Convert boost pressure between psi, bar, kPa, MPa, atm, inHg, and mmHg. Use this converter for turbocharger boost, supercharger boost, manifold pressure, absolute pressure, gauge pressure, and pressure ratio estimates.
PSI to bar:
bar = psi × 0.0689476
Bar to PSI:
psi = bar × 14.5038
PSI to kPa:
kPa = psi × 6.89476
Pressure ratio:
pressure ratio = absolute pressure ÷ atmospheric pressure
Boost pressure conversions are useful for turbochargers, superchargers, diesel engines, gasoline engines, boost gauges, tuning, data logs, compressor maps, manifold pressure, and comparing psi, bar, and kPa readings.
Use this converter as a unit reference. For tuning and engine safety, follow trusted vehicle, turbo, fuel system, and engine management guidance.
Your result shows the entered boost pressure converted into the selected unit. The converter also displays psi, bar, kPa, MPa, atm, inHg, mmHg, absolute pressure, gauge boost, and estimated pressure ratio.
Boost pressure alone does not determine engine power or safety. Air temperature, fuel quality, ignition timing, air-fuel ratio, turbo efficiency, intercooling, engine compression, and tuning all matter.
Multiply psi by 0.0689476. For example, 15 psi is about 1.03 bar.
Multiply bar by 14.5038. For example, 1 bar is about 14.5 psi.
Boost pressure is usually gauge pressure above atmosphere. Absolute pressure includes atmospheric pressure.
Pressure ratio is absolute manifold pressure divided by atmospheric pressure. It is commonly used with turbo compressor maps.
No. More boost can add airflow, but power and safety depend on fuel, timing, temperature, airflow efficiency, compression, and tuning.