## PSI to GPM Calculator

A **1 PSI** is approximately **0.10 GPM**, a **psi to gpm calculator** is used to convert **water pressure** measured in **Pounds per Square Inch (PSI)** to **flow rate** measured in **Gallons per Minute (GPM)**.

The calculator takes into account factors such as **pipe diameter** and **fluid properties** to provide **accurate conversions**.

To calculate the **Gallons Per Minute (GPM)** from **pressure**, you typically use the following formula, which is derived from the **Bernoulli equation**:

$$ \text{GPM} = \text{K} \times \sqrt{\text{PSI}} $$

Where:

**$$\text{GPM}$$**is the flow rate in**gallons per minute**.**$$\text{K}$$**is a constant that depends on the specific**system**or**orifice**.**$$\text{PSI}$$**is the pressure in**pounds per square inch**.

The value of **$$\text{K}$$** is determined experimentally or provided by the **manufacturer** of the equipment. If you have a specific value for **$$\text{K}$$**, you can plug it into the formula along with the **pressure** to find the **GPM**.

**Example Calculation**

For example, if **$$\text{K} = 2$$** and the pressure (**$$\text{PSI}$$**) is **50**:

$$ \text{GPM} = 2 \times \sqrt{50} \approx 2 \times 7.07 \approx 14.14 $$

So, the flow rate would be approximately **14.14 GPM**.

## PSI to GPM Converter Formula

The general formula used in a PSI to GPM converter is derived from the **Bernoulli equation** and the **continuity equation**:

```
GPM = C * A * ā(2gh)
```

Where:

**GPM**is the flow rate in Gallons per Minute**C**is the**discharge coefficient**(typically between 0.6 and 1.0)**A**is the**cross-sectional area**of the pipe or orifice**g**is the**acceleration due to gravity**(32.2 ft/sĀ²)**h**is the**pressure head**in feet (PSI * 2.31)

- In a typical residential system with 3/4″ pipes,
**80 PSI**might produce around**15-20 GPM**. - Under similar conditions,
**50 PSI**could result in approximately**10-15 GPM**. - At
**100 PSI**, you might expect**20-25 GPM**in a residential system. **40 PSI**typically produces about**8-12 GPM**in standard residential plumbing.- At very low pressures like
**6 PSI**, flow rates are minimal, perhaps**1-2 GPM**or less.

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## Can you convert PSI to GPM?

**Yes**, it is possible to convert PSI to GPM, but it’s not a direct conversion. The relationship between pressure (PSI) and flow rate (GPM) depends on several factors, including:

**Pipe diameter****Pipe length****Fluid viscosity****Fluid temperature****Friction losses in the system**

To accurately **convert PSI to GPM**, you need to know these factors and use the appropriate formulas or a specialized calculator.

In many practical applications, professionals use **charts**, **tables**, or **software tools** that incorporate these variables to make the conversion.

## How do you calculate flow rate using PSI?

Calculating flow rate using PSI involves several steps:

**Determine the pressure difference**: Measure the pressure at two points in the system.**Calculate the pressure head**: Convert PSI to feet of head (1 PSI = 2.31 feet of head).**Measure the pipe diameter**: This is crucial for determining the cross-sectional area.**Apply the flow rate formula**: Use the formula mentioned earlier, adjusting for specific conditions.**Account for friction losses**: In real-world applications, friction in pipes reduces flow rate.

For a simplified calculation, you can use the **orifice flow equation**:

```
Q = Cd * A * ā(2gh)
```

Where:

**Q**is the flow rate**Cd**is the**discharge coefficient****A**is the**orifice area****g**is**gravitational acceleration****h**is the**pressure head**

## How do you convert pump GPM to PSI?

Converting pump **GPM to PSI **is essentially the **reverse process** of **PSI to GPM conversion**.

**Identify the pump curve**: This graph shows the relationship between flow rate and pressure for a specific pump.**Locate the GPM value**on the curve.**Read the corresponding PSI value**from the curve.

## PSI to GPM Conversion Chart

PSI | Calculated GPM (approx.) |
---|---|

20 | 6.5 |

40 | 9.2 |

60 | 11.3 |

80 | 13.0 |

100 | 14.5 |