pythonstringuser-interfacetkinterwidth

Get PythonTkinter width of string in pixels using given font

Given a string such as "this is a string" or "THIS IS A STRING" and knowing the font family and size, how can the pixel width be calculated?

This is required to align columns for an eyesome GUI.

Solution

  • There is a method measure() of Font object to give the width in pixels of a string:

    import tkinter as tk
from tkinter.font import Font

root = tk.Tk()
font = Font(family='Arial', size=20)

for s in ('this is a string', 'THIS IS A STRING'):
    w = font.measure(s)
    print(f'Width of "{s}" is {w} pixels')

    Output:

    Width of "this is a string" is 169 pixels
Width of "THIS IS A STRING" is 231 pixels

    Document on measure().