Enter the Energy Efficiency Ratio (EER) and the Cooling Capacity in BTU/hr into the calculator to convert EER to kW per ton of cooling capacity. This calculator helps in determining the efficiency of air conditioning systems.

EER to kW Ton Formula

The following formula is used to convert EER to kW per ton of cooling capacity:

kW/Ton = (12 / EER) * (Cooling Capacity / 12000)


  • kW/Ton is the power usage in kilowatts for each ton of cooling capacity.
  • EER is the Energy Efficiency Ratio, which is the ratio of the cooling capacity (in BTU/hr) to the power input (in watts).
  • Cooling Capacity is the amount of heat removed by the air conditioning system (in BTU/hr).

To convert EER to kW per ton, divide 12 by the EER, then multiply the result by the cooling capacity divided by 12,000.

What is EER?

Energy Efficiency Ratio (EER) is a measure of how efficiently a cooling system operates when the outdoor temperature is at a specific level (usually 95°F). A higher EER rating indicates a more efficient air conditioning system. EER is calculated by dividing the cooling capacity in British Thermal Units (BTU) per hour by the power input in watts.

How to Calculate kW/Ton from EER?

The following steps outline how to calculate kW per ton from EER.

  1. First, determine the Energy Efficiency Ratio (EER) of the air conditioning system.
  2. Next, determine the cooling capacity of the system in BTU/hr.
  3. Use the formula above to calculate the kW per ton: kW/Ton = (12 / EER) * (Cooling Capacity / 12000).
  4. Finally, enter the EER and cooling capacity into the calculator to get the kW per ton value.

Example Problem :

Use the following variables as an example problem to test your knowledge.

Energy Efficiency Ratio (EER) = 10

Cooling Capacity = 24000 BTU/hr