Air-conditioner running-cost calculator

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From electricity use to cost.

Choose your energy source

Electrical input powerPower unit

Use time per use dayTime unit

Use days in your chosen periodChoose a month, season or other period. Only the entered number of use days is counted.

CurrencyYour price per kWh

Illustrative inputs. Replace them with your appliance and tariff. Currency changes formatting only.

Estimated electricity cost

$90.00

for 90 entered use days

Energy in this period: 450 kWh
Cost per use day: $1.00
Energy per use day: 5 kWh
Cost per hour at entered power: $0.20

Your rate, your estimate

This assumes the entered electrical power is drawn throughout the entered use time. A nameplate rating may overstate average use when an appliance cycles.

How we calculate this

1 kW × 5 hours × 90 days = 450 kWh. × $0.20 per kWh = $90.00.

Measured mode divides the measured kWh by complete measurement days, then multiplies by your use days. Electricity only, at a constant entered rate. Fixed charges and other household costs are excluded.

Understand watts, time and cost

Before you calculate

Use electrical input watts. BTU/h and cooling-capacity kW describe heat transfer and must not be entered as electrical power.
Compressor cycling and variable-speed operation affect average use. Power mode holds the entered draw constant; measured mode includes the operation captured in your sample.
Enter only the cooling use days for your chosen month or season. Indoor/outdoor conditions and installation can change consumption.
Annual-label mode prices the stated annual kWh directly. Select cooling or heating and the matching climate; the figure is not rescaled to your household hours.
Check whether your label states annual or hourly consumption. US CEER and EU SEER/SCOP are efficiency metrics, not direct household kWh.
This is a cost estimate, not cooling-system sizing or installation advice.

Replace every sample figure with one appropriate to your appliance and household.

Sources and product documents

Reading Municipal Light Department: Electricity use and bill calculationsReference checked 2026-10-01
European Commission: Air-conditioner labels and comfort fansReference checked 2026-10-01
ENERGY STAR: Room air-conditioner metrics and operationReference checked 2026-10-01

From electricity use to cost.

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