# Category: Area of a circle calculator

Use this circle calculator to find the area, circumference, radius or diameter of a circle. Given any one variable A, C, r or d of a circle you can calculate the other three unknowns.

Units: Note that units of length are shown for convenience. They do not affect the calculations. The units are in place to give an indication of the order of the results such as ft, ft 2 or ft 3. Any other base unit can be substituted. Using the formulas above and additional formulas you can calculate properties of a given circle for any given variable.

Calculate A, C and d Given r Given the radius of a circle calculate the area, circumference and diameter. Putting A, C and d in terms of r the equations are:.

Calculate r, C and d Given A Given the area of a circle calculate the radius, circumference and diameter. Putting r, C and d in terms of A the equations are:.

Calculate A, r and d Given C Given the circumference of a circle calculate the radius, area and diameter. Putting A, r and d in terms of C the equations are:. Calculate A, C and r Given d Given the diameter of a circle calculate the radius, area and circumference. Putting A, C and r in terms of d the equations are:. Basic Calculator.

Circle Calculator. Circle Image. Units m cm mm yd ft in. Significant Figures auto 3 4 5 6 7 8 9. Answer: radius. Share this Answer Link: help Paste this link in email, text or social media.

Get a Widget for this Calculator. Follow CalculatorSoup:.Area of a circle is simply, number of square units fit into a circle. Our circle area calculator, requires diameter OR radius of a circle to calculate area of a given circle. Are you looking to calculate circumference of a circle? Circumference Calculator. Trapezoid Calculator Triangle Calculator Gravel Calculator Free calculator widget You can put this calculator widget on your website, web page or blog.

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Remember, the input can only be in feet ftinches inyards ydcentimetres cmmillimetres mm and metres m but never a combination of two different units! To understand how to calculate square footage we must first begin with the definition of area. An area is the size of a two-dimensional surface.

The area of a circle is the space contained within its circumference outer perimeter. To find out the area of a circle, we need to know its diameter which is the length of its widest part.

The diameter should be measured in feet ft for square footage calculations and if needed, converted to inches inyards ydcentimetres cmmillimetres mm and metres m. Our Square Footage Calculator helps you calculate the area required for making circular landscaping designs, carpeting, wall decals, centre moulding on a ceiling and floor tiling. Technology has advanced and with that, there have been many calculators which help users precisely measure things even from the comfort of their laptop or mobile phone.

Our area of circl calculator lets you easily find the area, circumference, radius or specific diameter of any circle.

With any of these variables A, C, r or d of a circle, you can precisely measure the other three unknowns. You can use this formula in many real world examples such as when building a house, drilling, filling holes with concrete etc. Essentially, the formula gives you accurate details on how much material you need or how big the surface you will drill into needs to be. However, you should also be aware that the area of a circle calculator demands other things which you need to know before measuring.

Circles are complex shapes. Perhaps, their main variable is the radius — which is measured from the center of the circle to any of its sides. Essentially, the diameter is twice the radius — or any line that goes from one side of the circle to the other while crossing its center.

The circumference of a circle, however, is not that commonly understood by many. Essentially, this variable can be defined as the distance around the circle or the entire length of the circuit along the circle.

### Understanding the Square footage:

Used since ancient geometrics, all of these variables let you precisely calculate anything related to a circle. However, instead of doing things manually, now you can use our area of a circle calculator and make use of the ready circle formula. Whether you are in class solving a math test or need an accurate calculation about the area of a circle for a project that you are building, the formula for area of a circle is simple — but not that simple when you are left with a pen and paper. All you need is another variable to get the other three and solve the problem immediately.

You need to know the diameter of the circle in either feet ftinches inyards ydcentimetres cmmillimetres mm or metres m. You can calculate the area of the circle border in square feet, in square inches, square yards, square centimetres, square millimetres and square meters. Yes, our tool is that awesome. Our calculator gives you the option of calculating the exact cost of materials. All you have to do is enter the price per unit area and voila, you have the total cost of materials in a single click!

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To convert among square feet, square inches, square yards, square centimetres, square millimetres and square meters you can utilize the following conversion table.

Many home improvement projects require you to measure the space you will be working in. Renovations such as installing new floori Exterior cladding, or siding as it is often called, can change the entire look of a house.

It can give it an entirely different l Why construction workers around the world utilize two different units to measure length?Use this calculator to easily calculate the area of a circle, given its radius in any metric: mm, cm, meters, km, inches, feet, yards, miles, etc.

Visual on the figure below:.

### Circle Calculator

The formula above is the one used in our area of a circle calculator. Calculation is easy once you have measured the circle's radius or diameter, or if you know it from plans and schematics: just plug the numbers into the formulas above use our area of a circle calculator above. If you are measuring it by hand, remember that the diameter is the largest measurement you can get from a circle.

Task 1: Given the radius of a cricle, find its area. Task 2: Find the area of a circle given its diameter is 12 cm. Circle geometry has a wide array of practical uses.

Circles are used when planning athletic tracks, recreational areas, buildings, and roundabouts, so knowing their area is important in construction, landscaping, etc. The famous Ferris-wheel attraction is a circle, as are the wheels on your car or bike.

