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GPM Formula:
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GPM (gallons per minute) is a unit of measurement for flow rate, representing the volume of liquid passing through a system per minute. It's commonly used in plumbing, irrigation, and fluid dynamics applications.
The calculator uses the simple flow rate formula:
Where:
Explanation: This formula calculates how many gallons of liquid flow through a system each minute based on the total volume and time measurement.
Details: Accurate flow rate calculation is essential for designing plumbing systems, sizing pipes and pumps, planning irrigation systems, and ensuring proper system performance in various industrial and residential applications.
Tips: Enter the total volume in gallons and the time period in minutes. Both values must be positive numbers greater than zero for accurate calculation.
Q1: What's the difference between GPM and GPH?
A: GPM measures gallons per minute while GPH measures gallons per hour. To convert between them, multiply GPM by 60 to get GPH, or divide GPH by 60 to get GPM.
Q2: How accurate is this calculation?
A: The calculation is mathematically precise based on the inputs provided. Accuracy in real-world applications depends on precise measurement of volume and time.
Q3: Can I use this for any liquid?
A: Yes, the formula works for any liquid, but note that the result will be in gallons per minute regardless of the liquid type.
Q4: What are typical GPM values for household fixtures?
A: Standard values: showerheads 2.0-2.5 GPM, kitchen faucets 1.5-2.2 GPM, bathroom faucets 0.5-1.5 GPM, toilets 1.6-3.5 GPM per flush.
Q5: How does pipe size affect flow rate?
A: Larger diameter pipes typically allow higher flow rates with less pressure drop, while smaller pipes restrict flow and increase pressure requirements.