The resistivity is illustrated by the image below. Three essential parameters are needed to calculate resistivity: cross-sectional area (A), length (l), and resistance** (R).**

**The formula for calculating the resistivity:**

ρ = ^{RA}/_{l}

Where:

ρ = resistivity

R = Resistance

A = Cross-sectional Area

l = Length

Let’s solve an example;

Find the resistivity when the resistance is 10, the cross-sectional area is 4 and the length is 2.

This implies that;

R = Resistance = 10

A = Cross-sectional Area = 4

l = Length = 2

ρ = ^{RA}/_{l}

So, ρ = ^{(2)(10)}/_{4}

ρ = ^{(20)}/_{4}

ρ = 5

Therefore, the **resistivity **is **5Ω-m.**

Read more: How to Calculate and Solve for Resistance | Electric Resistivity

**How to Calculate Resistivity Using Nickzom Calculator**

Nickzom Calculator – **The Calculator Encyclopedia** is capable of calculating the resistivity.

To get the answer and workings of the resistivity using the **Nickzom Calculator – The Calculator Encyclopedia. **First, you need to obtain the app.

You can get this app via any of these means:

**Web** – https://www.nickzom.org/calculator-plus

To get access to the **professional **version via web, you need to **register** and **subscribe **to have utter access to all functionalities.

You can also try the **demo **version via https://www.nickzom.org/calculator

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

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

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

Once, you have obtained the calculator encyclopedia app, proceed to the **Calculator Map, **then click on **Materials and Metallurgical **under **Engineering****.**

Now, Click on **Electrical Properities**** **under **Materials and Metallurgical**

Then, Click on **Electrical ****Resistivity** under **Electrical Properities**

Now, Click on **Resistivity **under **Electrical Resistivity**

The screenshot below displays the page or activity to enter your values, to get the answer for the resistivity according to the respective parameter which is the **Cross-sectional Area (A), Length (l)** and** Resistance (R).**

Now, enter the values appropriately and accordingly for the parameters as required by the **Cross-sectional Area (A)** is **10**,** Length (l) **is **4** and** Resistance (R)** is **2**.

Finally, Click on Calculate

As you can see from the screenshot above, **Nickzom Calculator**– The Calculator Encyclopedia solves for the resistivity and presents the formula, workings and steps too.