Pool Area Calculator

Calculate pool surface area, pool gallons, perimeter, liner area, cover area, pool deck area, tile length, pump flow, chemical estimate, and pool project cost.

Calculate Pool Area

Pool Volume = Surface Area × Average Depth. Gallons = Cubic Feet × 7.48052.
Your result will appear here.

How the pool area calculator works

Rectangular pool mode:
The calculator multiplies pool length by pool width to estimate surface area, then uses average depth to estimate gallons.

Oval pool mode:
The calculator uses an ellipse formula to estimate pool area and an approximate oval perimeter.

Circular pool mode:
The calculator uses diameter to estimate pool area, circumference, volume, gallons, cover area, and pump flow.

Known area mode:
The calculator starts from your known pool area and estimates gallons, cover area, deck area, tile, pump flow, and cost.

Why use a pool area calculator?

A pool area calculator helps estimate swimming pool surface area, pool gallons, pool cover size, pool liner size, deck square footage, waterline tile, pump flow, and project cost.

It can help calculate square feet, cubic feet, gallons, perimeter, cover area, liner area, deck area, waterline tile area, chemical estimate, and pump gallons per hour.

What your result means

Your result shows pool surface area, perimeter, average depth, cubic feet, gallons, cover or liner area, deck area, tile area, pump flow, chemical estimate, water fill cost, and estimated project cost.

Pool area formulas

Frequently asked questions

How do I calculate pool surface area?

For a rectangular pool, multiply length by width. For a circular pool, use π times radius squared. For an oval pool, use π times half the length times half the width.

How do I calculate pool gallons?

Multiply pool surface area by average depth to get cubic feet, then multiply cubic feet by 7.48052 to estimate gallons.

How do I estimate pool cover size?

Add overlap to both sides of the pool length and width. Then multiply cover length by cover width and add waste if needed.

How do I estimate pool pump flow?

Divide pool gallons by your desired turnover time in hours. For example, a 24,000 gallon pool with an 8 hour turnover needs about 3,000 gallons per hour.

Is this pool calculator exact?

No. It is an estimate. Actual pool area, gallons, deck area, cover size, and materials can vary by pool shape, slopes, steps, benches, depth changes, curves, and installation method.