1. What is GPM to LPH Conversion?

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

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

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Q_{lph} \) — Flow rate in liters per hour (LPH)
• \( Q_{gpm} \) — Flow rate in gallons per minute (GPM)
• 3.785 — Conversion factor (liters per gallon)
• 60 — Conversion factor (minutes per hour)

Explanation: The formula converts gallons to liters and minutes to hours in a single calculation.

3. Importance of Flow Rate Conversion

Details: Accurate flow rate conversion is essential for system design, pump sizing, and process control in both metric and imperial unit systems.

4. Using the Calculator

Tips: Simply enter the flow rate in gallons per minute (GPM) and the calculator will provide the equivalent in liters per hour (LPH).

5. Frequently Asked Questions (FAQ)

Q1: Why is the conversion factor 3.785?
A: 1 US gallon equals exactly 3.785411784 liters. We use 3.785 for practical calculations.

Q2: What's the difference between US and UK gallons?
A: This calculator uses US gallons (3.785 L). UK gallons are larger (4.546 L).

Q3: When would I need to convert GPM to LPH?
A: Common in international projects, equipment specifications, or when working with systems that use different unit standards.

Q4: How precise is this conversion?
A: The conversion is mathematically precise, though practical applications may require rounding.

Q5: Can I convert LPH back to GPM?
A: Yes, use the inverse formula: \( Q_{gpm} = Q_{lph} \div (3.785 \times 60) \).