The image above represents crude oil gravity.

To compute for the crude oil gravity, two essential parameters are needed and these parameters are **oil density (ρ _{o}) and water density (ρ_{w}).**

The formula for calculating the crude oil gravity:

γ_{o} = ^{ρo} / _{ρw}

Where;

γ_{o} = Crude Oil Gravity

ρ_{o} = Oil Density

ρ_{w} = Water Density

Let’s solve an example;

Find the crude oil gravity when the oil density is 28 and the water density is 46.

This implies that;

ρ_{o} = Oil Density = 28

ρ_{w} = Water Density = 46

γ_{o} = ^{ρo} / _{ρw}

γ_{o} = ^{28} / _{46}

γ_{o} = 0.608

Therefore, the **crude oil density **is **0.608.**

**Calculating the Oil Density when the Crude Oil Gravity and the Water Density is Given.**

ρ_{o} = γ_{o} x ρ_{w}

Where;

ρ_{o} = Oil Density

γ_{o} = Crude Oil Gravity

ρ_{w} = Water Density

Let’s solve an example;

Find the oil density when the crude oil gravity is 30 and the water density is 16.

This implies that;

γ_{o} = Crude Oil Gravity = 30

ρ_{w} = Water Density = 16

ρ_{o} = γ_{o} x ρ_{w}

ρ_{o} = 30 x 16

ρ_{o} = 480

Therefore, the **oil density **is **480.**

**Calculating the Water Density when the Crude Oil Density and the Oil Density is Given.**

ρ_{w} = ρ_{o} / γ_{o}

Where;

ρ_{w} = Water Density

γ_{o} = Crude Oil Gravity

ρ_{o} = Oil Density

Let’s solve an example;

Find the water density when the oil density is 32 and the crude oil gravity is 12.

This implies that;

γ_{o} = Crude Oil Gravity = 12

ρ_{o} = Oil Density = 32

ρ_{w} = ^{ρo} / _{γo}

ρ_{w} = ^{32} / _{12
}ρ_{w} = 2.667

Therefore, the **water density **is **2.667.**

Nickzom Calculator – **The Calculator Encyclopedia** is capable of calculating the crude oil gravity.

To get the answer and workings of the crude oil gravity 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 **for** NGN 1,500 **per** annum** to have utter access to all functionalities.

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 **Petroleum **under **Engineering**

Now, Click on **Fluid Properties**** **under **Petroleum**

Now, Click on **Crude Oil Gravity **under **Fluid Properties**

The screenshot below displays the page or activity to enter your values, to get the answer for the crude oil gravity according to the respective parameters which are the **oil density (ρ _{o}) and water density (ρ_{w}).**

Now, enter the values appropriately and accordingly for the parameters as required by the **oil density (ρ _{o})** is

**28**

**and water density (ρ**is

_{w})**46**.

Finally, Click on Calculate

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