Well Water Flow Rate Calculator

Calculate the flow rate of your well water system based on pipe dimensions and water pressure

Input Parameters

Typical range: 0.01-0.1 for turbulent flow

Calculation Results

Calculation Formula

Flow Rate (Q) = π × D² × (ΔP/4fL)

Where:
Q = Flow Rate (gpm)
π = 3.14159
D = Pipe Diameter (inches)
ΔP = Pressure Drop (psi)
f = Friction Factor
L = Pipe Length (feet)

Flow Rate:

0.00 gpm

Pressure Drop:

0.00 psi

Reynolds Number:

0.00

Well Water Flow Rate Calculator Calculator Usage Guide

Learn how to use the calculator and understand the principles behind well water flow rate calculations

How to Use This Calculator

  1. Enter the pipe diameter in inches (common well pipe sizes are 1.25", 1.5", 2" or 2.5")
  2. Input the pipe length in feet from the well to your main water tank or point of use
  3. Measure and enter the water pressure in psi at the point where the flow will be measured
  4. Adjust the friction factor if you know the specific value for your pipe type (leave at default 0.02 for most cases)
  5. Click "Calculate" to determine the flow rate and other parameters

Understanding Flow Rate

Flow rate (measured in gallons per minute or gpm) indicates how much water your well can deliver. This is crucial for:

  • Ensuring adequate water supply for household needs
  • Designing irrigation systems
  • Proper sizing of pumps and pressure tanks

Interpreting Results

The calculator provides three key values:

  • Flow Rate: The actual water delivery capacity in gallons per minute
  • Pressure Drop: The pressure loss in the pipe system, which may affect system performance
  • Reynolds Number: A dimensionless value indicating whether the flow is laminar or turbulent

Note: This calculator uses simplified equations for educational purposes. For precise engineering calculations, consult with a professional water system designer.