1. What is GPM to LPM Conversion?

Definition: This calculator converts flow rate from gallons per minute (GPM) to liters per minute (LPM).

Purpose: It helps engineers, technicians, and professionals working with fluid systems to convert between imperial and metric flow rate units.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Q_{lpm} \) — Flow rate in liters per minute (LPM)
• \( Q_{gpm} \) — Flow rate in gallons per minute (GPM)
• \( 3.785 \) — Conversion factor (1 gallon = 3.785 liters)

Explanation: The GPM value is multiplied by 3.785 to convert it to LPM.

3. Importance of Flow Rate Conversion

Details: Accurate conversion between units is essential for system design, equipment specification, and international collaboration in fluid systems.

4. Using the Calculator

Tips: Enter the flow rate in GPM (default is 10 GPM). The calculator will automatically compute the equivalent in LPM.

5. Frequently Asked Questions (FAQ)

Q1: Why is the conversion factor 3.785?
A: This comes from the definition that 1 US gallon equals exactly 3.785411784 liters.

Q2: Does this work for both US and UK gallons?
A: No, this calculator uses US gallons (1 US gal = 3.785 L). UK gallons are different (1 UK gal = 4.546 L).

Q3: What are common applications for this conversion?
A: Used in hydraulic systems, water treatment, irrigation, and any application where flow rates need to be specified in different unit systems.

Q4: How precise is this conversion?
A: The conversion factor is exact, but practical measurements may have instrument precision limitations.

Q5: Can I convert LPM back to GPM?
A: Yes, simply divide the LPM value by 3.785 to get GPM.