Pool volume calculator
Water volume, filling cost and chlorine dose for a rectangular, round or oval pool.
How it works
Rectangle: L × W × D. Round: π × (D/2)² × depth. Oval: π × L/2 × W/2 × depth. Indicative shock dose: 15 g per m³; normal level: 1 to 3 mg/L.
Results are for guidance only and do not replace professional advice.
Worked example
With the default values:
- ShapeRectangular
- Length (m)8
- Width (m)4
- Average depth (m)1.4
- Water price (per m³)5
you get:
- Water volume44.8 m³ (44,800 L)
- Filling cost€224.00
- Shock chlorine (15 g/m³)0.67 kg
- Suggested daily filtrationWater temperature / 2 in hours (e.g. 26 °C → 13 h)
Frequently asked questions
How does the “Pool volume calculator” tool work?
Rectangle: L × W × D. Round: π × (D/2)² × depth. Oval: π × L/2 × W/2 × depth. Indicative shock dose: 15 g per m³; normal level: 1 to 3 mg/L.
What do I need to enter?
Just fill in: shape, length, width, average depth, water price. The result updates as you type.
Can you give an example?
Shape: Rectangular; Length (m): 8; Width (m): 4; Average depth (m): 1.4; Water price (per m³): 5 → Water volume: 44.8 m³ (44,800 L); Filling cost: €224.00.
Is this calculator free, and is my data private?
Yes. HOD Calc is completely free with no sign-up. The calculation runs in your browser: nothing you type is sent or stored.