Gallons of Water in a Well

The Gallons in a Well calculator computes the number of gallons of standing water in the water column of a well.

INSTRUCTIONS: Choose units and enter the following:

• (TD) Total Depth of Well
• (SWL) Distance from Top to Static Water Level
• (WD) Well Diameter 

Gallons in a Well (V):The calculator returns the volume in gallons.  However, this can be automatically converted to many other volume units (e.g. liters, cubic inches) via the pull-down menu. 

The Math / Science

The formula for the gallons of standing water in a well is:

           V = (TD-SWL)⋅π⋅(WD/2)²

where:

• V - Volume of Water in Well
• TD - Total Depth of Well
• SWL - Static Water Level
• WD - Diameter of Well

For Jamie.

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