The image above represents classifiers efficiency. To calculate classifiers efficiency, two essential parameters are needed and these parameters are **Mass of Underflow (U)** and **Mass of Feed (F).**

**The formula for calculating classifiers efficiency:**

R = ^{U}/_{F}

Where:

R = Classifier Efficiency

U = Mass of Underflow

F = Mass of Feed

Let’s solve an example;

Find the classifier efficiency when the mass of underflow is 15 and mass of feed is 3.

This implies that;

U = Mass of Underflow = 15

F = Mass of Feed = 3

R = ^{U}/_{F}

That is, R = ^{15}/_{3}

R = 5

Therefore, the **classifiers efficiency **is **5.**

**Calculating the Mass of Underflow when the Classifier Efficiency and the Mass of Feed are Given**

U = R x F

Where:

U = Mass of Underflow

R = Classifier Efficiency

F = Mass of Feed

Let’s solve an example;

Find the mass of underflow when the classifier efficiency is 20 and the mass of feed is 4.

This implies that;

R = Classifier EfficiencyÂ = 20

F = Mass of Feed = 4

U = R x F

Then, U = 20 x 4

U = 80

Therefore, the **mass of underflow **is **80.**

Read more:Â How to Calculate and Solve for Total Mass of Feed for Classifiers | Mineral Processing

**Calculating the Mass of Feed when the Classifier Efficiency and the Mass of Underflow are Given**

F = ^{U} / _{R}

Where:

F = Mass of Feed

R = Classifier Efficiency

U = Mass of Underflow

Let’s solve an example;

Find the mass of feed when the classifier efficiency is 8 and the mass of underflow is 32.

This implies that;

R = Classifier Efficiency = 8

U = Mass of Underflow = 32

F = ^{U} / _{R}

That is, F = ^{32} / _{8}

F = 4

Therefore, the **mass of feed **is **4.**

**How to Calculate Classifiers Efficiency Using Nickzom Calculator**

Nickzom Calculator â€“Â **The Calculator Encyclopedia** is capable of calculating the classifier efficiency.

To get the answer and workings of the classifiers efficiency using the **Nickzom Calculator â€“ The Calculator Encyclopedia.Â **First, you need to obtain the app.

You can get this app via any of these means:

**Web**Â â€“Â https://www.nickzom.org/calculator-plus

To get access to theÂ **professionalÂ **version via web, you need toÂ **register**Â andÂ **subscribe **to have utter access to all functionalities.

You can also try theÂ **demoÂ **version viaÂ https://www.nickzom.org/calculator

**Android (Paid)**Â â€“Â https://play.google.com/store/apps/details?id=org.nickzom.nickzomcalculator

**Android (Free)**Â â€“Â https://play.google.com/store/apps/details?id=com.nickzom.nickzomcalculator

**Apple (Paid)**Â â€“Â https://itunes.apple.com/us/app/nickzom-calculator/id1331162702?mt=8

Once, you have obtained the calculator encyclopedia app, proceed to theÂ **Calculator Map,Â **then click onÂ **Materials and MetallurgicalÂ **underÂ **Engineering****.**

Now, Click on **Mineral Processing **underÂ **Materials and Metallurgical**

Now, Click on **Classifiers Efficiency** under **Mineral Processing**

The screenshot below displays the page or activity to enter your values, to get the answer for the classifiers efficiency according to the respective parameter which is the **Mass of Underflow (U)** and **Mass of Feed (F).**

Now, enter the values appropriately and accordingly for the parameters as required by the **Mass of Underflow (U)Â **isÂ **15** and **Mass of Feed (F)** is **3**.

Finally, Click on Calculate

As you can see fromÂ the screenshot above,Â **Nickzom Calculator**â€“ The Calculator Encyclopedia solves for the classifiers efficiency and presents the formula, workings and steps too.