Pool volume calculator
Pool gallons for chemical dosing, heater sizing or refill planning.
Short answer: Rectangle: gal = L × W × avg depth × 7.48. Oval/round: multiply by 0.89. 32 × 16 ft × 5 ft avg = 19,150 gal. Enter your measurements above and the pool volume calculator returns the quantity, unit conversions and an estimated cost instantly, in imperial or metric — no sign-up needed.
What do you need to measure?
What is the answer?
Gallons (rectangle)
19,149
Gallons (oval/round)
17,042
Liters
72,478
How does the pool volume calculator work?
Rectangle: gal = L × W × avg depth × 7.48. Oval/round: multiply by 0.89.
What does a worked example look like?
32 × 16 ft × 5 ft avg = 19,150 gal.
What do people ask most?
›How do I find average depth?
Add shallow + deep depths, divide by two.
›Why 7.48?
7.48 US gallons in one cubic foot of water.
Which pool calculator should you use next?
Pool salt calculator →Free chlorine dose →Pool heater BTU calculator →pH decreaser (muriatic acid) calculator →Calcium hardness calculator →Pool pump run time calculator →Pool cover heat savings calculator →Pool refill cost calculator →Winterize chemical kit calculator →Above-ground round pool volume →
Where can you learn more?
Read field notes on estimating and materials, or browse every calculator we make.