# Pool Volume Calculator

> Calculate swimming pool water volume in gallons and liters for rectangular, circular, and oval pools

**Category:** Math
**Keywords:** pool, swimming pool, volume, gallons, liters, water, capacity, rectangular, circular, oval
**URL:** https://complete.tools/pool-volume-calculator

## How it calculates

To calculate the volume of water in a pool, the tool uses different formulas based on the pool shape. For a rectangular pool, the formula is: Volume = Length × Width × Depth. For a circular pool, the formula is: Volume = π × Radius² × Depth, where π (pi) is approximately 3.14. For an oval pool, the formula is: Volume = π × (Length ÷ 2) × (Width ÷ 2) × Depth. In these formulas, 'Length' and 'Width' refer to the dimensions of the pool, 'Depth' is the average depth of the water, and 'Radius' is half the diameter of the circular pool. The output is converted from cubic feet to gallons (1 cubic foot = 7.48 gallons) or to liters (1 cubic foot = 28.3168 liters). This ensures that users receive accurate volume measurements in both common units of measurement.

## Who should use this

Pool maintenance technicians calculating water volume for chemical balancing, landscape architects designing residential pool layouts, and environmental engineers assessing water usage for sustainability projects. Additionally, homeowners planning to fill or renovate pools can benefit from this tool to estimate the required water quantity accurately.

## Worked examples

Example 1: A rectangular pool is 20 feet long, 10 feet wide, and has an average depth of 5 feet. Using the formula: Volume = Length × Width × Depth = 20 × 10 × 5 = 1000 cubic feet. To convert to gallons: 1000 × 7.48 = 7480 gallons.

Example 2: A circular pool has a radius of 8 feet and an average depth of 4 feet. Using the formula: Volume = π × Radius² × Depth = 3.14 × (8)² × 4 = 3.14 × 64 × 4 = 804.16 cubic feet. To convert to liters: 804.16 × 28.3168 = 22,751.36 liters.

Example 3: An oval pool measures 15 feet in length and 10 feet in width with an average depth of 4 feet. Using the formula: Volume = π × (Length ÷ 2) × (Width ÷ 2) × Depth = 3.14 × (15 ÷ 2) × (10 ÷ 2) × 4 = 3.14 × 7.5 × 5 × 4 = 471 cubic feet. To convert to gallons: 471 × 7.48 = 3525.48 gallons.

## Limitations

The tool assumes that all pools are filled to the specified average depth, which may not account for varying water levels due to evaporation or usage. It also does not consider irregular shapes beyond the specified forms, which may lead to inaccuracies. The precision of calculations may be limited by rounding off in the conversion processes, especially for large volumes. Users must ensure they input accurate measurements, as errors in dimensions directly impact the volume results. Additionally, the tool does not factor in features like steps or ledges that may occupy space within the pool, potentially leading to inflated volume estimates.

## FAQs

**Q:** How do you measure the average depth of a pool for accurate volume calculation?


**A:** The average depth is typically measured by taking the depth at the shallowest point and the depth at the deepest point, then averaging these two values. This provides a more accurate representation of the overall water volume.


**Q:** Can this tool provide volume calculations for irregularly shaped pools?


**A:** This tool is designed specifically for rectangular, circular, and oval pools. For irregularly shaped pools, more complex calculations and measurements are required that are not supported by this tool.


**Q:** How do I convert volume from cubic feet to gallons and liters?


**A:** To convert cubic feet to gallons, multiply by 7.48; to convert cubic feet to liters, multiply by 28.3168. These conversions are essential for standardizing volume measurements in pool maintenance.


**Q:** Why is the volume calculated based on average depth rather than total depth?


**A:** Using the average depth accounts for variations in water depth across different sections of the pool, providing a more realistic estimate of the total water volume for maintenance and chemical balancing purposes.

---

*Generated from [complete.tools/pool-volume-calculator](https://complete.tools/pool-volume-calculator)*