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How to Calculate Water Flow Rate in GPM

Water Flow Rate Formula:

\[ Q_{gpm} = Q \times 15850.3 \]

m³/s
gpm

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1. What is Water Flow Rate Conversion?

Definition: This calculator converts water flow rate from cubic meters per second (m³/s) to gallons per minute (gpm).

Purpose: It helps engineers, plumbers, and technicians work with flow rate measurements in different unit systems.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ Q_{gpm} = Q \times 15850.3 \]

Where:

Explanation: The conversion factor accounts for both volume (cubic meters to gallons) and time (seconds to minutes) conversions.

3. Importance of Flow Rate Conversion

Details: Proper flow rate calculation is essential for pipe sizing, pump selection, irrigation systems, and industrial process design.

4. Using the Calculator

Tips: Enter the flow rate in cubic meters per second (m³/s). The value must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why convert between m³/s and gpm?
A: Different industries use different units - metric (m³/s) vs. imperial (gpm) - and conversion is often needed for equipment specifications.

Q2: How accurate is the conversion factor?
A: The factor 15850.3 is precise, based on 1 m³ = 264.172 gallons and 1 minute = 60 seconds.

Q3: Can I use this for other liquids besides water?
A: Yes, as long as the liquid has similar density to water. For significantly different densities, additional calculations may be needed.

Q4: What's a typical flow rate in m³/s for household plumbing?
A: A standard shower might use about 0.00016 m³/s (2.5 gpm), while a kitchen faucet might use 0.000063 m³/s (1 gpm).

Q5: How do I measure flow rate in m³/s?
A: Use flow meters designed for metric measurements, or convert from other metric units (e.g., liters/second ÷ 1000 = m³/s).

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