Convert tire pressure between psi, kPa, and bar instantly. Includes quick picks for common car and bicycle pressures.
Tire Pressure
psi
kPa
bar
Frequently Asked Questions (FAQ)
How do I convert psi to bar?
Divide the psi value by 14.5038. More precisely, 1 psi = 0.0689476 bar (since 1 psi = 6894.76 Pa and 1 bar = 100 000 Pa). For example, 35 psi ÷ 14.5038 ≈ 2.41 bar.
How do I convert psi to kPa?
Multiply the psi value by 6.89476. One pound per square inch equals 6 894.757 Pa (6.894757 kPa). So 35 psi × 6.89476 ≈ 241.3 kPa.
What is the recommended tire pressure for a car?
Most passenger cars specify 30–35 psi (207–241 kPa, 2.07–2.41 bar) for standard tires, but the exact value depends on the vehicle and load. Always check the placard on the driver-side door jamb or the owner's manual — not the tire sidewall, which shows the maximum pressure.
Why do bicycle tires need much higher pressure than car tires?
Bicycle tires are much narrower, so they need higher pressure to support the same load without bottoming out. Road bike tires (23–25 mm wide) typically run at 80–130 psi (552–896 kPa). Mountain bike tires (2.2–2.4 in wide) run at 25–35 psi. Car tires are far wider and carry more air volume, so 30–35 psi is enough.
Disclaimer
Always verify tire pressure with a calibrated gauge. Converted values are rounded for display.
