# Diameter Calculator

Diameter Calculator is a free online tool which helps you to calculate the diameter of a circle with the help of the other dimensions.

## What is a Diameter Calculator?

In Cuemath's diameter calculator, enter the values for the area, radius or circumference and get the length of the diameter within a few seconds.

Note: Enter up to 4 digits.

## How to Use the Diameter Calculator?

Follow the steps mentioned below to find the diameter of a circle.

**Step 1:**Select the option from the drop-down menu to enter the input value for the radius, area, or circumference.**Step 2:**Enter the value for the option that you chose in the first step and click on "**Calculate**" to find the diameter of the circle.**Step 3:**Click on "**Reset**" to clear the fields and enter the new value.

## How to Calculate Diameter?

The diameter of a circle is a straight line joining a point from one end of the circle to a point on the other end of the circle, passing through the center. The size of the circle changes when the length of the diameter varies.The diameter of a circle can be calculated if the radius is known. The formula for the diameter of a circle when the radius is known is: **Diameter =** **Radius × 2**

The formula for the diameter of a circle when its circumference is known is: **Diameter = Circumference / п**

The formula for the diameter of a circle when the area is known is: **Diameter = 2 × ⎷(Area of Circle / п)**

We substitute the values in the given formulas to find the diameter. Let us learn more with the help of the following example.

**Solved Example:**

If the Circumference of a circle is 14 inches, what is the length of its diameter?

**Solution:**

Circumference = 14 inches; we know that: Diameter = Circumference / п

= (14/3.14) inches

= 4.459 inches

Now, try the calculator to find the diameter of a circle for the following dimensions:

- Find the diameter of a circle whose area is 16 unit
^{2}. - Find the diameter of a circle whose radius is 8 units.
- Find the diameter of a circle whose circumference is 46 units.