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Heat Pump Savings Calculator

How much electricity and money a heat pump saves compared with electric heaters — from the heat it covers, its SCOP and your electricity price — plus the payback time.

The heat the heat pump will deliver in a year — the part of your heating it replaces.

Seasonal coefficient of performance from the data sheet. Use the colder-climate figure if you have cold winters.

Total price per kWh, including network charges and taxes.

Price of the heat pump including installation, to work out the payback time. Leave at 0 to skip.

A simple estimate against direct electric heating. Real savings depend on how much of the home the heat pump can heat, the climate, your settings and the electricity price. SCOP on the label is a seasonal average — in very cold weather the heat pump delivers less heat per kWh. Maintenance, interest and grants are not included.

About this tool

Enter how much heat the heat pump will deliver in a year, its SCOP (seasonal coefficient of performance) and your electricity price. The calculator shows how much electricity the heat pump uses for that heat, how many kWh and how much money you save compared with direct electric heating such as panel heaters, and — if you enter the installed cost — the simple payback time in years.

Frequently asked questions

SCOP is heat delivered ÷ electricity used over a heating season, and electric heaters turn almost 100% of the electricity into heat. Covering 6,000 kWh of heat with a SCOP 3.5 heat pump uses 6,000 ÷ 3.5 = 1,714 kWh instead of 6,000 kWh — 4,286 kWh (71%) less. At 0.17 per kWh that is about 729 a year.

Use the SCOP from the product data sheet. SCOP is calculated for three standard European climates — average, warmer and colder — so pick the colder figure if you live somewhere with cold winters. SINTEF’s simplified rule of thumb is that 1 kWh of electricity into a heat pump gives about 3 kWh of heat.

Only the heat it actually replaces counts — not your total electricity use, which also covers hot water, lighting and appliances. SINTEF notes that an air-to-air heat pump with one indoor unit often covers only part of the heating in homes without an open floor plan, and it does not heat tap water.

It is a simple payback: installed cost ÷ yearly saving, for example 2,500 ÷ 729 = 3.4 years. Interest, maintenance, grants and changes in electricity prices are not included, and real savings depend on how you use the heat pump. SINTEF puts typical savings at 50–80% of the electricity for the heat it covers.

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