The image above represents theoretical value of g. To calculate theoretical value of g, one essential parameter is needed and this parameter is **Latitude (Ï†).**

The formula for calculating theoretical value of g:

g = (-172 + 136sinÂ²Ï†)

Where:

g = Theoretical Value of g | Standard Formula

Ï† = Latitude

Let’s solve an example;

Find the theoretical value of g when the latitude is 18.

This implies that;

Ï† = Latitude = 18

g = (-172 + 136sinÂ²Ï†)

That is, g = (-172 + 136sinÂ²(18))

g = (-172 + 136(0.309)Â²)

g = (-172 + 136(0.0954))

Then, g = (-172 + (12.986))

g = -159.01

Therefore, theÂ **theoretical value of gÂ **isÂ **-159.01 mGal.**

Read more:Â How to Calculate and Solve for Total Mass Determination | Gravity

**How to Calculate Theoretical Value of g | Standard Formula Using Nickzom Calculator**

Nickzom Calculator â€“Â **The Calculator Encyclopedia** is capable of calculating the theoretical value of g.

To get the answer and workings of the theoretical value of g 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:

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**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 **subscribeÂ **for**Â NGN 2,000Â **per**Â annum**Â 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 **Geology****Â **underÂ **Add-on****.**

Now, Click onÂ **GravityÂ **under **Geology**

Now, Click onÂ **Theoretical Value of g** under **Gravity**

The screenshot below displays the page or activity to enter your value, to get the answer for the theoretical value of g according to the respective parameter which is the **Latitude (Ï†)****.**

Now, enter the value appropriately and accordingly for the parameter as required by the **Latitude (Ï†)** is **18**.

How to Calculate and Solve for Theoretical Value of g | Standard Formula | Gravity

Finally, Click on Calculate

As you can see from the screenshot above,Â **Nickzom Calculator**â€“ The Calculator Encyclopedia solves for the theroretical value of g and presents the formula, workings and steps too.