If you need to solve some geometry exercises, this circumference calculator is the right page for you. It is a tool created specifically to find the diameter, circumference and area of any circle. Read to learn:

- What is the definition of circumference?
- How to find the circumference of a circle.
- How to convert circumference to diameter

As with all our tools, the circumference calculator works in all directions; It is also a circumference to diameter calculator and can be used to convert circumference to radius, circumference to area, radius to circumference, radius to diameter (duh!), radius to area, diameter to circumference, diameter to radius (yes, again with rocket science), diameter to area, area to circumference, area to diameter, or area to radius.

If you want to draw a circle on the cartesian plane you can find thisequation of a circular calculatoruseful.

## circumference definition

The circumference of a circle is the linear distance from the edge of a circle. It is the same as the perimeter of a geometric figure, but the term 'perimeter' is used exclusively for polygons.

The circumference is often incorrectly written as*circumference*.

## circumference formula

The following equation describes the relationship between circumference and radius.`R`

of a circle:

`C = 2πR`

Where π is a constant approximately equal to 3.14159265...

💡**It is impossible to find the exact value of π.**It's an irrational number, so we usually use approximations like 3.14 or 22/7. If you are interested in this topic, go ahead and take a look atfirst million digits of π.

An equally simple formula determines the ratio of the area of acircleand its radius:

`A = π * R²`

## How to find the circumference of a circle.

- Determine the radius of a circle. Assume it equals 14 cm.
- Substitute this value for the circumference formula:
`C = 2 * π * R = 2 * π * 14 = 87,9646 cm`

. - You can also use it to find the area of a circle:
`A = π * R² = π * 14² = 615.752 cm²`

. - Finally, you can find the diameter, it's simply twice the radius:
`D = 2 * R = 2 * 14 = 28 cm`

. - Use our circumference calculator to find the radius when you only have the circumference or area of a circle.

Circumference calculation is important for determining hoop stress in any rotationally symmetric object. Learn more with ourrim tension calculator.

## circumference to diameter

You've probably noticed that since the diameter is twice the radius, the ratio of the circumference to the diameter equals π:

`C/D = 2πR / 2R = π`

This ratio (circumference to diameter) is the definition of the constant pi. It is used in many areas such as physics and mathematics. For example, you can find it atcentrifugal force calculator.

🔎 If you are interested in the relationship between circumference and other variables, you can take a look at ourcircumference to diameterycircumference and area of a circlecalculators

## frequently asked questions

### How to find the circumference of a circle?

To calculate the circumference, you**I need the radius of the circle**:

**Multiply**the radius times 2 to get the diameter.**Multiply**the result times π, or 3.14 for an estimate.- That's it; you found the
**circle circumference**.

or you can use**the diameter of the circle**:

**Multiply**el diameter by π, or 3.14.- The result is the
**circle circumference**.

### What is the circumference of a circle?

the circumference of a circle is**the linear distance from the edge of the circle**. is equivalent to**perimeter**geometric shape, although the term perimeter is only used for polygons.

### Who first calculated the circumference of the earth?

Him**The first person to calculate the Earth's circumference was Eratosthenes, a Greek mathematician.**, in 240 B.C. He found that objects in a city in the northern tropics do not cast a shadow at midday on the summer solstice, but cast a shadow at a location farther north. Knowing this and the distance between places, he was able to calculate the circumference of the Earth.

### How do I find the diameter from the circumference?

If you want**find the diameter of the circumference of a circle**, Follow these steps:

**Share**circumference times π, or 3.14 for an estimate.- And that is;
**Do you have the diameter of the circle?**.

### How to get the area of a circle from the circumference?

AN**find the area of a circle from the circumference**, Follow these steps:

**Share**the circumference by π**Share**the result times 2 to get the**circle radius**.**Multiply**the radius by itself to get your square.**Multiply**squared by π, or 3.14 for an estimate.- you found the
**circle area from circumference**.

### How do I find the radius of the circle?

AN**find the radius of the circumference of a circle**, you must do the following:

**Share**circumference times π, or 3.14 for an estimate. The result is the diameter of the circle.**Share**the diameter by 2.- Here it is,
**Did you find the radius of the circle?**.

### How to measure the circumference?

- Calculate the circumference as
**2 ⨉ radio ⨉ p**. - Calculate the circumference as
**diameter ⨉ π**. - wrap a
**rope around object**and measure its length. - Use
**omni circumference calculator**.

### What is the circumference formula?

Him**circumference formula**, if the radius of the circle is given, it is:

**2 ⨉ radio ⨉ p**

Or if the circumference of the circle is given:

**Circumference ⨉ π**

You can estimate π as 3.14.

### What is the circumference of a circle with a radius of 1 meter?

AN**Calculate the circumference of a circle with a radius of 1 meter**, just follow these steps:

**Multiply**the radius times 2 to get the diameter of 2 meters.**Multiply**the result times π, or 3.14 for an estimate.- And there you go; The
**The circumference of a circle with a radius of 1 meter is 6.28 meters**.

### How do I find the circumference of a cylinder?

AN**find the circumference of a cylinder**, you should keep in mind that the cross section of a cylinder is a circle. If you know the radius of the cylinder:

**Multiply**the radius times 2 to get the diameter.**Multiply**the result times π, or 3.14 for an estimate.- That's it; you found the
**cylinder circumference**.

or you can use**the diameter of the cylinder**:

**Multiply**el diameter by π, or 3.14.- The result is the
**cylinder circumference**.

### How can I find the area of a circle with a circumference of 1 meter?

If you want**find the area of a circle with a circumference of 1 meter**, do the following:

**Share**the circumference by π. This is him**circle diameter**, in this case, 31.8 centimeters.**Share**by 2. This result is the**circle radius**of 15.9 centimeters.**Multiply**the radius with itself, obtaining the square, in our case 256 cm².**Multiply**times π, or 3.14 for an estimate.- That's it;
**A circle with a circumference of 1 meter has an area of 795.78 cm²**.

### How to find the radius of a circle with a circumference of 10 centimeters?

AN**find the radius of a circle with a circumference of 10 centimeters**, you must do the following:

**Share**circumference times π, or 3.14 for an estimate. The result is the diameter of the circle, 3.18 centimeters.**Share**the diameter by 2.- and there you go
**The radius of a circle with a circumference of 10 centimeters is 1.59 centimeters.**.

### What is the unit of the circumference of a circle?

Since the circumference of a circle is the linear distance from the edge of the circle, it describes a length. Therefore, the**The most common units for the circumference of a circle are the millimeter, centimeter, meter for the metric system, and the inch, foot, and yard for the imperial system.**.