font.getsize()

Detail

Exact size depends on many factors. I’ll just show you how to calculate different metrics of font.

font = ImageFont.truetype('arial.ttf', font_size)
ascent, descent = font.getmetrics()
(width, baseline), (offset_x, offset_y) = font.font.getsize(text)

• Height of red area: offset_y
• Height of green area: ascent - offset_y
• Height of blue area: descent
• Black rectangle: font.getmask(text).getbbox()

Application Example

Reference

• https://stackoverflow.com/questions/43060479/how-to-get-the-font-pixel-height-using-pils-imagefont-class