Flow Rate Converter

Convert flow rate between liters/second, gallons/minute, cubic meters/hour, and more.

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    Convert flow rate measurements between different units including liters per second, gallons per minute, cubic meters per hour, and more with our professional flow rate converter.

    What is Flow Rate Converter?

    Flow rate is the volume of fluid that passes through a given surface per unit time.

    Understanding the Units

    Liters per Minute (L/min)

    Metric flow rate unit.

    Common Uses: Plumbing, pumps

    Gallons per Minute (GPM)

    Imperial flow rate unit.

    Common Uses: Plumbing in US

    Conversion: 1 GPM = 3.785 L/min

    Cubic Meters per Hour (m³/h)

    Large volume flow rate.

    Common Uses: Industrial applications

    Conversion: 1 m³/h = 16.67 L/min

    Common Flow Rate Conversions

    Example Flow Rate
    Shower head (water-saving) 6–8 L/min = 1.6–2.1 GPM
    Garden hose 15–20 L/min = 4–5.3 GPM
    Fire hydrant 1,000 L/min = 264 GPM
    Human heart (at rest) ~5 L/min = 1.3 GPM blood flow

    Conversion Formulas

    • Flow Rate = Volume ÷ Time (Q = V/t)
    • L/min to GPM: GPM = L/min ÷ 3.785
    • GPM to L/min: L/min = GPM × 3.785
    • L/min to m³/h: m³/h = L/min × 0.06
    • m³/h to L/min: L/min = m³/h ÷ 0.06

    Practical Examples

    Drinking water tap: 6–8 L/min = 1.6–2.1 GPM

    Household water heater throughput: 10–15 L/min = 2.6–4 GPM

    Industrial pump: 500 m³/h = 8,333 L/min = 2,200 GPM

    Irrigation drip line: 2–4 L/hour per emitter (very low flow)

    When to Use Each Unit

    L/min: Plumbing, medical devices, small pumps — metric standard
    GPM (gallons per minute): US plumbing codes, irrigation, fire suppression
    m³/h (cubic metres per hour): Industrial processes, HVAC, large-scale pumping

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