kW Per Ton Calculator

Calculate HVAC cooling efficiency by measuring kilowatts per ton. This metric helps evaluate chiller performance, air conditioner efficiency, and overall cooling system effectiveness.

HVAC Efficiency Calculator:

Calculate kW per ton, COP, and EER for any cooling system. Lower kW/Ton means better efficiency. Ideal for HVAC technicians, engineers, and facility managers.

kW Per Ton Calculator

Mode

Power consumption of the cooling system

Cooling output capacity

Efficiency Results

Enter power and cooling capacity

then click "Calculate" for efficiency

kW Per Ton Calculator

kW per ton tells you how much electrical power a cooling system uses for each ton of cooling it produces. It's a straightforward way to compare efficiency between different chillers, air conditioners, and refrigeration units.

Quick Reference

Lower kW/Ton means better efficiency. A typical chiller runs at 0.5-0.8 kW/Ton. Older systems might run 1.2-1.5 kW/Ton or higher. Upgrading equipment can cut energy costs significantly.

What is kW Per Ton?

A "ton" of cooling equals 12,000 BTU per hour — roughly the amount of heat needed to melt one ton of ice in 24 hours. When we say a system uses 1 kW per ton, it means the equipment consumes 1 kilowatt of electricity to deliver that ton of cooling capacity.

This ratio matters because it directly impacts operating costs. A system running at 0.6 kW/Ton costs half as much to operate as one running at 1.2 kW/Ton, assuming the same cooling output.

Formulas Used

kW Per Ton Formula
kW/Ton = Power Consumption (kW) ÷ Cooling Capacity (Tons)
Example: 10 kW ÷ 5 Tons = 2.0 kW/Ton
COP (Coefficient of Performance)
COP = 3.517 ÷ kW/Ton
Higher COP = Better efficiency. COP above 4.0 is considered good.
EER (Energy Efficiency Ratio)
EER = 12 ÷ kW/Ton
EER measures BTU per watt-hour. Higher is better.

How to Use This Calculator

  1. Enter the power consumption of your cooling system
  2. Select the correct unit (kW, Watts, or HP)
  3. Enter the cooling capacity in Tons, BTU/hr, or kW
  4. Click Calculate to see efficiency ratings
  5. Use Advanced Options for energy cost calculations

kW Per Ton Reference Table

This table shows efficiency ratings for various cooling system configurations:

Power (kW) Cooling (Ton) kW/Ton COP EER Rating
2 kW 1 Ton 2.00 1.76 6.0 Poor
3.5 kW 2 Ton 1.75 2.01 6.9 Poor
5 kW 5 Ton 1.00 3.52 12.0 Average
7.5 kW 10 Ton 0.75 4.69 16.0 Good
10 kW 10 Ton 1.00 3.52 12.0 Average
12 kW 20 Ton 0.60 5.86 20.0 Excellent
15 kW 15 Ton 1.00 3.52 12.0 Average
20 kW 30 Ton 0.67 5.26 18.0 Good
25 kW 25 Ton 1.00 3.52 12.0 Average
30 kW 50 Ton 0.60 5.86 20.0 Excellent
35 kW 40 Ton 0.88 4.01 13.7 Good
40 kW 60 Ton 0.67 5.26 18.0 Good
50 kW 70 Ton 0.71 4.95 16.9 Good
60 kW 80 Ton 0.75 4.69 16.0 Good
70 kW 100 Ton 0.70 5.02 17.1 Good
80 kW 120 Ton 0.67 5.26 18.0 Good
100 kW 150 Ton 0.67 5.26 18.0 Good
120 kW 200 Ton 0.60 5.86 20.0 Excellent
150 kW 250 Ton 0.60 5.86 20.0 Excellent
200 kW 300 Ton 0.67 5.26 18.0 Good
250 kW 400 Ton 0.63 5.60 19.1 Excellent
Tip:

Results are saved automatically in your browser. They'll stay visible until you click the Clear button, so you can compare different scenarios without losing your calculations.