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Appliance

Air Conditioner Energy Cost Calculator

Estimate monthly AC electricity cost from watts, daily hours, and rate.

AC power drawW

Hours per dayhrs

Daysdays

Rate$/kWh

Estimated cost

Enter watts, hours, days & rate

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About Air Conditioner Energy Cost Calculator

AC cost formula

Monthly cost = (watts × hours/day × days ÷ 1,000) × $/kWh. Duty cycle varies—use average watts if the compressor cycles.

SEER and sizing

Oversized or inefficient units cost more. Compare SEER ratings when replacing equipment.

Frequently asked questions

Q: Should I use rated BTU? A: Use measured or estimated watts; BTU/h ÷ 3.412 ≈ watts for rough conversion.

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