# What is the area of a circle with diameter 0.318 centimeters?

Here is the answer to questions like: how to find the area of a circle with diameter 0.318 centimeters?

Use the this circle area calculator below to find the area of a circle given its diameter, or other parameters. To calculate the area, you just need to enter a positive numeric value in one of the 3 fields of the calculator. You can also see at the bottom of the calculator, the step-by-step solution.

### Area of a Circle Calculator

## Formula for area of a circle

Here a three ways to find the area of a circle (formulas):

### Circle area formula in terms of radius

### Circle area formula in terms of diameter

### Circle area formula in terms of circumference

See below some definitions related to the formulas:

### Circumference

Circumference is the linear distance around the circle edge.

### Radius

The radius of a circle is any of the line segments from its center to its perimeter. The radius is half the diameter or r = ^{d}/_{2}.

### Diameter

The diameter of a circle is any straight line segment that passes through the center of the circle and whose endpoints lie on the circle. The diameter is twice the radius or d = 2r.

### The Greek letter π

π represents the number Pi which is defined as the ratio of the circumference of a circle to its diameter or π = ^{C} / _{d}. For simplicity, you can use Pi = 3.14 or Pi = 3.1415. Pi is an irrational number. The first 100 digits of Pi are: 3.1415926535 8979323846 2643383279 5028841971 6939937510 5820974944 5923078164 0628620899 8628034825 3421170679 ...

### Note:

If you input the radius in centimeters, you will get the answer in square centimeters (cmÂ²), if in inches, will get the answer in square inches (inÂ²) and so on ...

Circumference is often misspeled as circunference.

You can use our area unit converter to see the results in other units.

## Sample Circle Area Calculations

- Area of a Circle with circumference 15.9 meters
- Area of a Circle with circumference 9.1 centimeters
- Area of a Circle with circumference 19.5 miles
- Area of a Circle with circumference 4.6 mm
- Area of a Circle with diameter 3.1 miles
- Area of a Circle with diameter 2228 feet
- Area of a Circle with radius 18.1 meters
- Area of a Circle with circumference 11 pi miles
- Area of a Circle with radius 14.1 feet
- Area of a Circle with radius 37 centimeters

- Area of a Circle with circumference 14.5
- Area of a Circle with circumference 17.2 centimeters
- Area of a Circle with diameter 19.8
- Area of a Circle with circumference 6.28 kilometers
- Area of a Circle with radius 3.7 kilometers
- Area of a Circle with diameter 8.2
- Area of a Circle with diameter 16.7 units
- Area of a Circle with circumference 15 pi miles
- Area of a Circle with circumference 3.8 centimeters
- Area of a Circle with diameter 72 inches

- Area of a Circle with circumference 34.54 feet
- Area of a Circle with circumference 16.8 units
- Area of a Circle with diameter 7.4 mm
- Area of a Circle with circumference 12.1 yard
- Area of a Circle with radius 18.6 centimeters
- Area of a Circle with circumference 10.9 miles
- Area of a Circle with circumference 12.9 units
- Area of a Circle with diameter 9.3
- Area of a Circle with circumference 18.8 meters
- Area of a Circle with diameter 10.8 mm