1. What is the GPM Formula?

The GPM (Gallons Per Minute) formula calculates flow rate from volume in cubic inches and time in minutes. It's commonly used in fluid dynamics and hydraulic systems to measure flow rates.

2. How Does the Calculator Work?

The calculator uses the GPM formula:

Where:

• \( GPM \) — Gallons per minute
• \( Volume \) — Volume in cubic inches (in³)
• \( Time \) — Time in minutes (min)
• \( 231 \) — Conversion factor (1 gallon = 231 cubic inches)

Explanation: The formula converts volume from cubic inches to gallons and divides by time to get flow rate in gallons per minute.

3. Importance of GPM Calculation

Details: Accurate GPM calculation is crucial for designing hydraulic systems, pump sizing, irrigation systems, and various industrial applications where fluid flow rates need to be measured and controlled.

4. Using the Calculator

Tips: Enter volume in cubic inches and time in minutes. Both values must be positive numbers greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: Why is 231 used in the formula?
A: 231 is the conversion factor from cubic inches to gallons (1 US gallon = 231 cubic inches).

Q2: What are typical GPM values for different applications?
A: Residential water systems: 5-10 GPM, irrigation systems: 10-20 GPM, industrial pumps: 50-500+ GPM depending on the application.

Q3: Can this formula be used for any fluid?
A: Yes, the formula works for any fluid, but the conversion factor of 231 is specific to US gallons. For imperial gallons, a different conversion factor would be needed.

Q4: How accurate is this calculation?
A: The calculation is mathematically precise. Accuracy depends on the precision of your volume and time measurements.

Q5: What if I have volume in different units?
A: Convert your volume to cubic inches first before using this calculator, or use a different formula with appropriate conversion factors.