* All calculations are estimates. Actual requirements vary based on pool construction, local conditions, and product specifications.
How to Calculate Pool Surface Area
The calculator reports estimated interior floor-and-wall area; water footprint formulas below alone do not include walls. Rectangles use a sloped floor; curved and irregular shapes use an approximate perimeter and omit benches, steps and coves. Confirm a measured contractor takeoff before ordering. Calculating the surface area is the first step in determining how much paint, primer, or finish your pool needs. The formula changes depending on the geometric shape of your pool.
The simplest calculation. Multiply the length by the width.
Find the radius (half the diameter) and multiply it by itself, then by Pi (3.14).
Multiply the long length by the maximum width, then multiply by a curvature factor (approx. 0.8).
Measure the total length and the width of both “bulbs.” Add the widths together first.
Calculate the center as a rectangle, then add the area of the semi-circle ends.
Break the pool into two separate rectangles, calculate both, and add them together.
