1. What is GPM to LPM Conversion?

GPM to LPM conversion is the process of converting flow rate measurements from gallons per minute to liters per minute. This conversion is essential in various engineering, industrial, and scientific applications where fluid flow rates need to be expressed in different unit systems.

2. How Does the Calculator Work?

The calculator uses the conversion formula:

Where:

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

Explanation: The conversion factor 3.785 comes from the definition of US liquid gallon, which equals exactly 3.785411784 liters.

3. Importance of Flow Rate Conversion

Details: Accurate flow rate conversion is crucial for international engineering projects, fluid system design, pump specifications, and ensuring compatibility between equipment using different measurement systems.

4. Using the Calculator

Tips: Enter the flow rate in gallons per minute (gpm). The value must be positive. The calculator will automatically convert it to liters per minute (lpm).

5. Frequently Asked Questions (FAQ)

Q1: What is the exact conversion factor?
A: The exact conversion factor is 3.785411784 liters per gallon, but 3.785 is commonly used for practical calculations.

Q2: Does this conversion work for both US and UK gallons?
A: No, this calculator uses US gallons. UK gallons are larger (1 UK gallon = 4.54609 liters).

Q3: What are typical flow rates in gpm and lpm?
A: Residential water faucets: 1-2 gpm (3.8-7.6 lpm), shower heads: 2.5 gpm (9.5 lpm), garden hoses: 5-10 gpm (19-38 lpm).

Q4: When is this conversion most commonly used?
A: In hydraulic systems, water treatment plants, irrigation systems, and when working with international equipment specifications.

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