Pool Running Cost Calculator

For a medium in-ground pool (about 50 m³) the running cost of one season in Italy ranges from a few hundred to over a thousand euros, depending on tariffs and use. The main items are the pump electricity, the initial fill and top-ups, and the chemicals. Water heating, if present, can easily double the cost.

A domestic pump typically has a power between 550 and 1,100 W. Consumption is calculated as: (power in kW) × hours per day × days × price €/kWh. E.g.: a 750 W (0.75 kW) pump run 8 hours a day for 120 days at €0.28/kWh uses 0.75 × 8 × 120 = 720 kWh, about €201. It is the item that weighs the most on running costs.

Water is counted in cubic metres (1 m³ = 1,000 litres) and equals the pool volume. The cost of filling is volume × number of fill-ups × price €/m³. E.g.: 50 m³ × 1 fill × €2.2/m³ = €110. Bear in mind that mains water is often billed on a progressive tiered tariff, so a large fill can fall into the more expensive tiers of the bill.

The three most effective measures are: using a cover to cut evaporation, heat loss and chemical use; optimising the pump with a timer and reducing filtering hours (or switching to a variable-speed pump, which can cut up to 70% of the energy); and keeping the water always well balanced, because balanced water needs fewer chemicals and corrections. Fixing leaks promptly and wintering correctly also make a difference.

Yes: a cover is one of the most profitable investments. It drastically reduces evaporation (the main cause of water and heat loss), limits leaves and dirt getting in, and keeps the water chemistry more stable. The result: less water for top-ups, fewer chemicals and, if you heat the water, far less gas or electricity. A bubble (solar) cover is cheap and pays for itself in one or two seasons.

Heating is the most variable item and this calculator does not include it. It depends on the system (heat pump, gas boiler, heat exchanger or solar panels), the temperature rise you want and the climate. A heat pump is usually the cheapest to run; solar panels have almost no running cost but variable output. In any case, using the cover when the pool is not in use greatly reduces losses and therefore the heating cost.

The rule of thumb is to filter all the water at least once or twice a day: in summer many aim for 8-12 hours a day, spread over the cooler hours, while in the milder seasons 4-6 hours is enough. The exact time depends on the pump flow rate, the volume and how the pool is used. A timer or a variable-speed pump lets you filter for longer at low power, cutting consumption without sacrificing water quality.

For a medium in ground pool of about 50 cubic metres a season runs from a few hundred to over a thousand euro, depending on tariffs and use. The main items are pump electricity, the first fill and the chemicals.

A domestic pump draws between 550 and 1,100 watts. A 750 watt pump run eight hours a day for 120 days at 0.28 euro per kWh uses 720 kWh, which comes to about 200 euro over the season.

Water is counted in cubic metres, one of which is a thousand litres, and the amount equals the volume of the pool. Fifty cubic metres at 2.2 euro each comes to 110 euro, and mains water is often billed with sewerage on top.

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