Pool Volume Calculator

How the Pool Volume Calculator Works

The Pool Volume Calculator is a useful tool for determining the exact amount of water in your pool based on its shape and dimensions. Whether your pool is rectangular, circular, or oval, this calculator provides accurate results in liters, gallons, and cubic meters, simplifying pool maintenance and planning.

By entering a few key measurements—such as length, width, and depth—you can quickly find out the total water volume. This data is essential for chemical dosing, saltwater system setup, heating requirements, and choosing the right filtration and pumping equipment.

Pool Volume Calculation Formulas

The calculator applies different formulas depending on the shape of the pool:

• Rectangular Pool:
  Volume = Length × Width × Average Depth

• Circular Pool:
  Volume = π × (Radius^2) × Average Depth

• Oval Pool:
  Volume = π × (Length/2) × (Width/2) × Average Depth

All measurements should be in meters to get volume in cubic meters (m³). The result is then converted into liters (1 m³ = 1,000 liters) and gallons (1 gallon ≈ 3.785 liters).

Example: Rectangular Pool Volume Calculation

Let’s say you have a rectangular pool with the following dimensions:

• Length: 5 meters

• Width: 2 meters

• Average Depth: 1.5 meters

Calculation:

5 × 2 × 1.5 = 15 m³

That equals:

• 15,000 liters

• 3,963 gallons

• Surface Area: 5 × 2 = 10 m²

This information helps you manage the pool more efficiently.

Why Knowing Pool Volume is Important

Knowing the water volume in your pool allows you to:

• Dose chemicals correctly like chlorine, algaecides, and pH balancers.

• Add the right amount of salt for saltwater chlorination systems.

• Size your pump and filter to ensure proper water circulation and hygiene.

• Plan heating more efficiently based on energy needs and desired temperature.

Quick Pool Volume Reference Table

Use this table for a quick estimate or verify with the calculator for exact values.

How much chlorine do I need weekly for my pool?

For a pool with 15,000 liters, the recommended chlorine dosage is approximately 45 to 75 grams per week, depending on usage, temperature, and exposure to sunlight. Using stabilized chlorine helps maintain levels for longer.

How do I calculate salt for a saltwater pool?

A typical saltwater system requires about 3,000 ppm of salt. For 15,000 liters, you’ll need:
15,000 × 3,000 / 1,000,000 = 45 kg of salt

Always check your system’s manual for exact salt concentration requirements.

What pump size is recommended for my pool?

For a 15,000-liter pool, a flow rate of 1,875 liters/hour is ideal. This ensures the water is completely circulated every 8 hours, which is a standard cycle for residential pools.

The Pool Volume Calculator provides the essential information you need to manage and maintain your pool efficiently, ensuring clean and balanced water all season long.