Currency Exchange Rate Calculator GUI

Abstract

Create a professional currency exchange rate calculator with a graphical interface that fetches real-time exchange rates from an API and converts between multiple currencies. This project demonstrates GUI development, API integration, and financial data processing.

Prerequisites

Python 3.6 or above
Text Editor or IDE
Basic understanding of Python syntax
Knowledge of Tkinter for GUI development
Familiarity with HTTP requests and APIs
Understanding of JSON data processing

Getting Started

Create a new project

Create a new project folder and name it currencyExchangeCalculatorcurrencyExchangeCalculator.
Create a new file and name it currencyexchnageratecalculator.pycurrencyexchnageratecalculator.py.
Open the project folder in your favorite text editor or IDE.
Copy the code below and paste it into your currencyexchnageratecalculator.pycurrencyexchnageratecalculator.py file.

Install required dependencies

Install requests library for API calls:

pip install requests

pip install requests

Write the code

Add the following code to your currencyexchnageratecalculator.pycurrencyexchnageratecalculator.py file.

⚙️ Currency Exchange Rate Calculator GUI

Currency Exchange Rate Calculator GUI

# Currency Exchange Rate Calculator GUI
 
from tkinter import *
from tkinter import ttk
from tkinter import messagebox
import requests
import json
 
# Create an instance of tkinter frame
win = Tk()
 
# Set the geometry of tkinter frame
win.geometry("700x400")
 
# Set the title of tkinter frame
win.title("Currency Exchange Rate Calculator")
 
# Disable resizing the GUI by passing in False/False
win.resizable(False, False)
 
# Create a function to convert currency
def exchange():
    # Get the amount from the amount entry box
    amount = float(amount_entry.get())
    
    # Get the currency from the currency combobox
    currency = currency_combo.get()
    
    # Get the converted currency from the converted currency combobox
    converted_currency = converted_currency_combo.get()
    
    # Create a base URL
    base_url = "https://api.exchangerate-api.com/v4/latest/"
    
    # Create a full URL
    full_url = base_url + currency
    
    # Send a request to the URL
    response = requests.get(full_url)
    
    # Convert the response to JSON format
    response_json = response.json()
    
    # Get the currency rates from the response
    rates = response_json['rates']
    
    # Get the currency rate for the converted currency
    converted_currency_rate = rates[converted_currency]
    
    # Calculate the converted currency amount
    converted_currency_amount = converted_currency_rate * amount
    
    # Round the converted currency amount to 2 decimal places
    converted_currency_amount = round(converted_currency_amount, 2)
    
    # Create a message box to display the converted currency amount
    messagebox.showinfo("Converted Currency Amount", f"{converted_currency_amount} {converted_currency}")
    
# Create a function to clear the GUI
def clear():
    # Clear the amount entry box
    amount_entry.delete(0, END)
    
    # Clear the currency combobox
    currency_combo.set("")
    
    # Clear the converted currency combobox
    converted_currency_combo.set("")
    
# Create a function to exit the GUI
def exit():
    # Exit the GUI
    win.destroy()
    
# Create a label for the amount entry box
amount_label = Label(win, text="Amount:", font=("Arial", 10, "bold"))
 
# Create a label for the currency combobox
currency_label = Label(win, text="Currency:", font=("Arial", 10, "bold"))
 
# Create a label for the converted currency combobox
converted_currency_label = Label(win, text="Converted Currency:", font=("Arial", 10, "bold"))
 
# Create a label for the amount entry box
amount_label.place(x=30, y=50)
 
# Create a label for the currency combobox
currency_label.place(x=30, y=100)
 
# Create a label for the converted currency combobox
converted_currency_label.place(x=30, y=150)
 
# Create a variable for the amount entry box
amount = StringVar()
 
# Create an entry box for the amount
amount_entry = Entry(win, textvariable=amount, font=("Arial", 10, "normal"), width=20)
 
# Create a variable for the currency combobox
currency = StringVar()
 
# Create a combobox for the currency
currency_combo = ttk.Combobox(win, textvariable=currency, font=("Arial", 10, "normal"), width=18)
 
# Create a variable for the converted currency combobox
converted_currency = StringVar()
 
# Create a combobox for the converted currency
converted_currency_combo = ttk.Combobox(win, textvariable=converted_currency, font=("Arial", 10, "normal"), width=18)
 
# Create a list of currencies
currencies = ["USD", "EUR", "GBP", "INR", "AUD", "CAD", "SGD", "CHF", "MYR", "JPY", "CNY"]
 
# Set the default value for the currency combobox
currency_combo.set("Select Currency")
 
# Set the default value for the converted currency combobox
converted_currency_combo.set("Select Converted Currency")
 
# Add the currencies to the currency combobox
currency_combo['values'] = currencies
 
# Add the currencies to the converted currency combobox
converted_currency_combo['values'] = currencies
 
# Create a button to convert currency
convert_button = Button(win, text="Convert", font=("Arial", 10, "bold"), command=exchange)
 
# Create a button to clear the GUI
clear_button = Button(win, text="Clear", font=("Arial", 10, "bold"), command=clear)
 
# Create a button to exit the GUI
exit_button = Button(win, text="Exit", font=("Arial", 10, "bold"), command=exit)
 
# Create an entry box for the amount
amount_entry.place(x=200, y=50)
 
# Create a combobox for the currency
currency_combo.place(x=200, y=100)
 
# Create a combobox for the converted currency
converted_currency_combo.place(x=200, y=150)
 
# Create a button to convert currency
convert_button.place(x=30, y=200)
 
# Create a button to clear the GUI
clear_button.place(x=130, y=200)
 
# Create a button to exit the GUI
exit_button.place(x=230, y=200)
 
# Run the tkinter event loop
win.mainloop()

Currency Exchange Rate Calculator GUI

# Currency Exchange Rate Calculator GUI
 
from tkinter import *
from tkinter import ttk
from tkinter import messagebox
import requests
import json
 
# Create an instance of tkinter frame
win = Tk()
 
# Set the geometry of tkinter frame
win.geometry("700x400")
 
# Set the title of tkinter frame
win.title("Currency Exchange Rate Calculator")
 
# Disable resizing the GUI by passing in False/False
win.resizable(False, False)
 
# Create a function to convert currency
def exchange():
    # Get the amount from the amount entry box
    amount = float(amount_entry.get())
    
    # Get the currency from the currency combobox
    currency = currency_combo.get()
    
    # Get the converted currency from the converted currency combobox
    converted_currency = converted_currency_combo.get()
    
    # Create a base URL
    base_url = "https://api.exchangerate-api.com/v4/latest/"
    
    # Create a full URL
    full_url = base_url + currency
    
    # Send a request to the URL
    response = requests.get(full_url)
    
    # Convert the response to JSON format
    response_json = response.json()
    
    # Get the currency rates from the response
    rates = response_json['rates']
    
    # Get the currency rate for the converted currency
    converted_currency_rate = rates[converted_currency]
    
    # Calculate the converted currency amount
    converted_currency_amount = converted_currency_rate * amount
    
    # Round the converted currency amount to 2 decimal places
    converted_currency_amount = round(converted_currency_amount, 2)
    
    # Create a message box to display the converted currency amount
    messagebox.showinfo("Converted Currency Amount", f"{converted_currency_amount} {converted_currency}")
    
# Create a function to clear the GUI
def clear():
    # Clear the amount entry box
    amount_entry.delete(0, END)
    
    # Clear the currency combobox
    currency_combo.set("")
    
    # Clear the converted currency combobox
    converted_currency_combo.set("")
    
# Create a function to exit the GUI
def exit():
    # Exit the GUI
    win.destroy()
    
# Create a label for the amount entry box
amount_label = Label(win, text="Amount:", font=("Arial", 10, "bold"))
 
# Create a label for the currency combobox
currency_label = Label(win, text="Currency:", font=("Arial", 10, "bold"))
 
# Create a label for the converted currency combobox
converted_currency_label = Label(win, text="Converted Currency:", font=("Arial", 10, "bold"))
 
# Create a label for the amount entry box
amount_label.place(x=30, y=50)
 
# Create a label for the currency combobox
currency_label.place(x=30, y=100)
 
# Create a label for the converted currency combobox
converted_currency_label.place(x=30, y=150)
 
# Create a variable for the amount entry box
amount = StringVar()
 
# Create an entry box for the amount
amount_entry = Entry(win, textvariable=amount, font=("Arial", 10, "normal"), width=20)
 
# Create a variable for the currency combobox
currency = StringVar()
 
# Create a combobox for the currency
currency_combo = ttk.Combobox(win, textvariable=currency, font=("Arial", 10, "normal"), width=18)
 
# Create a variable for the converted currency combobox
converted_currency = StringVar()
 
# Create a combobox for the converted currency
converted_currency_combo = ttk.Combobox(win, textvariable=converted_currency, font=("Arial", 10, "normal"), width=18)
 
# Create a list of currencies
currencies = ["USD", "EUR", "GBP", "INR", "AUD", "CAD", "SGD", "CHF", "MYR", "JPY", "CNY"]
 
# Set the default value for the currency combobox
currency_combo.set("Select Currency")
 
# Set the default value for the converted currency combobox
converted_currency_combo.set("Select Converted Currency")
 
# Add the currencies to the currency combobox
currency_combo['values'] = currencies
 
# Add the currencies to the converted currency combobox
converted_currency_combo['values'] = currencies
 
# Create a button to convert currency
convert_button = Button(win, text="Convert", font=("Arial", 10, "bold"), command=exchange)
 
