Pipe Sizing Calculator
Calculate optimal pipe diameter based on flow rate and velocity limits
About this calculator
This pipe sizing calculator determines the optimal pipe diameter for fluid systems based on your specific flow rate requirements and velocity constraints. Proper pipe sizing is crucial for maintaining system efficiency, minimizing pressure losses, and preventing issues like erosion or excessive noise. Engineers, contractors, and facility managers use this tool to ensure their piping systems operate within safe velocity limits while meeting flow demands cost-effectively.
How to use
Enter your required flow rate in gallons per minute, liters per second, or cubic feet per minute. Input your maximum allowable velocity limit for the specific fluid and application. The calculator will instantly recommend the minimum pipe diameter needed to stay within your velocity constraints while accommodating the desired flow rate.
Frequently asked questions
What velocity limits should I use for different fluids?
Water systems typically use 4-8 ft/s, while corrosive fluids may require lower velocities around 2-4 ft/s to prevent erosion.
Does pipe material affect the sizing calculation?
The basic diameter calculation remains the same, but material roughness affects pressure drop and may influence your velocity limit selection.
Can I use this for both liquid and gas applications?
Yes, but gas applications require special consideration for compressibility effects and different velocity limit guidelines for optimal performance.