Circle-like parts, e. The invention of the wheel was one of the transforming events in early human history, as it dramatically reduced the energy expended in moving stuff around and made travelling easier. If you'd like to cite this online calculator resource and information as provided on the page, you can use the following citation: Georgiev G. Calculators Converters Randomizers Articles Search. Area of a Circle Calculator Use this calculator to easily calculate the area of a circle, given its radius in any metric: mm, cm, meters, km, inches, feet, yards, miles, etc.

Circle radius. Calculation results Circle area Share calculator:. Embed this tool! How to calculate the area of a circle?The area of a circle calculator helps you compute the surface of a circle given a diameter or radius. We'll give you a tour of the most essential pieces of information regarding the area of a circle, its diameter, and its radius. We'll learn how to find the area of a circletalk about the area of a circle formulaand discuss the other branches of mathematics that use the very same equation.

So, let's see how to find the area of a circle.

## Area of a Circle Calculator

There are several ways to achieve it. Here, we can calculate the area of a circle using a diameter or using a radius. Area of a circle radius. The radius of a circle calculator uses the following area of a circle formula:. Area of a circle diameter. The diameter of a circle calculator uses the following equation:. Now that you know how to calculate the area of a circle, we encourage you to try our other circle calculators:.

If you want to know how to draw a circle? You can easily calculate everything, the area of a circle, its diameter, and its radius, using our area of a circle calculator in a blink of an eye:. Determine whether your given value is a diameter or a radius using the picture on the right and definitions available in the section above you can calculate area of a circle using diameter as well as radius. It didn't take long - your results are here! We decided to include the step-by-step solution and all the most important data right below the calculator.

The circle's area found with both the radius and diameter calculators serves as a base for many other equations - not only in mathematics but also in everyday life! Here are a few examples where knowing how to find the area of a circle might be useful:. We use calculations similar to this one when obtaining information about a spheresuch as sphere volume.

Do you fancy nice dresses? Maybe you love to sew? Discover our circle skirt calculator! Efficient sewing has never been easier. Embed Share via. Radius r. Diameter d. Area A.

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Arc length. Area of a rectangle. Table of contents: How to calculate the area of a circle? Area of a circle formula How to use the area of a circle calculator? Diameter to area and radius to area. Why do we need the surface area of a circle calculators?

How to calculate the area of a circle? Area of a circle formula So, let's see how to find the area of a circle. The radius begins at the center of the figure and ends at the figure's margin.

It doesn't matter whether you want to find the area of a circle using diameter or radius - you'll need to use this constant in almost every case. You can think of it as a giant slice of pizza.Buy a comprehensive geometric formulas ebook. All geometric formulas are explained with well selected word problems so you can master geometry. Geometry calculator. Area of a circle calculator. Top-notch introduction to physics. One stop resource to a deep understanding of important concepts in physics.

Formula for percentage. Finding the average. Basic math formulas Algebra word problems. Types of angles. Area of irregular shapes Math problem solver. Math skills assessment.

Compatible numbers. Surface area of a cube. Your email is safe with us. We will only use it to inform you about new math lessons. Follow me on Pinterest. Everything you need to prepare for an important exam! K tests, GED math test, basic math tests, geometry tests, algebra tests.

Tough Algebra Word Problems. If you can solve these problems with no help, you must be a genius!While a circle, symbolically, represents many different things to many different groups of people including concepts such as eternity, timelessness, and totality, a circle by definition is a simple closed shape. It is a set of all points in a plane that are equidistant from a given point, called the center. It can also be defined as a curve traced by a point where the distance from a given point remains constant as the point moves.

The distance between any point of a circle and the center of a circle is called its radius, while the diameter of a circle is defined as the largest distance between any two points on a circle.

Essentially, the diameter is twice the radius, as the largest distance between two points on a circle has to be a line segment through the center of a circle. The circumference of a circle can be defined as the distance around the circle, or the length of a circuit along the circle. It is also a transcendental number, meaning that it is not the root of any non-zero, polynomial that has rational coefficients. While it is now known that this is impossible, and imagining the ardent efforts of flustered ancient geometers attempting the impossible by candlelight might evoke a ludicrous image, it is important to remember that it is thanks to people like these that so many mathematical concepts are well defined today.

Financial Fitness and Health Math Other.Area of a circle Calculator.

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Calculates the area and circumference of a circle given the radius or diameter. Customer Voice. Area of a circle. Thank you for your questionnaire. Sending completion. To improve this 'Area of a circle Calculator', please fill in questionnaire.

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The hyperlink to [Area of a circle] Area of a circle Calculator. Related Calculator. Area of an equilateral triangle Area of a triangle given base and height Area of a triangle given sides and angle Area of a triangle Heron's formula Area of a triangle given base and angles Area of a square Area of a rectangle Area of a trapezoid Area of a rhombus Area of a parallelogram given base and height Area of a parallelogram given sides and angle Area of a cyclic quadrilateral Area of a quadrilateral Area of a regular polygon Side of polygon given area Area of a circle Radius of circle given area Area of a circular sector Area of an arch given angle Area of an arch given height and radius Area of an arch given height and chord Area of an ellipse Area of an elliptical sector Area of an elliptical arch Area of a parabolic arch Area of a hyperbolic sector Area of a hyperbolic arch Google maps area.

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