Enter the number of samples produced by a full STR and the total number of samples processed into the Extraction Efficiency Calculator. The calculator will evaluate the Extraction Efficiency.

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## Extraction Efficiency Formula

The following two example problems outline the steps and information needed to calculate the Extraction Efficiency.

EE = STR / SP *100

Variables:

- EE is the Extraction Efficiency (%)
- STR is the number of samples produced by a full STR
- SP is the total number of samples processed

To calculate the extraction efficiency, divide the number of samples produced by a full STR by the total number of samples processed, then multiply by 100.

## How to Calculate Extraction Efficiency?

The following steps outline how to calculate the Extraction Efficiency.

- First, determine the number of samples produced by a full STR.
- Next, determine the total number of samples processed.
- Next, gather the formula from above = EE = #STR / #SP *100.
- Finally, calculate the Extraction Efficiency.
- After inserting the variables 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.

number of samples produced by a full STR = 500

total number of samples processed = 600

EE = #STR / #SP *100** **= ?