Enter your engine's Base Horsepower (Naturally Aspirated), Boost Pressure (Gauge), Atmospheric Pressure, and Forced Induction Efficiency to calculate your Total Boosted Horsepower — plus your Horsepower Gain, Percentage Increase, and Pressure Ratio so you know exactly how much your forced induction setup is adding to the mix.
Total Boosted Horsepower
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Horsepower Gain
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Percentage Increase
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Pressure Ratio
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Boost pressure forces more air into the engine, allowing more fuel to be burned and generating more power. The relationship is roughly linear - more air pressure means more power potential.
Turbochargers use exhaust gases to compress air, while superchargers are belt-driven by the engine. Both create boost pressure, but superchargers provide immediate response while turbos are more efficient at higher RPMs.
Generally, you can expect 6-8% horsepower increase per PSI of boost. A 300 HP engine with 10 PSI boost might gain 180-240 HP, depending on efficiency and engine design.
Atmospheric pressure is the natural air pressure at your location (14.7 PSI at sea level). Higher altitudes have lower pressure, affecting the calculation of total pressure ratio and power output.
Efficiency depends on intercooler effectiveness, piping design, turbo/supercharger quality, and engine tuning. Well-designed systems achieve 85-90% efficiency, while basic setups may only reach 75-80%.
Yes, engine internals, fuel system, and cooling capacity limit boost levels. Most stock engines safely handle 6-10 PSI, while built engines can handle 15-30+ PSI depending on construction.
It depends on boost level and base engine strength. Low boost (5-8 PSI) may be safe on stock engines, while higher boost typically requires forged pistons, stronger rods, and upgraded fuel systems.