Enter the concentration of CO2 (ppmv) and the concentration of CO (ppmv) into the calculator to determine the Combustion Efficiency.

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## Combustion Efficiency Formula

The following formula is used to calculate the Combustion Efficiency.

**Ecombustion = CO2 / (CO2 + CO) *100**

- Where Ecombustion is the Combustion Efficiency (%)
- CO2 is the concentration of CO2 (ppmv)
- CO is the concentration of CO (ppmv)

## How to Calculate Combustion Efficiency?

The following two example problems outline how to calculate the Combustion Efficiency.

**Example Problem #1:**

- First, determine the concentration of CO2 (ppmv). In this example, the concentration of CO2 (ppmv) is given as 10.
- Next, determine the concentration of CO (ppmv). For this problem, the concentration of CO (ppmv) is given as 2.
- Finally, calculate the Combustion Efficiency using the equation above:

Ecombustion = CO2 / (CO2 + CO) *100

Inserting the values from above and solving the equation:

Ecombustion = 10 / (10 + 2) *100 = 83.33 (%)

**Example Problem #2: **

Using the same process as above, first define the variables required by the formula. In this case, these values are:

concentration of CO2 (ppmv) = 8

concentration of CO (ppmv) = 3

Entering these values yields:

Ecombustion = 8 / (8 + 3) *100 = 72.72 (%)