Free Pool Tool | Ellis County, TX
Get a practical gallon estimate before you add chlorine, acid, salt, stabilizer, or any other chemical.
Quick answer
Most backyard pools in Ellis County run 15,000-25,000 gallons.
Plunge pools and small spool pools typically run 6,000-12,000 gallons, while large pools or pools with attached spas run 25,000-40,000 gallons.
If your measured number falls way outside what looks normal for your pool's footprint, remeasure — it's almost always an average-depth error.
Calculator
Fractions like 1/4 or 1/8 work in number fields. Results are planning estimates, not a binding service diagnosis.
Result
Save this number. It is the foundation for every chemical dose.
How to use the dose
Measure length, width, and average depth, then run the numbers to get a gallon estimate for every other calculator on this site.
Pro Take
The right gallon count keeps you from chasing chemistry all summer. If the number still feels off, A&M can measure the pool and run a full water panel on-site.
How to test
No test kit needed. You only need length, width, and average depth.
Companion Guide
Read the paired blog post for the plain-English version of the chemistry, testing, and common homeowner mistakes.
Read the guideFAQ
For rectangles it needs length, width, and average depth. For round pools it needs diameter and average depth. Oval, kidney, and freeform estimates use the closest average length, width, and depth you can measure.
Measure the shallow end and deep end, then average them only if the slope is even. For a hopper or long shallow shelf, take extra depth readings and use the depth that represents most of the water.
Yes. Use the rounded gallon result as the pool gallons input for chlorine, acid, salt, stabilizer, alkalinity, calcium, and shock doses. A wrong gallon count is the fastest way to under-dose or over-dose every product.