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BTU Calculator & BTU Formulas

A BTU is an abbreviation for British Thermal Unit, which is the amount of energy required to raise 1 pound of water 1 degree Fahrenheit at sea level. A BTU is a relatively small amount of energy... about equivalent to the heat generated by striking 1 stick match.

You can calculate BTU heating or cooling requirements for your process by understanding your application. Some common BTU calculating formulas are shown below.

Weighed Water Test:
Measure the flow of water through your process by timing how long it takes to fill a known volumne container. For example, allow your process water to fill a 5-gallon container. Accurately meaure the water temperature entering and exiting your process. Use this formula to calculate BTU cooling required:

BTU = Flow Rate In GPM x (Temperature Leaving Process - Temperature Entering Process) x 500

BTU Calculator for Weighed Water Test

  • GPM
  • Water Flow Rate In Gallons Per Minute
  • °F
  • Inlet Water Temperature Of Process
  • °F
  • Outlet Water Temperature Of Process
  • Submit
  • Clear

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