Python Project: Distance Conversion Desktop App

Level: Real-World Project

Apr 03, 2025

∙ Paid

Project Overview 💡

In this project, you'll build a graphical Distance Converter app using Tkinter, Python's built-in GUI toolkit. You'll practice creating windows, input fields, dropdown menus, and handling events. This is a great introduction to building interactive desktop applications.

Challenge Yourself! 🚀

Before checking the solution, try building the app by yourself. See below for the detailed instructions.

Task:

Create a GUI that allows the user to:

Select conversion direction (KM to Miles or Miles to KM)
Enter a distance value
Press a button to convert it
Display the result on the screen

Expected Output:

When started the program looks like following:

The user can choose what conversion they want to make in the drop-down widget, enter a distance and press the Convert button to get the results:

Give it a shot! Scroll down when you're ready for the step-by-step guide.

Spoiler Alert!

Step-by-Step Guide

Step 1️⃣: Import Required Libraries

Import tkinter and ttk for GUI components, and messagebox for potential alerts.

Place this code in lines 1-2:

import tkinter as tk
from tkinter import ttk, messagebox

Step 2️⃣: Define the Conversion Logic

Define a function to perform the distance conversion based on selected unit.

Place this code in lines 4-12: