Air Conditioner Electricity Cost Calculator

Estimate the electricity cost of a room or window air conditioner using average operating power and realistic daily runtime.

Average power while operating (watts)

Average operating hours per day

Electricity price ($/kWh)

Energy/day—

Cost/day—

Cost/month—

Cost/year—

Default inputs are examples, not claims about every product. Replace them with measured or manufacturer-specific values.

Formula

Daily kWh = watts ÷ 1,000 × operating hours
Daily cost = daily kWh × electricity rate.

What makes the estimate more accurate?

Air conditioners cycle with thermostat demand. Outdoor temperature, room heat gain, insulation, setpoint and equipment efficiency all affect runtime. If you have measured kWh from a smart plug or submeter, use that instead of assuming the compressor runs continuously.

Related calculators

Air Conditioner Installation Cost and Electricity Cost Calculator.

Data note: Electricity prices vary by location and tariff. The default $0.173/kWh is a U.S. residential reference; use your actual utility rate for decision-making. See sources.

Estimate only. Actual energy use depends on equipment, controls, climate and user behavior.