Mini-split operating cost calculator

Estimate cooling and heating electricity cost from published efficiency ratings and your usage assumptions.

Operating assumptions

This is an energy-use estimate for comparing assumptions, not a utility bill forecast. Actual bills depend on weather, thermostat settings, building load, cycling, defrost, backup heat, installation quality, and utility rate structure.

State rateResidential cents/kWh from EIA, April 2026.System capacityRated capacity in BTU/h.SEER2Cooling seasonal efficiency.HSPF2Heating seasonal efficiency.Electricity rateArizona seeded rate; edit if your utility rate differs.Cooling hoursEstimated annual cooling-mode hours.Heating hoursEstimated annual heating-mode hours.Climate zoneUsed to label the estimate context.

Selected rate: Arizona residential 15.48 c/kWh (EIA, April 2026).

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