Boost Horsepower Calculator
Calculate how much horsepower a turbocharger or supercharger adds to your naturally aspirated engine
Calculate Boost Horsepower
Original engine power without forced induction
Turbocharger or supercharger boost pressure
Common Boost Levels
Boost Results
Performance Category: Mild Boost
Formula: Boosted Power = (P + 14.7) / 14.7 × N
Boost Pressure (PSI): 6.0 psi
Original Power (HP): 0.0 hp
Boost Ratio: 0:1
Performance Analysis
Example Calculation
Typical Turbo Setup Example
Engine: 2.0L naturally aspirated inline-4
Original Power: 150 hp
Turbocharger: Small turbo at 8 psi boost
Setup: Stage 1 tune with supporting modifications
Calculation
Boosted Power = (P + 14.7) / 14.7 × N
Boosted Power = (8 + 14.7) / 14.7 × 150
Boosted Power = 22.7 / 14.7 × 150
Boosted Power = 1.544 × 150
Boosted Power = 231.6 hp
Power Gain = +81.6 hp (+54.4%)
Boost Pressure Guide
Turbo vs Supercharger
Turbocharger
✓ Uses exhaust gas energy
✓ Better fuel efficiency
✓ No parasitic power loss
âš Turbo lag at low RPM
âš Heat and complexity
Supercharger
✓ Instant throttle response
✓ Consistent power delivery
✓ Simpler installation
âš Uses engine power to drive
âš Higher fuel consumption
Understanding Forced Induction Power Gains
How Does Forced Induction Work?
Forced induction systems (turbochargers and superchargers) compress intake air, allowing more air and fuel to enter the combustion chamber. This results in more powerful combustion and increased engine output.
Key Benefits
- •Significant power increase without engine displacement increase
- •Better power-to-weight ratio
- •Improved engine efficiency at altitude
- •Cost-effective performance modification
Formula Explanation
Boosted Power = (P + 14.7) / 14.7 × N
- P: Boost pressure (psi)
- N: Naturally aspirated power (hp)
- 14.7: Standard atmospheric pressure (psi)
- Result: Total boosted power output
Note: This formula provides theoretical power gains. Real-world results may vary based on engine efficiency, air temperature, fuel quality, and tuning.