Flow Rate Conversion Relationship

The flow rate in liters per minute (LPM) can be converted from gallons per minute (GPM) using the following formula:

LPM = GPM × 3.785411784

Flow Rate Input:

Flow rate measures the volume of fluid passing through a point per unit time. Common units include:

• GPM (Gallons per Minute): Standard in the US for water flow.
• GPH (Gallons per Hour): Used for slower flows.
• GPD (Gallons per Day): Common in daily water usage.
• LPM (Liters per Minute): Metric unit for medium flows.
• L/s (Liters per Second): Metric unit for high flows.
• L/h (Liters per Hour): Metric unit for low flows.
• m³/h (Cubic Meters per Hour): Used in industrial settings.
• m³/s (Cubic Meters per Second): For large-scale flows.
• CFM (Cubic Feet per Minute): Common in HVAC systems.

Practical Applications

This converter is useful in various scenarios:

• Plumbing: Convert GPM from US systems to LPM for metric compatibility.
• Irrigation: Standardize flow rates for sprinkler systems.
• Engineering: Compare pump outputs between imperial and metric units.

Example Calculation

If the flow rate is 10 GPM, the conversion to LPM would be:

LPM = 10 × 3.785411784 = 37.8541 L/min

Similarly:

• GPH = 37.8541 × 15.850323141 ≈ 600 GPH
• L/s = 37.8541 ÷ 60 ≈ 0.6309 L/s
• m³/h = 37.8541 ÷ 1000 × 60 ≈ 2.2712 m³/h
• CFM = 37.8541 ÷ 28.316846592 ≈ 1.3368 CFM

Conversion Constants

Key conversion factors:

• 1 Gallon = 3.785411784 Liters
• 1 m³ = 1000 Liters
• 1 ft³ = 28.316846592 Liters
• 1 hour = 60 minutes = 3600 seconds
• 1 day = 1440 minutes

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