# Create a button to clear the GUI
clear_button = Button(win, text="Clear", font=("Arial", 10, "bold"), command=clear)
 
# Create a button to exit the GUI
exit_button = Button(win, text="Exit", font=("Arial", 10, "bold"), command=exit)
 
# Create an entry box for the amount
amount_entry.place(x=200, y=50)
 
# Create a combobox for the currency
currency_combo.place(x=200, y=100)
 
# Create a combobox for the converted currency
converted_currency_combo.place(x=200, y=150)
 
# Create a button to convert currency
convert_button.place(x=30, y=200)
 
# Create a button to clear the GUI
clear_button.place(x=130, y=200)
 
# Create a button to exit the GUI
exit_button.place(x=230, y=200)
 
# Run the tkinter event loop
win.mainloop()

Save the file.
Run the following command to run the application.

command

C:\Users\username\Documents\currencyExchangeCalculator> python currencyexchnageratecalculator.py
[Currency Exchange Calculator GUI Opens]
- Enter amount to convert
- Select base currency from dropdown
- Select target currency from dropdown
- Click "Convert" to get real-time exchange rate
- Result displayed in popup message
Example: 100 USD to EUR = 85.23 EUR

command

C:\Users\username\Documents\currencyExchangeCalculator> python currencyexchnageratecalculator.py
[Currency Exchange Calculator GUI Opens]
- Enter amount to convert
- Select base currency from dropdown
- Select target currency from dropdown
- Click "Convert" to get real-time exchange rate
- Result displayed in popup message
Example: 100 USD to EUR = 85.23 EUR

Use the Application
- Enter the amount to convert
- Select source currency from dropdown
- Select target currency from dropdown
- Click “Convert” to get real-time exchange rate

 
## Explanation
 
1. The `import tkinter as tk` statement imports the Tkinter library for creating the GUI.
2. The `import requests` statement imports the requests library for making API calls.
3. The `win = Tk()` creates the main window for the application.
4. The `win.geometry("700x400")` sets the window size to 700x400 pixels.
5. The `def exchange():` function handles the currency conversion logic.
6. The `requests.get()` function fetches real-time exchange rates from the API.
7. The `response.json()` parses the JSON response from the API.
8. The `rates[converted_currency]` extracts the specific exchange rate.
9. The `messagebox.showinfo()` displays the conversion result in a popup.
10. The `ttk.Combobox()` creates dropdown menus for currency selection.
11. The `Button()` widget creates the convert button with the exchange function.
12. The currency list includes major world currencies for conversion.
 
## Next Steps
 
Congratulations! You have successfully created a Currency Exchange Rate Calculator GUI in Python. Experiment with the code and see if you can modify the application. Here are a few suggestions:
- Add more currencies to the selection list
- Implement historical exchange rate charts
- Add currency conversion history tracking
- Create offline mode with cached rates
- Implement currency rate alerts and notifications
- Add calculator-style number input
- Create currency trend analysis features
- Add favorite currency pairs
- Implement rate comparison between different providers
 
## Conclusion
 
In this project, you learned how to create a Currency Exchange Rate Calculator GUI in Python using Tkinter and API integration. You also learned about working with real-time data, JSON processing, and creating professional GUI applications. You can find the source code on [GitHub](https://github.com/Ravikisha/PythonCentralHub/blob/main/projects/beginners/currencyexchnageratecalculator.py)

 
## Explanation
 
1. The `import tkinter as tk` statement imports the Tkinter library for creating the GUI.
2. The `import requests` statement imports the requests library for making API calls.
3. The `win = Tk()` creates the main window for the application.
4. The `win.geometry("700x400")` sets the window size to 700x400 pixels.
5. The `def exchange():` function handles the currency conversion logic.
6. The `requests.get()` function fetches real-time exchange rates from the API.
7. The `response.json()` parses the JSON response from the API.
8. The `rates[converted_currency]` extracts the specific exchange rate.
9. The `messagebox.showinfo()` displays the conversion result in a popup.
10. The `ttk.Combobox()` creates dropdown menus for currency selection.
11. The `Button()` widget creates the convert button with the exchange function.
12. The currency list includes major world currencies for conversion.
 
## Next Steps
 
Congratulations! You have successfully created a Currency Exchange Rate Calculator GUI in Python. Experiment with the code and see if you can modify the application. Here are a few suggestions:
- Add more currencies to the selection list
- Implement historical exchange rate charts
- Add currency conversion history tracking
- Create offline mode with cached rates
- Implement currency rate alerts and notifications
- Add calculator-style number input
- Create currency trend analysis features
- Add favorite currency pairs
- Implement rate comparison between different providers
 
## Conclusion
 
In this project, you learned how to create a Currency Exchange Rate Calculator GUI in Python using Tkinter and API integration. You also learned about working with real-time data, JSON processing, and creating professional GUI applications. You can find the source code on [GitHub](https://github.com/Ravikisha/PythonCentralHub/blob/main/projects/beginners/currencyexchnageratecalculator.py)

Currency Exchange Rate Calculator GUI

Abstract

Prerequisites

Getting Started

Create a new project

Install required dependencies

Write the code

Was this page helpful?