Knowing your exact pool capacity is the foundation of pool chemistry. Enter your dimensions below to get your exact volume in gallons or liters.
Guessing your pool's capacity is the number one reason homeowners struggle with cloudy water. If you don't know your volume, you cannot dose chemicals accurately.
If you want to do the math manually, calculating pool volume requires two steps: finding the Cubic Volume, and then multiplying it by a conversion factor to get gallons or liters.
Length × Width × Avg Depth = Cubic Ft
Once you have your cubic feet, multiply that number by 7.48 (the number of gallons in one cubic foot of water).
L × W × Avg Depth × 0.45 = Cubic Ft
For organic freeform shapes, the industry standard is to treat it like a rectangle, but multiply the final result by a 0.45 tolerance modifier to account for the curved edges.
To find the average depth, measure the depth of the shallow end and the deep end. Add these two numbers together, and divide by two. Example: (3ft + 8ft) / 2 = 5.5 ft average depth.
If you underestimate your volume, you will under-dose your chemicals, allowing algae to bloom. If you overestimate, you will waste money on excess shock and risk bleaching your pool liner or irritating swimmers' skin.
Kidney pools are tricky. Measure the longest length, the widest width, and the narrowest width. Add the widest and narrowest widths together and divide by two to get an average width. Then use the standard rectangular formula with a 0.45 modifier.
Now that you know exactly how many gallons your pool holds, use our suite of free tools to calculate your exact chemical dosages.