Circle

HISTORY

# Circle Area, Circumference, Diameter & Radius Calculator

getcalc.com's **Circle Formulas & Calculator** is an online basic geometry tool to calculate area, circumference, diameter & radius of a circle shape, in both US customary & metric (SI) units.

## Steps to Find Area of a Circle

The step by step workout for how to find what is the area of a circle.__Workout :__

step1 Address the formula, input parameters and values

Radius = 5 in

step 2 Find area of circle using radius values

Area = πr²

= π x (5)² in²

= 3.1416 x 25 in²

Area = 78.5398 in²

## Definition & Formulas

**Circle** is a round plane with every point on its boundary consists of equal length from the center point. Any distance between any point on the boundary and the center is called the radius. The straight from any point to another through the the center point is called the diameter.

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