Title: Get font width/height in pixels
This example gets Form.Font width and height. Use TextWidth and TextHeight methods of TCanvas type.
procedure TForm1.Button1Click(Sender: TObject);
begin
Label1.Caption:='Width is '+
IntToStr(Form1.Canvas.TextWidth(Edit1.Text))+
' pixels';
Label2.Caption:='Height is '+
IntToStr(Form1.Canvas.TextHeight(Edit1.Text))+
' pixels';;
end;