How can I tell a Tkinter window where to open, based on screen dimensions? I would like it to open in the middle.

## Here is Solutions:

We have many solutions to this problem, But we recommend you to use the first solution because it is tested & true solution that will 100% work for you.

### Solution 1

This answer is based on Rachel’s answer. Her code did not work originally, but with some tweaking I was able to fix the mistakes.

```
import tkinter as tk
root = tk.Tk() # create a Tk root window
w = 800 # width for the Tk root
h = 650 # height for the Tk root
# get screen width and height
ws = root.winfo_screenwidth() # width of the screen
hs = root.winfo_screenheight() # height of the screen
# calculate x and y coordinates for the Tk root window
x = (ws/2) - (w/2)
y = (hs/2) - (h/2)
# set the dimensions of the screen
# and where it is placed
root.geometry('%dx%d+%d+%d' % (w, h, x, y))
root.mainloop() # starts the mainloop
```

### Solution 2

Try this

```
import tkinter as tk
def center_window(width=300, height=200):
# get screen width and height
screen_width = root.winfo_screenwidth()
screen_height = root.winfo_screenheight()
# calculate position x and y coordinates
x = (screen_width/2) - (width/2)
y = (screen_height/2) - (height/2)
root.geometry('%dx%d+%d+%d' % (width, height, x, y))
root = tk.Tk()
center_window(500, 400)
root.mainloop()
```

### Solution 3

```
root.geometry('250x150+0+0')
```

The first two parameters are the width and height of the window. The last two parameters are x and y screen coordinates. You can specify the required x and y coordinates

### Solution 4

If you would like the window to be centered, this type of function may help you:

```
def center_window(size, window) :
window_width = size[0] #Fetches the width you gave as arg. Alternatively window.winfo_width can be used if width is not to be fixed by you.
window_height = size[1] #Fetches the height you gave as arg. Alternatively window.winfo_height can be used if height is not to be fixed by you.
window_x = int((window.winfo_screenwidth() / 2) - (window_width / 2)) #Calculates the x for the window to be in the centre
window_y = int((window.winfo_screenheight() / 2) - (window_height / 2)) #Calculates the y for the window to be in the centre
window_geometry = str(window_width) + 'x' + str(window_height) + '+' + str(window_x) + '+' + str(window_y) #Creates a geometric string argument
window.geometry(window_geometry) #Sets the geometry accordingly.
return
```

Here, the `window.winfo_screenwidth`

function is used for getting the `width`

of the device screen.

And the `window.winfo_screenheight`

function is used for getting the `height`

of the device screen.

Here you can call this function and pass a tuple with the (width, height) of the screen as the size.

You can customize the calculation as much as you want and it will change accordingly.

### Solution 5

`root.geometry('520x400+350+200')`

Explanation: (‘width x height + X coordinate + Y coordinate’)

### Solution 6

A slight expansion to allow positioning around the screen

```
def position_window(width=300, height=200, xf = 0.5, yf = 0.5):
# get screen width and height
screen_width = root.winfo_screenwidth()
screen_height = root.winfo_screenheight()
# calculate position x and y coordinates
x = (screen_width*xf) - (width/2)
y = (screen_height*yf) - (height/2)
if x > screen_width-width:
x = screen_width-width
if x < width:
x = 0.0
if y > screen_height-height:
y = screen_height-height*1.25
if y < 0:
y = 0
root.geometry('%dx%d+%d+%d' % (width, height, x, y))
```

**Note: Use and implement solution 1 because this method fully tested our system.Thank you 🙂**

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