Circle Area Calculator
This free online calculator will help you to find the area of a circle, when you know the langth of circle radius or circle diameter.
Using this online calculator, you will receive a detailed step-by-step solution to your problem, which will help you understand the algorithm how to find circle area.
Calculation of Circle Area
Select defined data
π =Area in
Entering data into the circle area calculator
To calculate the area of a circle:
- select defined data - radius, diameter or circumference;
- enter the value of data;
- select units of measurement - meter (m), centimeter (cm) or millimeter (mm);
- select the value of π;
- select in which units you want to get the area - square meters (m2), square centimeters (cm2) or square millimeters (mm2).
You can input only integer numbers or fractions in this online calculator. More in-depth information read at these rules.
If you have any difficulties with units conversion, you can use the length converter and area converter.
Theory. Circle Area
Circle is a simple shape consisting of those points in a plane that are equidistant from a given point, the centre. The distance between any of the points and the centre is called the radius.
The formulas for calculating of circle area:
- A = π r2
- A =
π d2 1 4
- A =
r - circle radius,
d - circle diameter,
π = 3.141592.
You can input only integer numbers, decimals or fractions in this online calculator (-2.4, 5/7, ...). More in-depth information read at these rules.
Try online calculators for calculation of geometrical figures areaTriangle Area Calculator (9 diferent ways)Online calculator. Triangle area. Heron's formulaQuadrilateral Area CalculatorSquare Area CalculatorRectangle Area CalculatorParallelogram Area CalculatorRhombus Area CalculatorTrapezium Area CalculatorCircle Area CalculatorEllipse Area CalculatorShow all online calculators
See also Circle, segment, sector: formulas and properties Area Formulas for Geometric Figures. Length and width converter Area converter Perimeter calculators
Add the comment