Enter the heat output and fuel input into the calculator to determine the burner efficiency.

Burner Efficiency Calculator

Output/Input
Combustion (Oâ‚‚ & Temp)
Fuel Usage & Cost

Estimate combustion efficiency from flue gas oxygen and temperatures.

Combustion Efficiency: —%
Excess Air: —%
Net Stack ΔT: —°C
CO₂ (est.): —%

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Burner Efficiency Formula

The following formula is used to calculate the burner efficiency for a given heat output and fuel input.

η = (Q / F) * 100

Variables:

  • η is the efficiency (%)
  • Q is the heat output (BTU)
  • F is the fuel input (BTU)

To calculate the burner efficiency, divide the heat output by the fuel input and multiply the result by 100 to get the percentage efficiency.

What is Burner Efficiency?

Burner efficiency is a measure of how effectively a burner converts fuel into heat. It is expressed as a percentage and indicates the proportion of the fuel’s energy that is converted into usable heat. Higher efficiency means more of the fuel’s energy is being used for heating, while lower efficiency indicates more energy is being wasted. Burner efficiency is crucial in various applications, including residential heating systems, industrial furnaces, and power generation, as it directly impacts fuel consumption and operating costs.

How to Calculate Burner Efficiency?

The following steps outline how to calculate the Burner Efficiency.


  1. First, determine the heat output (Q) in BTU.
  2. Next, determine the fuel input (F) in BTU.
  3. Finally, calculate the efficiency using the formula η = (Q / F) * 100.
  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.

Heat Output (Q) = 50000 BTU

Fuel Input (F) = 60000 BTU