Heat Pump Running Cost Calculator
Estimate annual heat-pump electricity use from delivered heat and seasonal COP, then compare it with gas heating.
Heat Pump Running Cost Calculator
Heat-pump electricity—
Heat-pump cost—
Gas heating cost—
Difference—
Heat pump operating-cost formula
Electricity use = Delivered heat ÷ Seasonal COP
A seasonal COP is more useful than a single laboratory COP because real efficiency changes with outdoor temperature, supply temperature, controls and defrost cycles.
Frequently asked questions
What COP should I use?
Use a seasonal performance value from a trusted design estimate or field data when available. A single rated COP may overstate real seasonal performance.
Why can backup heat change the result?
Electric resistance backup has a COP near 1, so frequent backup operation can raise annual electricity use significantly.
Estimates only. Actual energy use and costs vary by equipment, climate, tariffs, installation conditions and user behavior.