Enter the total flow rate, total tons of cooling, and Gpm per ton into the calculator to determine the missing variable.

Gpm Per Ton Calculator

Enter your chiller load to get the required flow rate.

Tons → GPM
GPM → Tons

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Gpm Per Ton Formula

The following formula is used to calculate the Gpm per ton for a given total flow rate and total tons of cooling.

G = \frac{Q}{T}

Variables:

  • G is the Gpm per ton
  • Q is the total flow rate in gallons per minute (Gpm)
  • T is the total tons of cooling

To calculate the Gpm per ton, divide the total flow rate by the total tons of cooling.

What is Gpm Per Ton?

Gpm per ton is a measure used in HVAC (Heating, Ventilation, and Air Conditioning) systems to determine the flow rate of water required per ton of cooling. This metric helps in designing and evaluating the efficiency of cooling systems. One ton of cooling is equivalent to the amount of heat required to melt one ton (2000 pounds) of ice in a 24-hour period, which is approximately 12,000 BTUs per hour. The Gpm per ton value is crucial for ensuring that the cooling system operates efficiently and effectively, providing the necessary cooling capacity without overloading the system.

How to Calculate Gpm Per Ton?

The following steps outline how to calculate the Gpm per ton.


  1. First, determine the total flow rate (Q) in gallons per minute (Gpm).
  2. Next, determine the total tons of cooling (T).
  3. Finally, calculate the Gpm per ton using the formula G = Q / T.
  4. After inserting the values and calculating the result, check your answer with the calculator above.

Example Problem : 

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

Total flow rate (Q) = 300 Gpm

Total tons of cooling (T) = 100