The loss on ignition is illustrated by the image below. Two essential parameters are needed to calculate the loss on ignition: weight before firing (m1) and weight after firing**Â (m _{2}).**

**The formula to calculate loss on ignition:**

LOI = 100(^{(m1Â – m2)}/m_{1})

Where:

LOI = Loss On Ignition

m_{1}Â = Weight before Firing

m_{2}Â = Weight after Firing

Let’s solve an example;

Find the loss on ignition when the weight before firing is 22 and the weight after firing is 11.

This implies that;

m_{1} = Weight before Firing = 22

m_{2} = Weight after Firing = 11

LOI = 100(^{(m1Â – m2)}/m_{1})

LOI = 100(^{(22 – 11)}/_{22})

So, LOI = 100(^{11}/_{22})

LOI = 100(0.5)

LOI = 50

Therefore, theÂ **loss on ignitionÂ **isÂ **50%.**

Read more:Â How to Calculate and Solve for Permeability Number | Refractories

**How to Calculate Loss on Ignition With Nickzom Calculator**

Nickzom Calculator â€“Â **The Calculator Encyclopedia** is capable of calculating the loss on ignition.

To get the answer and workings of the loss on ignition 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

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To get access to theÂ **professionalÂ **version via web, you need toÂ **register**Â andÂ **subscribeÂ **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 **Refractories****Â **underÂ **Materials and Metallurgical**

Now, Click onÂ **Loss on Ignition**Â under **Refractories**

The screenshot below displays the page or activity to enter your values, to get the answer for the loss on ignition according to the respective parameter which is the **Weight before Firing (m _{1})** and

**Weight after Firing (m**

_{2}).Now, enter the values appropriately and accordingly for the parameters as required by the **Weight before Firing (m _{1})Â **isÂ

**22**and

**Weight after Firing (m**is

_{2})**11**.

Finally, Click on Calculate

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