Align text vertically in the middle of the screen

How can we ask the font size (height) so we can align the text in the middle of the screen?

To ask the width you can use dc.getTextWidthInPixels() but there is not a dc.getTextHeightInPixels(font) function. Or is there an other way to get the font size in pixels?

Also: Creating a new project (watch face) will not align the time in the middle of the screen.

Best regards,
Antoine