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Flow Rate Converter

Convert between liters per minute, gallons per minute, cubic meters per hour, and other flow units.

Our free Flow Rate Converter lets you convert between liters per minute, gallons per minute, cubic meters per hour, and other flow units. It is built for travelers, cooks, students, scientists, and anyone working across measurement systems who need fast, reliable results without installing software or creating an account.

Flow Rate Converter runs entirely in your browser on CalculatorsPlus — enter your values, get instant results, and copy or share your output in one click. Your data never leaves your device; we do not store inputs on any server.

Switching between metric and imperial units is a daily need worldwide. The flow rate converter uses standard conversion factors so you get consistent results for recipes, travel, homework, and technical specifications.

Results update in real time as you change inputs, so you can explore "what if" scenarios — adjust one variable at a time to see how it affects the outcome before committing to a purchase, plan, or decision.

This page includes step-by-step instructions, frequently asked questions, and practical tips below the calculator. Bookmark it for repeat use — many unit conversion tasks come up weekly during projects, studies, or financial planning.

Common Uses

  • Convert recipe measurements between US and metric units
  • Translate specs for international projects or products
  • Science and engineering homework unit checks
  • Travel, fitness, and weather temperature conversions

How to Use the Flow Rate Converter

  1. 1

    Select flow unit

    Choose L/min, GPM, or m³/h.

  2. 2

    Enter flow rate

    Input the value from specs or measurements.

  3. 3

    Convert

    Compare pumps, plumbing, or irrigation specs.

💡 Tips & Tricks

  • Check US vs UK gallon for GPM calculations.
  • HVAC specs may use CFM (cubic feet per minute) for air.
  • Fire sprinkler codes specify minimum flow rates.

Frequently Asked Questions

How do I convert GPM to L/min?
1 US gallon per minute (GPM) ≈ 3.785 liters per minute. Divide L/min by 3.785 to get GPM.
What is cubic meters per hour used for?
m³/h measures volumetric flow in HVAC, water treatment, and industrial piping. 1 m³/h ≈ 4.4 GPM.
How does pipe diameter affect flow rate?
Flow rate depends on velocity and cross-section area. Doubling pipe diameter quadruples area at the same velocity.
What is a standard shower flow rate?
Modern low-flow showerheads: 1.5–2.5 GPM (6–9.5 L/min). Older heads may be 5+ GPM.