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Canvas arc() Method

❮ Canvas Reference

Example

Create a circle:

YourbrowserdoesnotsupporttheHTML5canvastag.

JavaScript:

const canvas = document.getElementById("myCanvas");
const ctx = canvas.getContext("2d");

ctx.beginPath();
ctx.arc(100, 75, 50, 0, 2 * Math.PI);
ctx.stroke();
Try it Yourself »

More examples below.


Description

The arc() method adds an arc (curve) to the path.

The arc() method creates a circle or a part of a circle.

Use the stroke() or fill() method to draw the path.

An arc

Center: arc(100, 75, 50, 0 * Math.PI, 1.5 * Math.PI)

Start angle: arc(100, 75, 50, 0, 1.5 * Math.PI)

End angle: arc(100, 75, 50, 0 * Math.PI, 1.5 * Math.PI)

Note

To create a circle: Set start angle to 0 and end angle to 2*Math.PI.

To create half a circle: Set start angle to 0 and end angle to Math.PI.

See Also:

The beginPath() Method (Start a new path)

The closePath() Method (Close current path)

The moveTo() Method (Move the path to a point)

The lineTo() Method (Add a line to the path)

The fill() Method (Fill current path)

The stroke() Method (Draw current path)

The arcTo() Method (Add a circle to the path)

The bezierCurveTo() Method (Add a curve to the path)

The quadraticCurveTo() Method (Add a curve to the path)


Syntax

context.arc(x, y, r, sAngle, eAngle, counterclockwise)

Parameter Values

Param Description Play it
x The x-coordinate of the center of the circle Play it »
y The y-coordinate of the center of the circle Play it »
r The radius of the circle Play it »
sAngle The starting angle, in radians (0 is at the 3 o'clock position of the arc's circle) Play it »
eAngle The ending angle, in radians Play it »
counterclockwise Optional. Specifies whether the drawing should be counterclockwise or clockwise. False is default, and indicates clockwise, while true indicates counter-clockwise. Play it »

Return Value

NONE


More Examples

Example

Draw an orange circle:

YourbrowserdoesnotsupporttheHTML5canvastag.

JavaScript:

const canvas = document.getElementById("myCanvas");
const ctx = canvas.getContext("2d");

ctx.beginPath();
ctx.arc(100, 75, 50, 0, 2 * Math.PI);
ctx.fillStyle = "orange";
ctx.fill();
Try it Yourself »

Browser Support

The <canvas> element is an HTML5 standard (2014).

arc() is supported in all modern browsers:

Chrome Edge Firefox Safari Opera IE
Yes Yes Yes Yes Yes 9-11

❮ Canvas Reference