The image above represents gravity anomaly for a semi-infinite horizontal sheet. To calculate gravity anomaly for a semi-infinite horizontal sheet, five essential parameters are needed and these parameters are **Gravitational Constant (G), Anomalous Density (Δρ), Thickness of the Sheet (t), ****Horizontal Distance (x)** and** Depth Buried (d).**

**The formula for calculating gravity anomaly for a semi-infinite horizontal sheet:**

δg_{z} = 2GΔρt [^{π}/_{2} + tan^{-1}(^{x}/_{d})]

Where:

δg_{z} = Gravity Anomaly for a Semi-Infinite Horizontal Sheet

G = Gravitational Constant

Δρ = Anomalous Density

t = Thickness of the Sheet

x = Horizontal Distance

d = Depth Buried

Let’s solve an example;

Find the gravity anomaly for a semi-infinite horizontal sheet when the gravitational constant is 6.67E-11, the anomalous density is 12, the thickness of the sheet is 14, the horizontal distance is 18 and the depth buried is 5.

This implies that;

G = Gravitational Constant = 6.67E-11

Δρ = Anomalous Density = 12

t = Thickness of the Sheet = 14

x = Horizontal Distance = 18

d = Depth Buried = 5

δg_{z} = 2GΔρt [^{π}/_{2} + tan^{-1}(^{x}/_{d})]

That is, δg_{z} = 2(6.67e-11)(12)(14) [^{π}/_{2} + tan^{-1}(^{18}/_{5})]

δg_{z} = 2.2411200000000002e-8 [1.570 + tan^{-1}(3.6)]

δg_{z} = 2.2411200000000002e-8 [1.570 + 74.475]

Then, δg_{z} = 2.2411200000000002e-8 [76.046]

δg_{z} = 0.000001704

Therefore, the **gravity anomaly for a semi-infinite horizontal sheet** is **0.000001704 mGal.**

Read more: How to Calculate and Solve for Gravity Anomaly for an Infinitely Long Cylinder | Gravity

**How to Calculate Gravity Anomaly for a Semi-Infinite Horizontal Sheet Using Nickzom Calculator**

Nickzom Calculator – **The Calculator Encyclopedia** is capable of calculating the gravity anomaly for a semi-infinite horizontal sheet.

To get the answer and workings of the gravity anomaly for a semi-infinite horizontal sheet 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

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

**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 **Geology**** **under **Add-on****.**

Now, Click on **Gravity **under **Geology**

Now, Click on **gravity anomaly for a semi-infinite horizontal sheet **under **Gravity**

The screenshot below displays the page or activity to enter your values, to get the answer for the gravity anomaly for a semi-infinite horizontal sheet according to the respective parameters which are the **Gravitational Constant (G), Anomalous Density (Δρ), Thickness of the Sheet (t), ****Horizontal Distance (x)** and** Depth Buried (d).**

Now, enter the values appropriately and accordingly for the parameters as required by the **Gravitational Constant (G)** is **6.67E-11**,** Anomalous Density (Δρ)** is **12**,** Thickness of the Sheet (t)** is **14**, **Horizontal Distance (x)** is **18** and** Depth Buried (d)** is **5**.

Finally, Click on Calculate

As you can see from the screenshot above, **Nickzom Calculator**– The Calculator Encyclopedia solves for the gravity anomaly for a semi-infinite horizontal sheet and presents the formula, workings and steps too.