Estimated volume
16,000 gallons
exact: 15,989 gal
How pool volume is calculated
All of these formulas come down to surface area × average depth × 7.48 (the gallons in one cubic foot of water). Average depth is the shallow end plus the deep end, divided by two.
| Shape | Formula (gallons) |
|---|---|
| Rectangle | Length × Width × Avg depth × 7.48 |
| Circle | 3.14 × (Diameter ÷ 2)² × Avg depth × 7.48 |
| Oval | 3.14 × (L ÷ 2) × (W ÷ 2) × Avg depth × 7.48 |
| Kidney / freeform | 0.85 × Length × Width × Avg depth × 7.48 |
Field tip: for a freeform pool, measure the longest length and the widest width, then use the kidney formula. The 0.85 factor accounts for the curves — it's an estimate, but it's within a few percent for most residential shapes, and chemical dosing tolerates that comfortably.
Why the number matters
Every dose you add — chlorine, acid, salt — is calculated per gallon. Guess the volume 30% high and you're overdosing every visit; guess low and you're fighting algae with underdoses all summer. Measure once, write it down on the customer's profile, and every future visit starts from a real number.
Once you have the gallons, the chlorine dosing calculator turns a test reading into an exact dose.
