Circumference, Area, Diameter Calculator

What is a Circumference, Area, Diameter Calculator?

A Circumference, Area, Diameter Calculator is a tool that helps you quickly find the key measurements of a circle:

1. Circumference – The perimeter or boundary of the circle.
2. Area – The space inside the circle.
3. Diameter – The full width of the circle (twice the radius).

The calculator uses the following formulas:

where:

• r = Radius
• d = Diameter
• π ≈ 3.14159

Why Use This Calculator?

• Saves time – No need to manually compute each value.
• Prevents errors – Ensures accuracy in mathematical or practical applications.
• Multi-purpose – Useful for geometry, engineering, design, and daily life tasks like measuring round objects.

How Does It Work?

1. Enter any one value (radius, diameter, circumference, or area).
2. Click Calculate – The tool applies the appropriate formulas.
3. Get all other values – The calculator will instantly display the missing values.

When to Use It?

• Mathematics & geometry problems involving circles.
• Construction & engineering for designing round structures.
• Art & design when working with circular patterns.
• Manufacturing & measurements (e.g., pipe diameter, wheel circumference).