How to calculate air conditioner wattage

To calculate the wattage of an air conditioner using alternating current (AC), the formula is slightly different. The basic formula for AC power is:

Wattage (W) = Voltage (V) × Current (A) × Power Factor (PF)

In this case:

• Voltage (V) is the electrical voltage supplied to the unit (typically 120V or 240V).
• Current (A) is the amount of current the unit draws.
• Power Factor (PF) is a value that accounts for the inefficiency in the system, usually between 0 and 1 (often around 0.9 for air conditioners).

For a rough estimate, you can also calculate the energy consumption by dividing the cooling capacity (in BTU) by 3.412. This gives you an estimate of the power the unit will use during operation. Always refer to the manufacturer’s specifications for precise details.

With our calculator, you can quickly calculate electrical power consumption and your bill payment.

The SEER Performance Table allows users to understand the energy consumption of the unit, enabling comparisons between different models and brands.

The SEER (Seasonal Energy Efficiency Ratio) indicates the average electrical power consumption of the unit under various working conditions. The formula to calculate SEER is:

Electrical Power (Watt) = Cooling Capacity (Btu/hour) / SEER Value

Here is a typical SEER table for air conditioners:

Table 1: SEER Value by Air Conditioner Rating

Here is a table showing the average residential electricity prices per kilowatt-hour (kWh) in ten English-speaking countries as of March 2024:

Note: Prices are approximate and may vary based on specific regions within each country.

Please note that electricity prices can fluctuate due to factors such as energy production methods, government policies, and market conditions.

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