Skip to content
Related Articles

Related Articles

Improve Article

Python – Compound Interest GUI Calculator using Tkinter

  • Last Updated : 11 Jun, 2021

Prerequisites : Introduction to tkinter | Program to calculate compound interest

Python offers multiple options for developing a GUI (Graphical User Interface). Out of all the GUI methods, Tkinter is the most commonly used method. In this article, we will learn how to create a Compound Interest GUI Calculator application using Tkinter, with a step-by-step guide.
 

 Attention geek! Strengthen your foundations with the Python Programming Foundation Course and learn the basics.  

To begin with, your interview preparations Enhance your Data Structures concepts with the Python DS Course. And to begin with your Machine Learning Journey, join the Machine Learning - Basic Level Course

To create a Tkinter: 



  • Importing the module – tkinter
  • Create the main window (container)
  • Add any number of widgets to the main window.
  • Apply the event Trigger on the widgets.

Below is what the GUI will look like:

Let’s create a GUI based Compound Interest Calculator application.
 

Below is the implementation :
 

Python3




# import all classes / functions from the tkinter
from tkinter import *
 
# Function for clearing the 
# contents of all entry boxes  
def clear_all() :
 
    # whole content of entry boxes is deleted
    principle_field.delete(0, END)  
    rate_field.delete(0, END)
    time_field.delete(0, END)
    compound_field.delete(0, END)
   
    # set focus on the principle_field entry box 
    principle_field.focus_set()
 
 
# Function to find compound interest 
def calculate_ci():
 
    # get a content from entry box
    principle = int(principle_field.get())
     
    rate = float(rate_field.get())
 
    time = int(time_field.get())
     
    # Calculates compound interest 
    CI = principle * (pow((1 + rate / 100), time))
 
    # insert method inserting the 
    # value in the text entry box.
    compound_field.insert(10, CI)
 
     
 
# Driver code
if __name__ == "__main__" :
   
    # Create a GUI window
    root = Tk()
   
    # Set the background colour of GUI window
    root.configure(background = 'light green')
   
    # Set the configuration of GUI window
    root.geometry("400x250")
   
    # set the name of tkinter GUI window
    root.title("Compound Interest Calculator"
       
    # Create a Principle Amount : label
    label1 = Label(root, text = "Principle Amount(Rs) : ",
                   fg = 'black', bg = 'red')
   
    # Create a Rate : label
    label2 = Label(root, text = "Rate(%) : ",
                   fg = 'black', bg = 'red')
       
    # Create a Time : label
    label3 = Label(root, text = "Time(years) : ",
                   fg = 'black', bg = 'red')
 
    # Create a Compound Interest : label
    label4 = Label(root, text = "Compound Interest : ",
                   fg = 'black', bg = 'red')
 
    # grid method is used for placing 
    # the widgets at respective positions 
    # in table like structure .
 
    # padx keyword argument used to set padding along x-axis .
    # pady keyword argument used to set padding along y-axis .
    label1.grid(row = 1, column = 0, padx = 10, pady = 10
    label2.grid(row = 2, column = 0, padx = 10, pady = 10
    label3.grid(row = 3, column = 0, padx = 10, pady = 10)
    label4.grid(row = 5, column = 0, padx = 10, pady = 10)
 
    # Create a entry box 
    # for filling or typing the information.
    principle_field = Entry(root) 
    rate_field = Entry(root) 
    time_field = Entry(root)
    compound_field = Entry(root)
 
    # grid method is used for placing 
    # the widgets at respective positions 
    # in table like structure .
     
    # padx keyword argument used to set padding along x-axis .
    # pady keyword argument used to set padding along y-axis .
    principle_field.grid(row = 1, column = 1, padx = 10, pady = 10
    rate_field.grid(row = 2, column = 1, padx = 10, pady = 10
    time_field.grid(row = 3, column = 1, padx = 10, pady = 10)
    compound_field.grid(row = 5, column = 1, padx = 10, pady = 10)
 
    # Create a Submit Button and attached 
    # to calculate_ci function 
    button1 = Button(root, text = "Submit", bg = "red"
                     fg = "black", command = calculate_ci)
   
    # Create a Clear Button and attached 
    # to clear_all function 
    button2 = Button(root, text = "Clear", bg = "red"
                     fg = "black", command = clear_all)
   
    button1.grid(row = 4, column = 1, pady = 10)
    button2.grid(row = 6, column = 1, pady = 10)
 
    # Start the GUI 
    root.mainloop()
    

Output : 
 




My Personal Notes arrow_drop_up
Recommended Articles
Page :