PSI to GPM Calculator: Convert Pressure to Flow Rate
Convert pounds per square inch (PSI) to gallons per minute (GPM) based on pressure and pipe characteristics. This calculator helps you determine the flow rate achievable for a given pressure and pipe setup.
Understanding PSI to GPM Conversion
Converting pounds per square inch (PSI) to gallons per minute (GPM) is essential for determining the flow rate achievable in a pipe system based on pressure and pipe characteristics. This calculation helps in designing efficient fluid systems.
Key Factors in PSI to GPM Calculation
Several factors influence the flow rate achievable in a pipe system:
| Factor | Description | Impact on GPM |
|---|---|---|
| Pressure (PSI) | Force applied per unit area | Higher PSI increases GPM |
| Pipe Diameter | Internal diameter of the pipe | Larger diameter increases GPM |
| Pipe Length | Total length of the pipe | Longer pipes reduce GPM due to friction |
| Friction Loss | Resistance to flow in the pipe | Higher friction loss reduces GPM |
Formula for PSI to GPM Conversion
The formula to calculate GPM from PSI is:
GPM = (PSI × Area) / (Friction Loss × Pipe Length)
Where:
- PSI: Pressure in pounds per square inch
- Area: Cross-sectional area of the pipe (π × radius²)
- Friction Loss: Coefficient of friction loss in the pipe
- Pipe Length: Total length of the pipe in feet
Common Applications
| Application | Typical PSI Range | Typical GPM Range |
|---|---|---|
| Residential Water Supply | 40 - 60 PSI | 5 - 20 GPM |
| Irrigation Systems | 30 - 50 PSI | 10 - 50 GPM |
| Industrial Processes | 50 - 100 PSI | 50 - 500 GPM |
| Fire Protection | 100 - 150 PSI | 100 - 1000 GPM |
Frequently Asked Questions
What is the relationship between PSI and GPM?
PSI measures pressure, while GPM measures flow rate. The relationship depends on pipe diameter, length, and friction loss.
How does pipe diameter affect GPM?
Larger pipe diameters allow for higher flow rates (GPM) at the same pressure due to reduced resistance.
What is friction loss?
Friction loss is the resistance to flow caused by the pipe's interior surface. It reduces the effective pressure and flow rate.
Can I use this calculator for any fluid?
This calculator assumes water as the fluid. For other fluids, adjust for viscosity and density.
What is the typical friction loss coefficient?
For smooth pipes, the friction loss coefficient is typically around 0.02. For rough pipes, it may be higher.