Tire Pressure Converter
Enter a tire pressure value and choose your source and target units to convert instantly between PSI (used in the US), bar, and kPa (both common outside the US).
How the Tire Pressure Converter formula works
Every unit routes through kPa as a common base:
value_in_kPa = value × factor_of_source_unit result = value_in_kPa / factor_of_target_unit
For example, 1 PSI ≈ 6.895 kPa and 1 bar = 100 kPa exactly.
Step-by-step calculation
- Multiply the entered value by its unit's conversion factor to get kPa.
- Divide by the target unit's conversion factor.
- Round to a sensible number of decimal places.
Worked example
Converting 32 PSI (a common car tire pressure) to bar: 32 × 6.895 = 220.6 kPa. 220.6 / 100 = 2.21 bar.
Frequently asked questions
Why do different countries use different tire pressure units?
It follows the same regional measurement conventions as other pressure and metric units — the US predominantly uses PSI, while most of Europe and many other regions use bar or kPa, both metric-based units.
Where do I find my vehicle's recommended tire pressure?
It's typically listed on a sticker inside the driver's door jamb, in the vehicle owner's manual, or sometimes on the fuel filler door — not on the tire itself, which shows the tire's maximum rated pressure rather than the recommended one.