Determine Label Size based upon amount of text and font size in Winforms/C#

Graphics.MeasureString() will probably help you.

This is also one of the only usecases for using the Control.CreateGraphics() call!

How about Graphics.MeasureString, with the overload that accepts a string, the font, and the max width? This returns a SizeF, so you can round round-off the Height.

        using(Graphics g = CreateGraphics()) {
            SizeF size = g.MeasureString(text, lbl.Font, 495);
            lbl.Height = (int) Math.Ceiling(size.Height);
            lbl.Text = text;
        }

Size maxSize = new Size(495, int.MaxValue);
_label.Height = TextRenderer.MeasureText(_label.Text , _label.Font, maxSize).Height;

System.Drawing.Graphics has a MeasureString method that you can use for this purpose. Use the overload that takes a string, a font, and an int "width" parameter; this last parameter specifies the maximum width allowed for the string - use the set width of your label for this parameter.

MeasureString returns a SizeF object. Use the Height property of this returned object to set the height of your label.

Note: to get a Graphics object for this purpose, you can call this.CreateGraphics.