written spec is 35 psi and the gauge face is in bar. Boost controllers, fuel pressure regs, and European service data add more mix-ups. This pressure converter handles psi, bar, kPa, and atmospheres for quick shop checks.
Enter the placard or gauge reading, set the source unit, and read the board. For load-based tire pressure changes, follow up with a dedicated tire pressure calculator once units agree.
Never treat a tire psi target as a boost target — same conversion math, totally different parts.
How to convert pressure units
Read the spec or gauge. Note whether the number is psi, bar, or kPa.
Enter it and select the source unit. Swap to the unit your compressor or controller displays.
Set pressure with matching units. Fill or adjust only after the gauge and target use the same system.
Pressure converter FAQ
Divide psi by about 14.504 to get bar (or multiply by 0.06895). Example: 32 psi ≈ 2.21 bar. Enter psi here to read bar on the result board.
Use the vehicle door placard (cold pressure) as the authority. This tool only changes units — it does not pick a pressure for load or speed.
Yes, especially on metric placards and TPMS data. 220 kPa is about 32 psi. Convert carefully; a 10× mistake is common when people confuse kPa and bar.
Yes for unit conversion (psi ↔ bar). Boost targets still come from your tune — converting 10 psi of boost is not related to a 10 psi tire fill.