Above-Ground Pool Water Volume & Chemical Cost Calculator

Get an accurate water volume for your pool and see estimated monthly chemical costs to keep it balanced and clean.

Pool shape

Diameter (round) or Length (rectangular) in feet

Width in feet (rectangular only, ignored for round)

Average depth (feet) — 4.5 ft

Chemical cost per 10,000 gallons per month ($)

Total Water Volume (gallons)

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Total gallons—

Estimated monthly chemical cost—

Estimated annual chemical cost—

About this calculator

Calculate the water volume of round or rectangular pools and estimate the cost of chlorine, shock, and pH balancer chemicals needed to treat it.

How accurate is the gallon estimate?

This uses standard geometric formulas (7.48 gallons per cubic foot). Actual volume can vary slightly with sloped floors or irregular shapes.

How is average depth determined for sloped pools?

Average the shallow and deep end depths, or use your pool's rated average depth from the manufacturer if available.

Does chemical cost vary by season?

Yes, hot weather and heavy use typically increase chlorine demand. This estimate assumes a steady average usage rate.