Free Turbocharger Piping Air Velocity Calculator

Determine optimal charge piping diameter for your airflow targets. Calculate air velocity instantly to prevent pressure drop or piping restriction.

Calculated Air Velocity

0 FPS
0 m/s
Low (<200) Ideal (200-350) High (>400)

Enter values to start

Understanding Your Results

Air velocity in turbo piping is critical for maintaining throttle response and preventing pressure drop. If the velocity is too low (< 200 FPS), you may experience sluggish throttle response due to excessive pipe volume. If the velocity is too high (> 400 FPS), you create unnecessary restriction, causing the turbo to work harder (higher backpressure) to reach the same boost target, often leading to compressor surge or heat soak.

Note: These calculations use industry-standard air density at sea level. Actual results may vary based on temperature, altitude, and humidity.

The Formula

Velocity (FPS) = (CFM × 144) / (Area_in² × 60)

Where Area = π × (Diameter / 2)²

Unit Conversion

  • • lb/min to CFM: × 14.48 (at STP)
  • • mm to Inches: / 25.4
  • • FPS to m/s: × 0.3048