Photoshop: How to find the center of a circle?

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I drew a circle but having hard time locate the exact center of it. Any idea? thanks
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Ben C

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Posted 3 years ago

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Max Johnson, Champion

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I can't recommend the GuideGuide plugin enough:

but if you don't want to pay for a plugin, you could duplicate the layer, turn on View->Show...->Smart Guides, and shift-drag the second layer until it's edge aligns with the center of the first layer, then drag a guide there.
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Danny Smythe

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Select All,     Layer > Align Layers to Selection > Vertcle Centers,    Layer > Align Layers to Selection > Horizontal Centers.  Deselect and save as an Action.
 Go to the Move Tool and check Show Transform Controls.   It will now show your center.
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Len Goforth

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Just add a layer over it, then drag 2 lines across the circle, making sure that they intersect the circle at a point where a line perpendicular to the line you're creating is tangent to the circle.

In other words, imagine a line that is tangent to the circle where you first crossed it's border. The other side of the circle will have a line that is parallel to the first line, and also is tangent to the circle.

Here's another way:

1. Use the pen tool to make a line on an upper layer. Stroke said line and remove the path.
2. Duplicate said layer, and move it to the the other side of the circle.
3. Now draw a line that is perpendicular to both of these lines, that runs through the circle's center.

Repeat steps 1-3, making a second line through the center. Where they intersect is the center.

You need only two lines to find the center. Where these meed in the middle, is good enough for most needs. If not good enough, start over and measure.
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Ben C

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Thank you all