Pool Volume by Size — Complete Reference Table

How to Use This Pool Volume Size Chart

Use this pool size volume chart to find your pool's volume without calculating. Tables below show volumes at standard depths — 4 ft (48 in) and 4.33 ft (52 in) for above-ground pools, 5 ft and 5.5 ft average depth for inground pools. All figures use inner wall-to-wall measurements, not outer frame or box dimensions.

If your water depth differs from the table standards, enter your exact dimensions into the pool volume calculator for a precise result. Results available in gallons or litres. For shapes not covered here — kidney, L-shaped, freeform — see the pool volume calculator by shape.

Round Pool Volume by Size

Round pools are the most common above-ground pool shape. Volumes below cover 10 ft to 33 ft diameter at two standard wall depths.

Round Pool Volume at 4.0 ft (48 in) Depth

Formula: D² × 4.0 × π/4 × 7.48052. Litres = US gal × 3.78541. Inner diameter used — not box size.

Round Pool Volume at 4.33 ft (52 in) Depth

Formula: D² × 4.33 × π/4 × 7.48052. Litres = US gal × 3.78541.

If your round pool diameter is not listed, enter the inner diameter and water depth into the round pool volume calculator for an exact result in both units.

Oval Pool Volume by Size (Above-Ground)

Oval above-ground pools use the ellipse factor (π/4 = 0.7854) applied to length × width — not a simple rectangle formula.

Formula: L × W × 4.0 × π/4 × 7.48052. Litres = US gal × 3.78541. Inner wall measurements used.

For oval sizes not shown above, enter your inner length, width and water depth into the oval pool volume calculator for a precise result.

Rectangular Pool Volume by Size (Inground)

Rectangular inground pools use average depth — most slope from a shallow end of 3.5 ft to a deep end of 7–8 ft, giving a 5–5.5 ft average.

Rectangular Pool Volume at 5.0 ft Average Depth

Formula: L × W × 5.0 × 7.48052. Litres = US gal × 3.78541. Average depth used — measure shallow end + deep end ÷ 2.

Rectangular Pool Volume at 5.5 ft Average Depth

Formula: L × W × 5.5 × 7.48052. Litres = US gal × 3.78541.

For rectangular pools with a depth outside 5.0–5.5 ft, enter your exact average depth into the rectangular pool volume calculator for a result matched to your pool.

Size Not Listed? Get an Exact Result

Option 1 — Use the calculator. Enter your exact length, width and depth into the pool volume calculator for an instant result in gallons and litres. Shape-specific calculators are available for above-ground, round, oval, and rectangular pools.

Option 2 — Apply the formula. Rectangular: L × W × avg depth × 7.48052. Round: D² × depth × π/4 × 7.48052. Oval: L × W × depth × π/4 × 7.48052. All return US gallons — multiply by 3.78541 for litres. For worked examples and constant explanations, see pool volume formulas.