Create Countdown Timer using PythonTkinter (original) (raw)

Create Countdown Timer using Python-Tkinter

Last Updated : 15 Jul, 2025

Prerequisites: Python GUI – tkinter
Python Tkinter is a GUI programming package or built-in library. Tkinter provides the Tk GUI toolkit with a potent object-oriented interface. Python with Tkinter is the fastest and easiest way to create GUI applications. Creating a GUI using Tkinter is an easy task.
Approach

Importing the module – tkinter, time
Create the main window (container)
Add number of widgets to the main window:Button, Entry
Apply the event Trigger on the widgets.

Below is the implementation.

python3 `

import time from tkinter import * from tkinter import messagebox

creating Tk window

root = Tk()

setting geometry of tk window

root.geometry("300x250")

Using title() to display a message in

the dialogue box of the message in the

title bar.

root.title("Time Counter")

Declaration of variables

hour=StringVar() minute=StringVar() second=StringVar()

setting the default value as 0

hour.set("00") minute.set("00") second.set("00")

Use of Entry class to take input from the user

hourEntry= Entry(root, width=3, font=("Arial",18,""), textvariable=hour) hourEntry.place(x=80,y=20)

minuteEntry= Entry(root, width=3, font=("Arial",18,""), textvariable=minute) minuteEntry.place(x=130,y=20)

secondEntry= Entry(root, width=3, font=("Arial",18,""), textvariable=second) secondEntry.place(x=180,y=20)

def submit(): try: # the input provided by the user is # stored in here :temp temp = int(hour.get())*3600 + int(minute.get())*60 + int(second.get()) except: print("Please input the right value") while temp >-1:

    # divmod(firstvalue = temp//60, secondvalue = temp%60)
    mins,secs = divmod(temp,60) 

    # Converting the input entered in mins or secs to hours,
    # mins ,secs(input = 110 min --> 120*60 = 6600 => 1hr :
    # 50min: 0sec)
    hours=0
    if mins >60:
        
        # divmod(firstvalue = temp//60, secondvalue 
        # = temp%60)
        hours, mins = divmod(mins, 60)
    
    # using format () method to store the value up to 
    # two decimal places
    hour.set("{0:2d}".format(hours))
    minute.set("{0:2d}".format(mins))
    second.set("{0:2d}".format(secs))

    # updating the GUI window after decrementing the
    # temp value every time
    root.update()
    time.sleep(1)

    # when temp value = 0; then a messagebox pop's up
    # with a message:"Time's up"
    if (temp == 0):
        messagebox.showinfo("Time Countdown", "Time's up ")
    
    # after every one sec the value of temp will be decremented
    # by one
    temp -= 1

btn = Button(root, text='Set Time Countdown', bd='5', command= submit) btn.place(x = 70,y = 120)

Create Countdown Timer using PythonTkinter (original) (raw)